CN109743518B - Display screen protection method, television terminal, system and storage medium - Google Patents
Display screen protection method, television terminal, system and storage medium Download PDFInfo
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Abstract
The invention discloses a display screen protection method, a television terminal, a system and a storage medium, wherein the method comprises the following steps: calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area; judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold; if so, judging whether the duration or the duration frame number of which the absolute value is smaller than the first preset difference threshold value is correspondingly larger than or equal to the preset duration or the preset frame number; if so, acquiring the area average brightness of the current area within a preset time length or a preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value; if so, calculating the difference value between the average brightness of the area and the preset compensation value, and displaying the difference value as the display brightness of the current area. The invention realizes that the image brightness is reduced when the change of the television brightness signal is not obvious, thereby achieving the purpose of relieving the generation of the residual shadow and further prolonging the service life of the screen body.
Description
Technical Field
The invention relates to the technical field of intelligent televisions, in particular to a display screen protection method, a television terminal, a system and a storage medium.
Background
An Organic Light-Emitting Diode (OLED) television is an Organic self-luminous television that does not require a backlight, and compared with a common LED television, the OLED television has the advantages of high contrast, high resolution, wider viewing angle, high dynamic response time, and extreme lightness and thinness. However, the OLED television also has its own drawbacks, because it is a free light emission of each pixel, when it stays in a still picture or an incomplete still picture for a long time, it will generate a residual image, commonly called screen burn, and if the residual image phenomenon is seriously irreversible, the screen end will not be repaired by compensation.
In the existing OLED television, pixels in a screen are compensated, and a main chip of a television end performs pixel movement processing on a signal image when a picture is played, so that the occurrence probability of ghosting is reduced, or the static picture is prevented from appearing at the television end by enabling an interface without operation or an information source to enter a screen saver mode (different pictures or advertisements are broadcast in turn), so that the occurrence of the ghosting is avoided. The pixel movement of the television end only carries out the pixel movement in a limited range, the movement position is limited, the effect on pictures with large color blocks in the played images is not achieved, and the residual images can be generated after the picture stays for a long time. For some dynamic pictures such as TV dramas or comprehensive programs with small picture fluctuation, only a part of the pictures have large fluctuation, but the rest of the pictures have small change and cannot be used as static pictures, and the film source still has a high probability of generating ghost after being played for a long time.
Disclosure of Invention
The invention mainly aims to provide a display screen protection method, a television terminal, a system and a storage medium, and aims to solve the problem that the prior art cannot effectively process the residual image of an OLED television.
In order to achieve the above object, the present invention provides a display screen protection method, which is applied to a television terminal, wherein a display screen of the television terminal is provided with a plurality of regions, and the display screen protection method includes the following steps:
calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area;
judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames;
if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value;
and if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area.
Optionally, the step of obtaining the area average brightness of the current area within the preset duration or the preset number of frames and determining whether the area average brightness is greater than a first preset brightness threshold further includes:
if the average brightness of the area is less than or equal to a first preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold;
if the average brightness of the current frame in the current area is less than or equal to the first preset brightness threshold, not compensating the display brightness of the current area;
and if the average brightness of the current frame in the current area is greater than the first preset brightness threshold, displaying the first preset brightness threshold as the display brightness of the current area.
Optionally, the step of determining whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold further includes:
and if the absolute value is greater than or equal to a first preset difference threshold value, not compensating the display brightness of the current area.
Optionally, the step of determining whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold further includes:
if the absolute value is smaller than or equal to a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than or equal to the second preset difference threshold is larger than or equal to a preset duration or a preset number of frames;
if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a second preset brightness threshold value;
and if the area average brightness is larger than a second preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area.
Optionally, the step of obtaining the area average brightness of the current area within the preset duration or the preset number of frames and determining whether the area average brightness is greater than a second preset brightness threshold further includes:
if the average brightness of the area is less than or equal to a second preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the second preset brightness threshold;
if the average brightness of the current frame in the current area is less than or equal to the second preset brightness threshold, not compensating the display brightness of the current area;
and if the average brightness of the current frame in the current area is greater than the second preset brightness threshold, displaying the second preset brightness threshold as the display brightness of the current area.
