CN113053313B

CN113053313B - OLED screen ghost reduction method, system, device and storage medium

Info

Publication number: CN113053313B
Application number: CN202110327879.0A
Authority: CN
Inventors: 苗运齐; 刘硕; 贺晓巍
Original assignee: Suzhou Keda Technology Co Ltd
Current assignee: Suzhou Keda Technology Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2022-08-02
Anticipated expiration: 2041-03-26
Also published as: CN113053313A

Abstract

The invention provides a method, a system, equipment and a storage medium for reducing the ghost shadow of an OLED screen, wherein the method comprises the following steps: when the current OLED screen is detected to be in a screen-fixing state, starting periodic screen refreshing tasks, wherein each screen refreshing cycle comprises multiple rounds of screen refreshing tasks; dividing a minimum refreshing unit in a screen, and determining the number of closed pixel points in each turn of screen refreshing task in the minimum refreshing unit; when each round of screen refreshing task starts, selecting the position of a pixel point needing to be closed in each minimum refreshing unit; and refreshing the screen to close the selected pixel points needing to be closed. By adopting the invention, the application has no design requirement, and the current fixed screen image can not be forced to exit, thus being suitable for reducing the residual shadow of the OLED screen in various scenes.

Description

OLED screen ghost reduction method, system, device and storage medium

Technical Field

The invention relates to the technical field of screen display, in particular to an OLED screen ghost shadow reducing method, system, equipment and storage medium.

Background

An OLED (organic light-Emitting semiconductor) screen is a display technology that emits light by driving an organic thin film itself with a current, and has a self-luminous characteristic.

When the OLED screen displays a certain static image for a long time, the whole image has uneven brightness, and if the organic light-emitting materials of the screen continuously emit light for a long time, the aging speed of the screen is increased, and an image remained by the static image appears on the screen, and the remained image is generally called as a ghost. The main reason for the afterimage is that when each pixel of the stop-motion image is displayed on the screen, the brightness and the darkness are different, so that the aging speed of each pixel of each screen is different, and if the aging difference of the pixels is higher, the afterimage phenomenon of the screen is more obvious.

In the current OLED television, if a user watches a certain television station for a long time, the logo part of the television station is still for a long time, and if the user switches to other television programs, the logo position can invisibly see the shape of the logo of the television station which is watched all the time before. In addition, because the system status bar is still for a long time, the Android smart phone is mainly used for displaying conventional information such as electric quantity, signals and time, and after the device is used for a long time, the mobile phone displays a pure-color picture in a full screen mode, and traces of icon information such as the electric quantity and the signals can be hidden and seen in the position of the status bar.

There are two kinds of common afterimages, one is a bright afterimage, and the other is a dark afterimage.

The bright afterimage means that the residual image is brighter than the images at other places, the bright afterimage can be gradually restored after a period of time, but the display effect is affected, and after the bright afterimage appears, if the device is restarted, the afterimage phenomenon may disappear. The dark afterimage refers to the condition that the residual image is darker than the images at other places, which is caused by the use loss attenuation of the luminescent material, the dark afterimage phenomenon is thorough physical damage, the image is unrecoverable after the dark afterimage appears, and the common afterimage phenomenon belongs to the dark afterimage. The display difference of each pixel point of the whole screen is small as much as possible, so that the occurrence of the screen ghost is solved to a certain extent, and the service time of the screen can be effectively prolonged.

The existing technology for solving the screen ghost basically avoids displaying static pictures for too long time as much as possible, applies the technology to avoid pictures with unbalanced brightness and darkness distribution as much as possible, and can adopt low-brightness animation screen saver display when no information is input or output; a dark mode may be used to reduce the brightness of the screen as a whole. If the ghost shadow appears in the equipment, the screen can display a full-white picture, the brightness of the equipment is adjusted to be brightest, the equipment can display for hours, the purpose is to enable the aging degree of each pixel of the whole screen to be basically synchronous, and the use influence caused by the ghost shadow can be relieved to a certain extent. There is also a way to reduce the bright-dark contrast of the screen image by the App itself. However, the above solutions either have no versatility due to the increased design requirements of the App, or have the screen exit the current fixed screen image through the screen saver, so that the requirements of the client for using the scene do not meet.

Disclosure of Invention

The invention aims to provide an OLED screen ghost reduction method, an OLED screen ghost reduction system, OLED screen ghost reduction equipment and a storage medium, which have no design requirements on an application and can not forcibly quit a current fixed screen image, and are suitable for OLED screen ghost reduction in various scenes.

The embodiment of the invention provides an OLED screen ghost reducing method, which comprises the following steps:

when the current OLED screen is detected to be in a screen-fixing state, starting periodic screen refreshing tasks, wherein each screen refreshing cycle comprises multiple rounds of screen refreshing tasks;

dividing a minimum refreshing unit in a screen, and determining the number of closed pixel points in each turn of screen refreshing task in the minimum refreshing unit;

when each round of screen refreshing task starts, selecting the position of a pixel point needing to be closed in each minimum refreshing unit;

and refreshing the screen to close the selected pixel points needing to be closed.

By adopting the method for reducing the residual image of the OLED screen, when the screen is detected to be in a fixed screen state, the periodic screen refreshing task is automatically started, the minimum refreshing unit is taken as a unit, the position of each turn of pixel points needing to be closed is selected in each minimum refreshing unit, and the screen is refreshed accordingly to close the pixel points needing to be closed, so that the light emitting function of the pixel points in a certain proportion is periodically and alternately started and closed, the aging degree of the pixel points of the whole screen can be basically synchronous, and the phenomenon of screen burning residual image caused by fixed screen can be effectively reduced.

In some embodiments, the dividing the minimum refresh unit in the screen and determining the number of pixels closed in each refresh task in the minimum refresh unit includes the following steps:

loading a screen refreshing strategy set by a user, wherein the screen refreshing strategy comprises the size of a minimum refreshing unit and the proportion and/or the number of pixel points closed during each round of refreshing task in the minimum refreshing unit;

dividing the minimum refreshing unit in the screen according to the size of the minimum refreshing unit;

and determining the number of the pixel points closed during each round of refreshing task in the minimum refreshing unit according to the screen refreshing strategy.

In some embodiments, before the loading the screen refresh policy set by the user, the method further includes the following steps:

providing a screen refreshing strategy configuration page to a user side;

generating a running effect experience area in the screen refreshing strategy configuration page, simulating a pixel point of a minimum refreshing unit by adopting a pixel block comprising a plurality of pixel points in the running effect experience area, and simulating at least one minimum refreshing unit in the running effect experience area;

and after receiving a screen refreshing strategy set by a user, displaying a refreshing effect in the operation effect experience area according to the screen refreshing strategy set by the user.

In some embodiments, after the periodic screen refresh task is started, the method further comprises the following steps:

setting the interval time of each turn of screen refreshing task;

and starting a timing function, determining the time of each round of screen refreshing task according to the interval time, and starting the corresponding screen refreshing task when the time of each round of screen refreshing task is reached.