Optionally, if the absolute value is less than or equal to a second preset difference threshold, the step of determining whether the duration or the number of the duration frames of which the absolute value is less than or equal to the second preset difference threshold is greater than or equal to a preset duration or a preset number of frames further includes:
and if the duration time or the duration frame number is less than the preset time or the preset frame number, not compensating the display brightness of the current area.
Optionally, if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, the step of determining whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames further includes:
and if the duration time or the duration frame number is less than the preset time or the preset frame number, not compensating the display brightness of the current area.
The present invention also provides a television terminal, including:
the calculating module is used for calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area;
the judging module is used for judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
the first obtaining module is used for judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to the preset duration or the preset number of frames or not if the absolute value is smaller than the first preset difference threshold and larger than the second preset difference threshold;
the second acquisition module is used for acquiring the area average brightness of the current area in the preset duration or the preset frame number if the duration or the duration frame number is greater than or equal to the preset duration or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value or not;
and the compensation module is used for calculating the difference value between the area average brightness and a preset compensation value if the area average brightness is greater than a first preset brightness threshold value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area.
In addition, to achieve the above object, the present invention also provides a display screen protection system, including: the display screen protection method comprises a memory, a processor and a display screen protection program stored on the memory and capable of running on the processor, wherein the steps of the display screen protection method are realized when the display screen protection program is executed by the processor.
In addition, to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores a display screen protection program, and the display screen protection program implements the steps of the display screen protection method when being executed by a processor.
The display screen protection method, the television terminal, the system and the storage medium provided by the invention calculate the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area; judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold; if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames; if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value; and if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area. The invention realizes that the image brightness is reduced when the OLED display signal changes inconspicuously, thereby achieving the purpose of alleviating the generation of residual shadows and further prolonging the service life of the OLED screen body.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a functional module of the television terminal according to the present invention;
fig. 3 is a flowchart illustrating a display screen protection method according to a first embodiment of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area; judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold; if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames; if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value; and if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area. The invention realizes that the image brightness is reduced when the OLED display signal changes inconspicuously, thereby achieving the purpose of alleviating the generation of residual shadows and further prolonging the service life of the OLED screen body.
In the prior art, the OLED television compensates pixels in the screen, and the main chip of the television end performs pixel moving processing on a signal image when the screen is played, so that the occurrence probability of the ghost is reduced, or the static picture is prevented from appearing at the television end by enabling an interface without operation or an information source to enter a screen saver mode (different pictures or advertisements are broadcast in turn), so that the occurrence of the ghost is avoided. The pixel movement of the television end only carries out the pixel movement in a limited range, the movement position is limited, the effect on pictures with large color blocks in the played images is not achieved, and the residual images can be generated after the picture stays for a long time. For some dynamic pictures such as TV dramas or comprehensive programs with small picture fluctuation, only a part of the pictures have large fluctuation, but the rest of the pictures have small change and cannot be used as static pictures, and the film source still has a high probability of generating ghost after being played for a long time.
The embodiment of the invention provides a solution, which can reduce the image brightness when the display signal changes inconspicuously, thereby relieving the time for generating the residual shadow.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is a television terminal.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that turns off the display screen and/or the backlight when the terminal device is moved to the ear. Of course, the terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operation terminal, a network communication module, a user interface module, and a display screen protection program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the display screen protection program stored in the memory 1005 and perform the following operations:
calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area;
judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames;
if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value;
and if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area.
Further, the processor 1001 may call the display screen protection program stored in the memory 1005, and further perform the following operations:
if the average brightness of the area is less than or equal to a first preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold;
if the average brightness of the current frame in the current area is less than or equal to the first preset brightness threshold, not compensating the display brightness of the current area;
and if the average brightness of the current frame in the current area is greater than the first preset brightness threshold, displaying the first preset brightness threshold as the display brightness of the current area.