In some embodiments, selecting a position of a pixel point needing to be turned off in each minimum refresh unit includes the following steps:

in each turn of screen refreshing task, selecting a position number corresponding to the initial position of a pixel point needing to be closed in the minimum refreshing unit;

according to the number of the closed pixel points in each round of screen refreshing task in the minimum refreshing unit, selecting the position numbers of other pixel points except the initial position in the minimum refreshing unit, and the method comprises the following steps:

if the proportion of the number a of the pixel points to be closed in each turn of screen refreshing task in the minimum refreshing unit to the total number b of the pixel points in each minimum refreshing unit is less than or equal to 1/2, adding n to the position number of the previous position to be used as the position number of the next position; if the proportion of the number a to the total number b is greater than 1/2, adding m to the position number of the previous position to be used as the position number of the next position, wherein m and n are preset coefficients, and m is less than n;

and if the obtained position number exceeds the number b, the position number is subjected to residue taking with the number b, and the position number is updated by adopting the remainder.

In some embodiments, the selecting a position number corresponding to an initial position of a pixel point that needs to be closed in the minimum refresh unit includes the following steps:

for the first round of screen refreshing task, randomly selecting a position number corresponding to the initial position of a pixel point needing to be closed in the minimum refreshing unit;

for a subsequent screen refreshing task, if the proportion of the number a to the total number b is less than or equal to 1/2, adding q to the position number of the initial position of the pixel needing to be closed in the previous screen refreshing task, wherein q is a preset coefficient, so as to obtain the position number of the initial position of the pixel needing to be closed in the current screen refreshing task, and if the proportion of the number a to the total number b is greater than 1/2, adding the number a to the position number of the initial position of the pixel needing to be closed in the previous screen refreshing task, so as to obtain the position number of the initial position of the pixel needing to be closed in the current screen refreshing task;

and if the obtained position number of the initial position is greater than the total number b, taking the obtained position number of the initial position and the total number b for remainder, and updating the position number of the initial position of the pixel point needing to be closed in the current round of screen refreshing task by adopting the obtained remainder.

In some embodiments, after the selecting the position of the pixel point needing to be turned off in each minimum refresh unit, the method further includes the following steps:

judging whether a progressive refreshing mode is adopted or not for the current screen refreshing task;

if yes, splitting the round of screen refreshing task into multiple screen refreshing subtasks according to a preset splitting frequency y, and progressively closing the selected closed pixel points in the round;

and sequentially executing each screen refreshing subtask in the round of screen refreshing tasks.

In some embodiments of the present invention, the,

determining a closed pixel point in the ith screen refreshing subtask by adopting the following steps, wherein i belongs to (1, y):

for the position of the pixel point which is selected to be closed in the previous round, the number of the minimum refreshing unit where the pixel point is located and the splitting times y are used for calculating a remainder, and if the remainder is larger than i-1, the pixel point is kept to be continuously closed in the screen refreshing subtask;

and for the position of the pixel point selected to be closed in the current round, calculating the remainder of the number of the minimum refreshing unit where the pixel point is located and the splitting times y, and if the remainder is less than or equal to i-1, closing the pixel point in the current screen refreshing subtask.

In some embodiments, the refreshing the screen to close the selected pixel point needing to be closed includes the following steps:

acquiring a screen refreshing array, wherein each value in the screen refreshing array corresponds to a pixel point;

restoring the numerical value corresponding to the pixel point which is closed in the previous round in the screen refreshing array to a default value, and setting the numerical value corresponding to the pixel point which needs to be closed in the current round as a preset pixel closing value;

and refreshing the screen based on the screen refreshing array so as to close the selected pixel points needing to be closed.

The embodiment of the invention also provides an OLED screen afterimage reducing system, which is applied to the OLED screen afterimage reducing method, and the system comprises the following steps:

the state monitoring module is used for detecting whether the current OLED screen is in a screen fixing state or not;

the task scheduling module is used for starting the screen refreshing module when the screen is in a screen fixing state so as to start periodic screen refreshing tasks, and each screen refreshing cycle comprises a plurality of rounds of screen refreshing tasks;

the screen refreshing module is used for dividing a minimum refreshing unit in a screen, determining the number of closed pixel points in each turn of screen refreshing task in the minimum refreshing unit, selecting the position of the pixel point needing to be closed in each minimum refreshing unit when each turn of screen refreshing task starts, and refreshing the screen so as to close the selected pixel point needing to be closed.

By adopting the OLED screen ghost reduction system, whether the current OLED screen is in a screen-fixing state or not is detected through the task monitoring module, when the screen is detected to be in the screen-fixing state, the periodic screen refreshing task is automatically started through the task scheduling module, the screen refreshing module takes the minimum refreshing unit as a unit, the position of each round of pixel points needing to be closed is selected in each minimum refreshing unit, and the screen is refreshed accordingly to close the pixel points needing to be closed, so that the pixel point light-emitting function of a certain proportion is periodically and alternately started and closed, the aging degree of the pixel points of the whole screen can be basically synchronous, and the screen burn-in ghost phenomenon caused by screen fixing can be effectively reduced.

The embodiment of the present invention further provides an OLED screen ghost reduction device, including:

a processor;

a memory having stored therein executable instructions of the processor;

wherein the processor is configured to perform the steps of the OLED screen ghosting reduction method via execution of the executable instructions.

By adopting the OLED screen afterimage reduction device provided by the invention, the processor executes the OLED screen afterimage reduction method when executing the executable instruction, so that the beneficial effect of the OLED screen afterimage reduction method can be obtained.

The embodiment of the invention also provides a computer readable storage medium for storing a program, and the program realizes the steps of the OLED screen afterimage reduction method when being executed by a processor.

By adopting the computer readable storage medium provided by the invention, the stored program realizes the steps of the OLED screen afterimage reduction method when being executed, thereby obtaining the beneficial effects of the OLED screen afterimage reduction method.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a flowchart illustrating an OLED screen ghost reduction method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an OLED screen ghost reduction system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an OLED screen ghost reduction system according to an embodiment of the present invention;

FIG. 4 is a flow chart of a method for reducing the afterimage of an OLED screen according to an embodiment of the present invention;

FIGS. 5 and 6 are graphs comparing the effects of the method for reducing the afterimage on the OLED screen according to the present invention, wherein FIG. 5 is the original graph, and FIG. 6 is the screen display graph after the method is adopted;

FIGS. 7 and 8 are comparison diagrams of the verification of the method for reducing the afterimage on the OLED screen according to the present invention, wherein FIG. 7 is the original image, and FIG. 8 is the screen display diagram after the method is adopted;

FIG. 9 is a schematic structural diagram of an OLED screen ghost reduction device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a computer storage medium according to an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

As shown in fig. 1, in an embodiment, the present invention provides an OLED screen ghost reduction method, including the following steps:

s100: when the current OLED screen is detected to be in a screen-fixing state, starting periodic screen refreshing tasks, wherein each screen refreshing cycle comprises multiple rounds of screen refreshing tasks;

s200: dividing a minimum refreshing unit in a screen, and determining the number of closed pixel points in each turn of screen refreshing task in the minimum refreshing unit;

s300: when each round of screen refreshing task starts, selecting the position of a pixel point needing to be closed in each minimum refreshing unit;

s400: and refreshing the screen to close the selected pixel points needing to be closed.