Further, the processor 1001 may call the display screen protection program stored in the memory 1005, and further perform the following operations:
and if the absolute value is greater than or equal to a first preset difference threshold value, not compensating the display brightness of the current area.
Further, the processor 1001 may call the display screen protection program stored in the memory 1005, and further perform the following operations:
if the absolute value is smaller than or equal to a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than or equal to the second preset difference threshold is larger than or equal to a preset duration or a preset number of frames;
if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a second preset brightness threshold value;
and if the area average brightness is larger than a second preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area.
Further, the processor 1001 may call the display screen protection program stored in the memory 1005, and further perform the following operations:
if the average brightness of the area is less than or equal to a second preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the second preset brightness threshold;
if the average brightness of the current frame in the current area is less than or equal to the second preset brightness threshold, not compensating the display brightness of the current area;
and if the average brightness of the current frame in the current area is greater than the second preset brightness threshold, displaying the second preset brightness threshold as the display brightness of the current area.
Further, the processor 1001 may call the display screen protection program stored in the memory 1005, and further perform the following operations:
and if the duration time or the duration frame number is less than the preset time or the preset frame number, not compensating the display brightness of the current area.
Further, the processor 1001 may call the display screen protection program stored in the memory 1005, and further perform the following operations:
and if the duration time or the duration frame number is less than the preset time or the preset frame number, not compensating the display brightness of the current area.
In the technical solution provided by the present invention, the display screen protection terminal calls the display screen protection program stored in the memory 1005 through the processor 1001 to implement the steps of: calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area; judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold; if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames; if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value; and if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area. The invention realizes that the image brightness is reduced when the OLED display signal changes inconspicuously, thereby achieving the purpose of alleviating the generation of residual shadows and further prolonging the service life of the OLED screen body.
Referring to fig. 2, fig. 2 is a schematic diagram of a functional module of the television terminal according to the present invention.
The present invention also provides a television terminal, including:
a calculating module 10, configured to calculate an absolute value of a difference between an average luminance of a current frame in a current region and an average luminance of a previous frame in the current region;
a determining module 20, configured to determine whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
a first obtaining module 30, configured to determine whether a duration or a duration frame number of the absolute value smaller than a first preset difference threshold is correspondingly greater than or equal to a preset duration or a preset frame number if the absolute value is smaller than the first preset difference threshold and larger than a second preset difference threshold;
the second obtaining module 40 is configured to, if the duration or the duration frame number is greater than or equal to a preset duration or a preset frame number, obtain an area average brightness of a current area within the preset duration or the preset frame number, and determine whether the area average brightness is greater than a first preset brightness threshold;
and the compensation module 50 is configured to calculate a difference between the area average brightness and a preset compensation value if the area average brightness is greater than a first preset brightness threshold, and display the difference between the area average brightness and the preset compensation value as the display brightness of the current area.
The specific implementation of the television terminal of the present invention is substantially the same as the embodiments of the display screen protection method, and will not be described herein again.
The present invention provides a storage medium storing one or more programs, the one or more programs being further executable by one or more processors for implementing the steps of the display screen protection method according to any one of the above.
The specific implementation of the storage medium of the present invention is substantially the same as the embodiments of the display screen protection method, and will not be described herein again.
Based on the hardware structure, the embodiment of the display screen protection method is provided.
Referring to fig. 3, fig. 3 is a flowchart illustrating a display screen protection method according to a first embodiment of the present invention.