Because the OLED screen has the self-luminous characteristic of each pixel, the pixel point of the black part is not luminous, so when the screen image is still, if the pixel point of a certain proportion can be periodically closed through an algorithm, the closed pixel point can not be in a state of always emitting light, so when the screen is fixed by equipment, the aging degree of the pixel point of the whole screen can be basically synchronous through periodically and alternately opening and closing the luminous function of the pixel point of the certain proportion, and the phenomenon of screen burn and ghost of the screen can be effectively solved.

According to the invention, after the screen is in a fixed screen state and lasts for a period of time, the self-luminous characteristic of each pixel of the OLED screen is utilized, the screen image is periodically refreshed through an algorithm strategy to close a certain proportion of the pixel points, so that the pixel points do not emit light within a certain period of time, and after a period of time, the pixel points of the other part are closed, so that the pixel points of each part can be periodically closed through several cycles, and the phenomenon of screen burn-in and afterimage caused by the use difference of different pixel points is effectively solved.

Therefore, by adopting the method for reducing the residual image of the OLED screen, the periodic screen refreshing task is automatically started when the screen is detected to be in the screen fixing state in the step S100, the positions of the pixel points needing to be closed in each round are selected in each minimum refreshing unit by taking the minimum refreshing unit as a unit in the steps S200-S400, and the screen is refreshed accordingly to close the pixel points needing to be closed, so that the light emitting function of the pixel points with a certain proportion is periodically and alternately started and closed, the aging degree of the pixel points of the whole screen can be basically synchronous, and the phenomenon of screen burning residual image caused by screen fixing can be effectively reduced.

In the step S100, the OLED screen is subjected to screen-fixing state detection, specifically, whether an image is rendered for an App currently in front-end display is monitored, and if there is a screen-fixing condition that no image is rendered for a long time, a periodic screen refreshing task is started to close partial pixel points of the screen. If the current device has certain operation behavior of a user, the periodic refreshing function is automatically stopped, and in order to stop the periodic refreshing function timely, the running state of the device with the OLED screen needs to be monitored from multiple layers.

For example:

1) whether the on-off state of the screen is changed within a preset time period or not is judged;

2) whether a touch screen operation event of a user occurs within a preset time period or not;

3) whether a user has key operation within a preset time period or not;

4) whether a screen turning event occurs on a screen within a preset time period or not;

5) whether the screen image is changed within a preset time period or not is judged;

only when various states of the equipment meet the requirements, namely the conditions do not occur in a preset time period, the equipment can be determined to be in the screen fixing state currently, the periodic refreshing function can be started at the moment, and otherwise, the periodic refreshing function is stopped. Here, it is only one way to determine the screen-fixing state, and in other alternative embodiments, other conditions may be adopted for determination.

In this embodiment, the step S200: the method comprises the following steps of dividing a minimum refreshing unit in a screen, and determining the number of closed pixel points in each round of refreshing task in the minimum refreshing unit:

and loading a screen refreshing strategy set by a user, wherein the screen refreshing strategy comprises the size of the minimum refreshing unit and the proportion and/or the number of pixel points closed in each round of refreshing task in the minimum refreshing unit.

The ratio of the pixel points closed in each round of refreshing task in the minimum refreshing unit is the ratio of the pixel points closed in each round of refreshing task in the minimum refreshing unit to the total number of the pixel points in the minimum refreshing unit, and is also equal to the ratio of the number of the pixel points to be closed on the whole screen in each round of refreshing task to the total number of the pixel points on the screen.

Assuming that a square block with a length of 3 pixels and a width of 2 pixels is used as a minimum refresh unit, and there are 6 pixel points in the minimum refresh unit, then pixel points with a ratio of 30% can be selected to be turned off each time, that is, 2 pixel points in the lowermost refresh unit are turned off. Assuming that the position serial numbers of the pixel points in each minimum refreshing unit are numbered from 0 to 5, then assuming that the first round refreshes and closes the pixel points with the serial numbers of 0 and 1, the second round refreshes and closes 2 and 3, and the third round 4 and 5, so that all the pixel points in the minimum refreshing unit can be closed once every three rounds of a cycle, and all the pixel points in the screen can be refreshed and closed once every three rounds of the cycle refreshes and closes a cycle.

The value of this ratio cannot be too large nor too small in each turn of the screen refresh task. If the ratio value is larger, the user can obviously feel that the screen image has a flickering effect (commonly called as 'screen flickering') when the screen is refreshed, so that the screen can generate a periodical screen flickering phenomenon, which has a bad influence on the user experience. If the value of the ratio is smaller, the time required for refreshing all the pixel points once is too long, so that in each round of refreshing period, the pixel point which is closed earliest on the screen can be turned to the next round of closing and refreshing after waiting for a long time, and the problem of screen aging and residual shadow caused by uneven use of the pixel points cannot be solved well. In conclusion, the value of the ratio needs to be reasonably selected, and the ratio which can obtain a relatively excellent effect can be selected through actual test verification, so that the problem of screen ghost can be reduced as much as possible.

Specifically, if the screen refresh policy includes the number of pixels that are turned off during each turn of refresh task in the minimum refresh unit, the number of pixels that are turned off during each turn of refresh task in the minimum refresh unit in the refresh process is defined based on the screen refresh policy. And if the screen refreshing strategy comprises the proportion of the pixel points closed in each round of refreshing task in the minimum refreshing unit, obtaining the number of the pixel points closed in each round of refreshing task in the minimum refreshing unit in the refreshing process according to the total number of the pixel points in each minimum refreshing unit multiplied by the proportion of the pixel points.

Since the screen refresh function requires the use of a specific refresh policy, for example: and when the proportion of the pixel points needs to be closed in each refreshing process, a screen refreshing strategy configuration page for the user to adjust the screen refreshing strategy needs to be provided, so that the user can perform corresponding configuration according to the actual needs of the user.

Specifically, before the screen refresh policy set by the user is loaded, the method further includes the following steps:

and providing a screen refreshing strategy configuration page to the user side, and receiving a screen refreshing strategy configured by the user in the screen refreshing strategy configuration page.

In step S200, a minimum refresh unit is divided in the screen, that is, the entire screen is divided into a plurality of blocks by the minimum refresh unit according to the size of the minimum refresh unit, assuming that the resolution of the screen is 1920 × 1080, and the minimum refresh unit is 2 × 3, that is, the length of the minimum refresh unit is 3 pixels and the width of the minimum refresh unit is 2 pixels, the screen can be divided into (1920/2) × (1080/3) × 960 × 360 × 345600 blocks, and the size of each block is 2 × 3, so that the entire screen can be processed not by using a pixel as a unit, but according to the minimum refresh unit, and all the minimum refresh units can be sorted by rows and then by columns, assuming that the sorted numbers sequentially range from 0 to 345599, the refresh strategy of each refresh unit is calculated, and obtaining the pixel positions to be closed in each minimum refreshing unit, then storing all the pixel positions to be closed in an array, and finally refreshing the screen to close the pixel points at the corresponding positions in the array.

And the screen refreshing strategy configuration page can also provide an operation effect experience area aiming at the current refreshing strategy, so that a user can check the screen effect of the current screen refreshing strategy after operation in real time. In order to enable a user to more clearly understand the concept of the minimum refreshing unit and the strategy operation mechanism of the closed pixel point under each refreshing unit, one pixel point is simulated by using one pixel block in each minimum refreshing unit in the region, namely, a plurality of pixel points are simulated into one pixel point, so that the user looks more intuitive.

Specifically, a running effect experience area is generated in a screen refreshing strategy configuration page, a pixel block comprising a plurality of pixel points is adopted in the running effect experience area to simulate one pixel point of a minimum refreshing unit, and at least one minimum refreshing unit is simulated in the running effect experience area; and after receiving a screen refreshing strategy set by a user, displaying a refreshing effect in the operation effect experience area according to the screen refreshing strategy set by the user.

For example, a rectangular effect experience area with 480 pixels long and 1080 pixels wide is divided into 12 rectangular squares with 120 pixels long and 270 pixels wide, each rectangular square with 120 × 270 is regarded as a minimum refresh unit, and assuming that the minimum refresh unit is 2 × 3, each pixel point in the minimum refresh unit actually represents (120/2) (270/3) 60 × 90 — 5400 pixel points, so that in the operation effect experience area, a user can more intuitively sense an operation mechanism of a screen refresh policy under the current refresh policy.

If all the pixel points of the screen are refreshed and closed once, the refreshing is performed for a plurality of times, and as for the refreshing, all the pixel points of the screen can be completely refreshed once, and the time depends on the refreshing time interval of each time. Specifically, in this embodiment, after the periodic screen refresh task is started in step S100, the method further includes the following steps:

setting the interval time of each turn of screen refreshing task;

and starting a timing function, and starting the corresponding screen refreshing task when the time of each round of screen refreshing task is reached.

When the screen refreshing function is started, a TimerTask for timing refreshing is started, the TimerTask starts a next round of refreshing task at a fixed time interval, and the fixed time is the interval time of each round of refreshing, so that the function of timing refreshing of the screen can be realized, but when the state of the equipment is changed (for example, the equipment is turned off), the timing task needs to be closed.

And when the user carries out user refreshing strategy configuration, the time interval of each turn of screen refreshing task can be confirmed. If the value of the time interval of each turn of screen refreshing task is large, the time period for refreshing and closing all pixel points of the screen once is long, if so, in each refreshing period, the closed pixel points in the first turn of refreshing task need to wait for a long time to be closed in the next screen refreshing period, and thus, the problem of screen aging and residual shadow caused by uneven use of the screen pixel points can also occur. If the time interval of each round of screen refreshing task is smaller, screen refreshing is too frequent, CPU and memory resources need to be applied for each refreshing, the extra resource overhead does not belong to the App service category, and if refreshing is too frequent, too high power consumption can cause too large negative influence on the cruising ability of equipment. In summary, the time interval of each turn of screen refreshing task also needs to take a relatively appropriate value, and a time interval value with excellent effect can be selected through an actual test verification process, so that the problem of screen ghosting is reduced as much as possible. The problem of screen aging and ghost shadow caused by uneven use of screen pixel points can be avoided, and the endurance of equipment is influenced due to overhigh extra power consumption caused by too frequent refreshing of a screen.

In this embodiment, the step S300: selecting the position of a pixel point needing to be closed in each minimum refreshing unit, wherein the method comprises the following steps:

if the proportion of the number a of the pixel points to be closed in each turn of screen refreshing task in the minimum refreshing unit to the total number b of the pixel points in each minimum refreshing unit is less than or equal to 1/2, adding n to the position number of the previous position to be used as the position number of the next position; if the proportion of the number a to the total number b is greater than 1/2, adding m to the position number of the previous position as the position number of the next position, where m and n are preset coefficients, m < n, where n is 2 and m is 1;

and if the obtained position number exceeds the total number b, the position number is subjected to residue comparison with the total number b, and the position number is updated by adopting a remainder.

Specifically, after the initial position of the pixel to be closed in each minimum refresh unit is obtained, the subsequent position of the pixel to be closed in each minimum refresh unit is obtained through the initial position. At the moment, if the proportion of the number of the pixel points to be closed in each minimum refreshing unit to the number of the pixel points in each minimum refreshing unit is not more than half, adding 2 to the next position of the pixel points to be closed on the basis of the previous position; and if the proportion of the number of the pixels to be closed in each minimum refreshing unit to the number of the pixels in each minimum refreshing unit exceeds half, adding 1 to the next position of the pixels to be closed on the basis of the previous position. For example, the minimum refresh unit is 2 × 3, the number of 6 pixels therein is 0 to 5, and the number of the initial position of the pixel to be closed by the current first minimum refresh unit is 2; at this time, if the number of the pixel points needing to be closed is 3 (not more than half), the position numbers of the two pixel points needing to be closed are sequentially added with 2 on the basis of the last pixel point, and then the rest is taken, the corresponding values are 4 and 0, and therefore the position numbers of the pixel points needing to be closed of the first minimum refreshing unit in the round of refreshing are 2, 4 and 0; if the number of the pixel points needing to be closed is 4 (more than half), then the position numbers of the subsequent two pixel points needing to be closed are sequentially added with 1 on the basis of the previous one, and then the rest is taken, so that the corresponding values are 3, 4 and 5, and the position numbers of the pixel points needing to be closed are 2, 3, 4 and 5.

The pixel points of a certain number need to be closed in each minimum refreshing unit, the number of the pixel points to be closed in each refreshing unit is the same, and the position numbers of the pixel points to be closed in each round of refreshing can be the same or different relative to the position numbers of the minimum refreshing units to which the minimum refreshing units belong. Assuming that the minimum refresh unit is 2 × 3, the number of each pixel point position in the minimum refresh unit is from 0 to 5, and the number of pixel points that need to be turned off in each refresh is 2, the position number of the first minimum refresh unit at this time may be 0 and 1, and the position number of the second minimum refresh unit may be 0 and 1 or 2 and 3. If the numbers of the pixel positions to be closed in each minimum refreshing unit are the same, the closed pixel positions are basically in a line or a row pattern, black horizontal stripes or vertical stripes can appear on a screen after the pixel positions are closed through screen refreshing, the stripes have poor experience for users, the pixel positions to be closed in each minimum refreshing unit can be randomly selected at the moment, and the positions are random, so that the pixel positions to be closed in all the minimum refreshing units cannot have a certain rule, namely the pixel positions cannot be in the line or the row pattern, therefore, the random pixel positions in the positions on the screen cannot have the stripe pattern after being closed, and the screen at the moment can present a frosted effect.

Specifically, in this embodiment, the selecting a position number corresponding to an initial position of a pixel point that needs to be closed in the minimum refresh unit includes the following steps:

the initial position of the pixel point to be closed in each minimum refreshing unit may be a random number not greater than the number of the pixel points in each minimum refreshing unit, for example, the number of the pixel points in the minimum refreshing unit is 6, and then the random number may be any random value from 0 to 5, at this time, the initial position of the pixel point to be closed in each minimum refreshing unit is any random value from 0 to 5, and then the positions of other pixel points to be closed in each minimum refreshing unit are obtained by calculation according to respective initial random values, so that the position numbers of all the pixel points to be closed are also ensured to be substantially random.

For the subsequent screen refreshing task, if the proportion of the number a to the total number b is less than or equal to 1/2, adding q to the position number of the initial position of the pixel needing to be closed in the previous screen refreshing task, wherein q is a preset coefficient, in the embodiment, q is 1, obtaining the position number of the initial position of the pixel needing to be closed in the current screen refreshing task, and if the proportion of the number a to the total number b is greater than 1/2, adding the number a to the position number of the initial position of the pixel needing to be closed in the previous screen refreshing task, obtaining the position number of the initial position of the pixel needing to be closed in the current screen refreshing task;

Namely, the initial position of the pixel point to be closed of each minimum refreshing unit is obtained in the second and later refreshing rounds by adopting the following method:

for a first refresh round under a specific refresh strategy, each minimum refresh unit has already determined the initial position of a pixel point to be closed through a random strategy, how to take the initial position of each minimum refresh unit in each subsequent refresh round? If the ratio of the number of pixels to be closed to the number of pixels in each minimum refreshing unit does not exceed half, adding 1 to the initial position of the pixel to be closed in each minimum refreshing unit in each subsequent refreshing task round; if the ratio of the number of the pixel points to be closed in each minimum refreshing unit to the number of the pixel points in each minimum refreshing unit exceeds half, adding the numerical value corresponding to the number of the pixel points to be closed in each minimum refreshing unit on the basis of the previous round at the initial position of the pixel points to be closed in each minimum refreshing unit in each subsequent round of refreshing tasks; if the value exceeds the number of the pixel points of the minimum refreshing unit, the remainder operation is carried out with the number value of the pixel points of each minimum refreshing unit, and the final remainder is the initial position of the pixel point to be closed by the minimum refreshing unit in the current round of refreshing task. For example, the number of pixels included in each minimum refresh unit is 6, the number of pixels to be closed in each refresh cycle is 4, and when the previous refresh cycle is performed, the starting position of the pixel to be closed in the minimum refresh unit is 3, so that the starting position of the pixel to be closed in the minimum refresh unit in the current refresh cycle is (3+ 4)% 6 ═ 1, and so on, the starting position of the pixel to be closed in each minimum refresh unit in each refresh cycle can be taken out.

In this embodiment, the step S300: after the position of the pixel point needing to be closed is selected in each minimum refreshing unit, the method further comprises the following steps:

For example, the refresh proportion of each round is 30%, and the round is divided into 7 subtasks to refresh progressively, so that when refreshing for the first time, aiming at the pixel point position selected to be closed in the previous round, if the remainder value of the number of the minimum refresh unit in which the position is located and 7 is greater than 0, the pixel point position continues to be closed; for the pixel point position selected and closed in the round, if the value of the number of the minimum refreshing unit where the position is located after the residue is obtained from 7 is less than or equal to 0, the position of the pixel point is closed, so that in the pixel point which is refreshed and closed for the first time, only the pixel point which is selected and closed in the round and is located in the minimum refreshing unit where the number is a multiple of 7 is closed, namely 6/7 is the pixel point which is closed in the previous round, and 1/7 is the pixel point which is closed in the round; similarly, during the second refresh, for the pixel position selected and closed in the previous round, if the value of the number of the minimum refresh unit in the position is greater than 1 after the remainder of the number of the minimum refresh unit is 7, the pixel position continues to be closed, and for the pixel position selected and closed in the previous round, if the value of the number of the minimum refresh unit in the position is less than or equal to 1 after the remainder of the number of the minimum refresh unit in the position is 7, the pixel position is closed, and in the pixel position selected and closed in the previous round, the number of the minimum refresh unit in the position is a multiple of 7 and the remainder of the number of the minimum refresh unit in the position is 1 after the remainder of the number of the minimum refresh unit in the position is 7, that is, 5/7 is the pixel position closed in the previous round, and 2/7 is the pixel position to be closed in the previous round; …, respectively; when the pixel point is refreshed for the sixth time, aiming at the pixel point position which is selected to be closed in the previous round, if the value of the number of the minimum refreshing unit at the position is more than 5 after the residue is obtained from 7, the pixel point position is continuously closed, aiming at the pixel point position which is selected to be closed in the previous round, if the value of the number of the minimum refreshing unit at the position is less than or equal to 5 after the residue is obtained from 7, the pixel point position is closed, in the pixel point which is selected to be closed in the previous round, the number of the minimum refreshing unit is the multiple of 7, the residue obtained from 7 is 1, 2, 3 and 4, 1/7 is the pixel point which is closed in the previous round, and 6/7 is the pixel point which is closed in the previous round; when the seventh time refreshes, select the pixel position of closing to last round, because all serial numbers all be less than or equal to 6 with 7 after seeking the remainder, consequently do not have the pixel of selecting to close of last round to keep closing, select the pixel position of closing to this round, if the value less than or equal to 6 after the number of the minimum refresh unit at this position place and 7 seek the remainder, the position of this pixel can be closed then, also be that this round is selected the pixel of closing all need to be closed at 7 th subtask, during 7 th subtask, all be the pixel that this round will be closed. Through the steps, the positions of the pixel points which need to be closed in each progressive refreshing process can be obtained.

When the user configures the screen refresh policy, the following configuration may also be performed:

(1) determining how many subtasks each round of refresh task needs to be divided to perform:

aiming at each round of screen refreshing task, when the refreshing task is specifically executed, in order to avoid the phenomenon of screen flashing caused by closing too many pixel points by one-time refreshing, the refreshing task of each round needs to be split into multiple subtasks again for execution, and the number of the pixel points to be closed by each subtask only accounts for a certain proportion of the number of the pixel points to be closed by the task of the round. For example: all will close screen 30%'s pixel in every round of refresh task, if this 30% proportion just all closes at a screen refresh, then the user can obviously feel the phenomenon that the screen appears flickering at this moment, to this kind of condition, can select to divide 30% proportion into the little task of 10 times again and refresh and close, so refresh as long as close screen 3%'s pixel at every turn, thereby in 10 times little tasks, the pixel quantity that closes is refreshed to every time the screen, compare with the pixel quantity that the task was closed in the round of refreshing, all increase 3% progressively, promptly: the first time refreshes the task and follows up a round of refresh task and has 3% different, the second time has 6% different with a round, the third time has 9% different with a round, …, the 10 th time has 30% different with a round, through the little refresh task of 10 times of accumulation progressive mode, just can accomplish 30% screen pixel and refresh the task, not only can ensure each round through this kind of mode and refresh, the pixel quantity proportion of closing can not be too little, and the phenomenon of screen splash can also not appear.

(2) Confirming the time interval of each progressive refreshing in each round of refreshing task

The image of the object is imaged on the retina, when the human eyes watch the image of the object, the image on the retina is input into the human brain through the optic nerve, then the human can feel the image of the object, but when the object moves, the image of the object by the optic nerve does not disappear immediately, but the time lasts for 0.1-0.4 second, if the interval time of each screen refreshing is too short, the visual memory at the moment still stays on the previous image, and the difference between the current image on the screen and the image in the human memory is too large, so that the change of the image line can be obviously felt, the phenomenon of screen flashing indirectly appears, if the interval of each screen refreshing is about 0.5 second, the time interval of the micro-change of the image can be kept basically consistent with the time of the visual persistence, so that the micro-change of the screen image can be synchronized with the change of the human vision, therefore, the obvious change of the image is not easy to be perceived, and the phenomenon that the screen flickers can not be sensed.

Under the condition that the refreshing proportion of each round is 30% in the prior test and verification, the refreshing task of each round is divided into 7 times of sub-tasks which are refreshed progressively, and the obvious screen flashing phenomenon cannot occur; for the case of other refresh ratios, the following two ways can be adopted, one is that all refresh ratios are disassembled according to 7 times; secondly, 7 times of disassembly corresponding to the proportion of 30% is used as a standard, the disassembly is carried out according to the standard for the refreshing tasks of other proportions, if the refreshing proportion is adjusted upwards, the disassembly times are increased in the same proportion, if the refreshing proportion is adjusted downwards, the disassembly times are also reduced in the same proportion, and the dynamic adjustment mode is feasible.

During the progressive refresh process, the progressive refresh state also needs to be monitored. Because the interval between two refreshes is 500ms in each progressive refresh, the interval of each progressive refresh cannot be too fast due to the influence of human eyes on the visual persistence of the image, otherwise, the phenomenon of screen flashing can occur, but within 500ms of the interval, the running state of the device can be changed, and when the state is changed, the subsequent refresh operation should be stopped immediately and the current screen refresh task should be exited. If the thread sleep operation is used in the 500ms time, at this time, once the thread enters the sleep state, the thread cannot communicate with the outside in the 500ms, at this time, even if the device state changes, the thread cannot be notified to stop the current refresh behavior, so that the sleep mode is not available, but a thread wait/notify mode is also used, the embodiment may send a message in a handler delay500ms mode before the thread wait, then call the thread wait method to suspend the running of the current thread, after waiting for 500ms, continue to operate after receiving the notification of notify, and if the device state change needs to stop the refresh task in the 500ms, send a message in advance to wake up the thread being waited to continue to operate to exit the current refresh task.

Through the previous steps, the position of the pixel point to be closed in each task refreshing is known, and the corresponding step is only processed to refresh the screen to close the pixel point in each refreshing. Specifically, the step S400: refreshing the screen to close the selected pixel points needing to be closed, and the method comprises the following steps:

Before the screen refresh is started, initializing an array by the device resolution, for example, if the device resolution is 1920 × 1080, the initialized array size is 1920 × 1080, and initializing the value of the array to 0x00ffffff, which means that the pixel at the position is transparent, that is, each pixel is not closed by default, when the screen refresh is performed for the first time, first taking out the pixel position to be closed during the first refresh, then setting the value corresponding to the position in the array to 0xff000000, that is, closing the pixel at the position, creating a bitmap through the array, then assigning the bitmap to the imageview, then refreshing the corresponding view by the windowmanager, and finally closing the pixel corresponding to the array definition during the screen refresh. In each refresh task from the second time, in order to avoid too large memory loss, the initialized array needs to be reused, before the pixel position to be closed is taken out, the value of the closed pixel position in the array at the last refresh is modified to 0x00ffffff, namely, the default transparent state is restored, then the pixel position to be closed is taken out again, then the array is modified according to the value of the position, the value of the position array is set to 0xff000000, and the next refresh step is the same as the first time.

The method for reducing the afterimage of the OLED screen can further comprise a function verification process. Since the final operation of the screen refresh policy is screen pixels, and the resolution of the current device is generally relatively large, for example, a 1080P resolution device has a pixel number of 1920 × 1080 ═ 2073600, so that if the final refresh effect is determined only by human observation, the reliability of the result is hard to guarantee, and therefore, a functional verification module is required, which can determine the correctness of the result according to the refresh policy selected by the current user. The function verification module mainly comprises the following verification points.

1) Whether the proportion of the pixel points closed during each round of refreshing meets the proportion set by the refreshing strategy or not

Calculating the quantity of all pixel points through the screen resolution, then traversing the pixel point array in each progressive refreshing task in each round of refreshing, finding out the total number of the pixel points needing to be closed, and finally dividing the total number of the pixel points needing to be closed by the total number of all the pixel points on the screen to obtain whether the occupation ratio of the pixel points needing to be closed in the progressive refreshing meets the policy expectation or not.

2) Whether a refresh cycle completely covers all pixel points in the screen

The number of the pixel points in the minimum refreshing unit needing to be closed in each round can be calculated, several refreshing tasks are needed in one refreshing cycle, the pixel point positions in the refreshing tasks in each round are stored, and if three refreshing rounds are needed in each cycle, after any three cycles, if the number of the pixel point positions which are closed in a refreshing mode is equal to the total number of the pixel points on the screen, one cycle can cover all the pixel points on the screen.

3) Whether or not to refresh in a progressive incremental manner in proportion at each progressive refresh

And finding out the number of the pixel points at the same position closed at the last time during each progressive refreshing, wherein if the ratio of the number is increased according to a fixed value every time, the progressive accumulation refreshing is explained. For example, each refresh round task is divided into 7 progressive refreshes, the increasing proportion of each progressive refresh is 1/7, if the increasing proportion of the actual verification just meets 1/7, the refreshing is carried out according to the progressive increasing proportion at each progressive refresh.

As shown in fig. 2, an embodiment of the present invention further provides an OLED screen afterimage reduction system, which is applied to the OLED screen afterimage reduction method, and the system includes:

and the state monitoring module M100 is configured to detect whether the current OLED screen is in a screen-fixing state.

Specifically, the state monitoring module M100 may perform comprehensive monitoring on a screen-off state, a screen-touching state, a key state, a screen-turning state, and an image state in real time, start a screen periodic refreshing function when monitoring that an apparatus image is in a screen-fixing state, and exit the periodic screen refreshing function in time if an apparatus state change occurs during execution of the screen periodic refreshing;

and the task scheduling module M200 is used for starting the screen refreshing module when the screen is in the screen-fixing state so as to start the periodic screen refreshing task, wherein each screen refreshing cycle comprises a plurality of rounds of screen refreshing tasks.

Specifically, when the state monitoring module monitors that the device is in the screen-fixing state, the state monitoring module notifies the task scheduling module M200 to perform a periodic screen refreshing task, and the task scheduling module mainly performs functions of device state change confirmation, filtering and sequencing between the state monitoring module M100 and the screen refreshing module M300;

the screen refreshing module M300 is configured to divide a minimum refreshing unit in a screen, determine the number of pixels to be closed in each turn of screen refreshing task in the minimum refreshing unit, select the position of a pixel to be closed in each minimum refreshing unit when each turn of screen refreshing task starts, and refresh the screen to close the selected pixel to be closed.

Specifically, when the screen refresh is started, the screen refresh module M300 loads the screen refresh policy first, then obtains the starting position of the pixel point to be closed in each minimum refresh unit, calculates the positions of other pixel points to be closed in each minimum refresh unit according to the starting position, and finally performs the screen refresh operation by the progressive accumulation method.

By adopting the OLED screen ghost reducing system, whether the current OLED screen is in a screen-fixing state is detected through the task monitoring module M100, when the screen is detected to be in the screen-fixing state, the periodic screen refreshing task is automatically started through the task scheduling module M200, the screen refreshing module M300 takes the minimum refreshing unit as a unit, the position of each round of pixel points needing to be closed is selected in each minimum refreshing unit, the screen is refreshed accordingly, the pixel points needing to be closed are closed, and therefore the pixel point light-emitting function of a certain proportion is periodically and alternately started and closed, the aging degree of the pixel points of the whole screen can achieve basic synchronization, and the screen burn ghost phenomenon caused by screen fixing can be effectively reduced.

Fig. 3 is a schematic structural diagram of an OLED screen ghost reduction system according to an embodiment of the invention. In this embodiment, the system further includes an effect presentation module, a function verification module, and a policy configuration module. The policy configuration module is used for enabling a user to customize a screen refresh policy of the user, for example, to select a specification of 2 × 3 or 3 × 3 of a minimum refresh unit, to select a proportion of pixel points to be closed in each minimum refresh unit, and the like. The effect display module is used for generating an operation effect experience area, and through pixel point simulation, a user can intuitively feel the operation principle and effect of the periodic screen refreshing function.

The function verification module is mainly used for function verification, and the main verification contents comprise:

(1) and during each round of refreshing, whether the ratio of the number of the closed pixel points is the same as the ratio set by the refreshing strategy or not is judged.

(2) And whether the progressive refreshing method in each refreshing process refreshes the pixels in the refresh process in a gradual accumulation mode according to the number of the pixels to be closed in the refresh process.

(3) Whether all pixel points on the screen are refreshed once in each refreshing period.

Referring to fig. 4, a method for reducing the afterimage of the OLED screen according to an embodiment of the present invention is described in detail below with reference to the modules.

The whole screen period refreshing flow is divided into twelve steps, in the figure ((c)) (c)

Represents the execution sequence of twelve steps, which we next describe in turn.

Corresponding to step S100, the state monitoring module is always monitoring the state of the device, and if it is monitored that the device is about to be shut down, the current policy state is saved, and the related task of screen refreshing is stopped.

Corresponding to step S100, the state monitoring module performs comprehensive judgment on a screen-off state of the screen, a click or sliding state of the touch screen, a press or bounce state of the key, whether the screen of the device is turned and whether the content of the screen image is changed, so as to determine whether the device is in a screen-fixing state. If any one of the conditions does not meet the requirements, the device is not considered to be in the screen-fixing state, and only if all the conditions meet the requirements, the device is considered to be in the screen-fixing state, and then the periodic screen refreshing task is started.

After the periodic refreshing task of the screen is started, if any one of the following states of the equipment is changed, namely screen-off behavior, touch screen clicking or sliding operation, any key pressing or bouncing action and screen change of the equipment are generated, the periodic refreshing task of the screen is immediately stopped at the moment.

Corresponding to step S200, after the periodic screen refresh task starts, the screen refresh module actively loads a screen refresh policy, for example: the size of the minimum refreshing unit and the number of pixel points to be closed in each turn in the minimum refreshing unit, and the screen is refreshed through the refreshing strategy. If the user modifies the refresh strategy through the strategy configuration interface in the screen refresh process, the new refresh strategy is actively synchronized to the screen refresh module, and then the screen refresh module uses the new refresh strategy to refresh the screen.

Corresponding to step S200, the screen refreshing module will divide the layout of the current screen according to the size of the minimum refreshing unit, where the screen originally uses the pixel points as the minimum unit, and when it is necessary to process the screen, it must sequentially traverse each pixel point, and the minimum unit processed on the screen is no longer the pixel point but the minimum refreshing unit defined in the screen refreshing policy, so that the minimum refreshing unit can be used as the minimum unit traversed by the screen.

Sixthly, corresponding to the selection of the pixel point position in the step S200, since the minimum unit of the screen traversal processing is the minimum refreshing unit and the pixel point position in the minimum refreshing unit is required to be random in each round of refreshing, when a screen refreshing task of each time is started, the pixel point position to be closed in the minimum refreshing unit needs to be initialized, the initialization operation is to take a random position value according to the number of the pixel points in each minimum refreshing unit, then the positions of other pixel points to be closed in each minimum refreshing unit are calculated and generated through an algorithm according to the random value.

And a complete screen refreshing cycle is formed by multiple turns of screen refreshing tasks, a certain time interval is reserved between every two turns of screen refreshing, the refreshing task of the current turn can be started only when the time of every turn of screen refreshing task reaches, the timing mechanism is realized through a timing task of the system, the timing mechanism is synchronously started when the screen refreshing function of the screen refreshing cycle is started, and is closed when the screen of the equipment is turned off, and the timing task can be restarted after the screen is turned on again.

Corresponding to the selection of the pixel point position needing to be closed in each round of screen refreshing task in the step S200, after each round of refreshing task starts, the pixel point position needing to be closed in the round of refreshing task is firstly obtained, and the position obtaining mode is related to the ratio of the number of the pixel points needing to be closed in each minimum refreshing unit. Then, for the minimum refresh unit, if the ratio is greater than half, the position index of each pixel point to be turned off is added by 1 on the basis of the position index of the pixel point to be turned off; if the ratio is not more than half, then each pixel index to be closed is added with 2 based on the previous pixel index to be closed. And adding 1 or 2 to obtain a value, and performing remainder operation with the number of the pixel points in the minimum refreshing unit, wherein the value after the remainder operation is the position of the next pixel point to be closed in each minimum refreshing unit.

Ninthly, corresponding to the progressive refreshing, after the pixel point position to be closed in each minimum refreshing unit is obtained, judging whether the refreshing of the current round is the first round refreshing from the start of the screen refreshing task of the period, if so, directly refreshing the screen without starting the progressive accumulated refreshing function; if not the first round of refreshing, then need open the refresh function of progressive accumulation, through progressive accumulation refresh, can effectively avoid because of once only closing too many pixel points, and the screen phenomenon of flickering that leads to. At this time, the progressive refreshing times can be obtained according to the number of the pixels to be closed in each round and the proportion of the number of the pixels in each minimum refreshing unit. If the proportion is larger, the corresponding refreshing times are also larger, otherwise, the corresponding refreshing times are smaller; meanwhile, the refreshing times of each round can be set to a fixed value, and each round of refreshing is divided into progressive accumulated refreshing of a fixed time to be executed.

Corresponding to the step S400, at present, all pixel positions to be closed are obtained, and at this time, a refreshing task is performed, firstly, an array is initialized according to the resolution of the device, the value of the array is initialized to 0x00ffffff, then the value of the position corresponding to the array is set to 0xff000000 according to the pixel position value to be closed, the value represents the pixel position at the position to be closed, then a bitmap is created through the array and is assigned to imageview, then the window manager refreshes the corresponding view through the imageview, and finally, the pixel position to be closed stated in the array is closed when the view screen refreshes.

Corresponding to the progressive refresh, the pixel positions to be closed in each refresh are partially the pixel positions to be closed in the previous refresh and partially the pixel positions to be closed in the previous refresh. If the refresh proportion of each round is 30%, 7 times of progressive refresh is carried out, then during the first refresh, aiming at the position of the pixel point which is selected and closed last time, if the sequence number of the minimum refresh unit at the position is greater than 0 after the sequence number and 7 after the sequence number are left, the position of the pixel point is continuously closed, aiming at the position of the pixel point which is selected and closed this time, if the sequence number of the minimum refresh unit at the position is less than or equal to 0 after the sequence number and 7 after the sequence number are left, the position of the pixel point is closed, therefore, among the pixel points which are refreshed and closed for the first time, 6/7 is the pixel point which is refreshed and closed for the last round, 1/7 is the pixel point which is to be closed for the round, and similarly, when refreshing for the second time, 5/7 is the pixel point which is closed for the last round, 2/7 is the pixel point which is to be closed for the round, …, in the sixth refresh, 1/7 is the pixel point closed in the previous refresh, 6/7 is the pixel point to be closed in the previous refresh, and in the seventh refresh, all the pixel points are the pixel points to be closed in the previous refresh. By the method, the positions of the pixel points to be closed in each refreshing are obtained, and then the specific refreshing task is consistent with the step 10.

In each round of refreshing, if the cycle number of progressive accumulated refreshing is finished, the refreshing task of the round is also finished, and the refreshing task of the round is finished at the moment to wait for starting the refreshing task of the next round.

Through 12 steps as above, when the screen of the device is fixed, the screen is periodically refreshed to close pixel points in a certain proportion, and after each refreshing period is finished, all the pixel points on the screen can be closed at least once, so that the phenomenon of screen burn and ghost shadow caused by screen image fixing can be effectively solved.

The comparison of the effects of the OLED screen afterimage method and the system of the invention can be seen in FIGS. 5 and 6. Fig. 5 shows an original effect of an image, and fig. 6 shows a screen effect after 30% of pixels are randomly turned off by screen refresh. As is obvious from the display effect of fig. 6, although 30% of the pixels are turned off, the user's visual experience is not substantially affected, and at this time, as long as the user performs any operation on the device, the current frosting effect is immediately exited and the image with the original effect is switched to.

The verification comparison after the OLED screen afterimage method and the system of the invention are adopted can be seen in figures 7 and 8. The verification method specifically sets a display effect with high image contrast to verify the effectiveness of the function, fig. 7 is an original image without starting the screen period refreshing function, and fig. 8 is an image effect with the screen period refreshing function started. The periodic refresh function randomly turns off 30% of the pixel images, and performs the next screen refresh task at intervals of 90 seconds. The effectiveness test of 7-24 hours is carried out continuously by the verification method, and the phenomenon of screen burn-in ghost does not occur after the whole test process is finished, so that the method provided by the invention can be well shown to have a positive effect on solving the problem of screen burn-in ghost caused by screen fixing.

The embodiment of the invention also provides an OLED screen ghost reduction device, which comprises a processor; a memory having stored therein executable instructions of the processor; wherein the processor is configured to perform the steps of the OLED screen ghosting reduction method via execution of the executable instructions.

As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.

An electronic device 600 according to this embodiment of the invention is described below with reference to fig. 9. The electronic device 600 shown in fig. 9 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.

As shown in fig. 9, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one storage unit 620, a bus 630 that connects the various system components (including the storage unit 620 and the processing unit 610), a display unit 640, and the like.

Wherein the storage unit stores program code executable by the processing unit 610 to cause the processing unit 610 to perform steps according to various exemplary embodiments of the present invention described in the above-mentioned electronic prescription flow processing method section of the present specification. For example, the processing unit 610 may perform the steps as shown in fig. 1.

The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.

The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.

Bus 630 may be one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.

The embodiment of the invention also provides a computer readable storage medium for storing a program, and the program realizes the steps of the OLED screen afterimage reduction method when being executed by a processor. In some possible embodiments, aspects of the present invention may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the present invention described in the above-mentioned electronic prescription flow processing method section of this specification, when the program product is run on the terminal device.

Referring to fig. 10, a program product 800 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or cluster. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. An OLED screen afterimage reducing method is characterized by comprising the following steps:

refreshing the screen to close the selected pixel points needing to be closed;

after the position of the pixel point needing to be closed is selected in each minimum refreshing unit, the method further comprises the following steps:

if yes, splitting the round of screen refreshing task into a plurality of times of screen refreshing subtasks according to a preset splitting frequency y, closing the pixel points selected and closed in the round progressively, wherein for the ith time of refreshing subtask, the number of the minimum refreshing unit where the positions of the pixel points in the previous round or the round are selected is calculated as a remainder according to the splitting frequency y, and whether the pixel points are closed in the current time of refreshing subtask is controlled according to a comparison result of the remainder and i-1;

2. The method for reducing the afterimage on the OLED screen according to claim 1, wherein the step of dividing the minimum refreshing unit in the screen and determining the number of the pixels closed in each refreshing task in the minimum refreshing unit comprises the following steps:

dividing the minimum refreshing unit in a screen according to the size of the minimum refreshing unit;

3. The OLED screen ghost reduction method according to claim 2, further comprising the following steps before loading the screen refresh policy set by the user:

providing a screen refreshing strategy configuration page to a user side;

generating a running effect experience area in the screen refreshing strategy configuration page, simulating a pixel point of a minimum refreshing unit in the running effect experience area by adopting a pixel block comprising a plurality of pixel points, and simulating at least one minimum refreshing unit in the running effect experience area;

4. The method for reducing the afterimage on the OLED screen according to claim 1, further comprising the following steps after the periodical screen refreshing task is started:

setting the interval time of each turn of screen refreshing task;

5. The method for reducing the afterimage on the OLED screen according to claim 1, wherein the step of selecting the position of the pixel point to be turned off in each minimum refresh unit comprises the following steps:

6. The method for reducing the afterimage on the OLED screen according to claim 5, wherein the selecting the position number corresponding to the starting position of the pixel point needing to be closed in the minimum refresh unit comprises the following steps:

7. The method for reducing the afterimage on the OLED screen according to claim 1, wherein the following steps are adopted to determine the pixel points closed in the ith screen refreshing subtask, i e (1, y):

8. The method for reducing the afterimage on the OLED screen according to claim 1, wherein the refreshing the screen to turn off the selected pixel points to be turned off comprises the following steps:

9. An OLED screen afterimage reducing system applied to the OLED screen afterimage reducing method of any one of claims 1 to 8, the system comprising:

10. An OLED screen ghost reduction apparatus, comprising:

a processor;

a memory having stored therein executable instructions of the processor;

wherein the processor is configured to perform the steps of the OLED screen ghosting reduction method of any of claims 1 to 8 via execution of the executable instructions.

11. A computer readable storage medium storing a program, characterized in that the program, when executed by a processor, implements the steps of the OLED screen ghosting reduction method of any of claims 1 to 8.