As shown in fig. 3, a first embodiment of the present invention provides a display screen protection method, where the display screen protection method is applied to a television terminal, a display screen of the television terminal is provided with a plurality of regions, and the display screen protection method includes the following steps:
step S1, calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area;
an Organic Light-Emitting Diode (OLED) television is an Organic self-luminous television that does not require a backlight, and compared with a common LED television, the OLED television has the advantages of high contrast, high resolution, wider viewing angle, high dynamic response time, and extreme lightness and thinness. However, the OLED television also has its own drawbacks, because it is a free light emission of each pixel, when it stays in a still picture or an incomplete still picture for a long time, it will generate a residual image, commonly called screen burn, and if the residual image phenomenon is seriously irreversible, the screen end will not be repaired by compensation.
In the existing OLED television, pixels in a screen are compensated, and a main chip of a television end performs pixel movement processing on a signal image when a picture is played, so that the occurrence probability of ghosting is reduced, or the static picture is prevented from appearing at the television end by enabling an interface without operation or an information source to enter a screen saver mode (different pictures or advertisements are broadcast in turn), so that the occurrence of the ghosting is avoided. The pixel movement of the television end only carries out the pixel movement in a limited range, the movement position is limited, the effect on pictures with large color blocks in the played images is not achieved, and the residual images can be generated after the picture stays for a long time. For some dynamic pictures such as TV dramas or comprehensive programs with small picture fluctuation, only a part of the pictures have large fluctuation, but the rest of the pictures have small change and cannot be used as static pictures, and the film source still has a high probability of generating ghost after being played for a long time.
It can be understood that the display screen protection method provided by the invention is applicable to the technical field of intelligent televisions.
In this embodiment, under the existing television framework, the display screen of the television terminal is divided into a plurality of areas, the more the divided areas are, the finer the detection effect on the image is, further, the more pointed the brightness compensation on the areas is, and the better the ghost elimination effect is.
Then, the picture brightness signals of the plurality of areas are simultaneously and respectively monitored through a main chip of the television terminal, the average brightness of the current frame of the current area and the average brightness of the previous frame of the current area are calculated in real time, and then the absolute value of the difference between the average brightness of the current frame of the current area and the average brightness of the previous frame of the current area is calculated. The current region may be any one of several regions.
Wherein, the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area indicates the intensity of the image brightness change. The larger the absolute value is, the larger the change of the image brightness is, and the less the afterimage is generated; the smaller the absolute value, the smaller the change in image brightness, the more likely the afterimage is generated, and the more necessary it is to compensate for the image brightness, thereby reducing the possibility of the afterimage generation.
Step S2, determining whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
after the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area is obtained, whether the absolute value is smaller than a first preset difference threshold value and larger than a second preset difference threshold value is judged.
If the absolute value is greater than or equal to the first preset difference threshold, the image brightness of the area is changed violently, and the ghost is not easy to generate, so that the display brightness of the current area is not compensated; if the absolute value is smaller than the first preset difference threshold and larger than the second preset difference threshold, the change fluctuation of the image brightness of the area is moderate and tends to be smooth, but the possibility of generating ghost still exists, and the ghost needs to be further judged; if the absolute value is less than or equal to the second preset difference threshold, it indicates that the image brightness change of the region is small, which may easily generate an afterimage, and further determination is required.
Wherein the first preset difference threshold is greater than the second preset difference threshold.
Step S3, if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames;
if the absolute value is smaller than the first preset difference threshold and larger than the second preset difference threshold, it is indicated that the change fluctuation of the image brightness of the area is moderate and tends to be smooth, but the possibility of generating ghost still exists, and further judgment needs to be performed on the ghost.
Specifically, the further determining step includes: and acquiring the duration or the continuous frame number of which the absolute value is smaller than a first preset difference threshold, and judging whether the duration or the continuous frame number is larger than or equal to a preset duration or a preset frame number.
In this embodiment, as long as the absolute value is smaller than the first preset difference threshold, the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is calculated in an accumulated manner, and when the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is obtained, whether the duration or the number of the duration frames is greater than or equal to the preset duration or the preset number of frames is determined. The accumulated value is continuously and uninterruptedly calculated, and if the absolute value of a certain frame in the middle is larger than or equal to a first preset difference threshold value, the accumulated value is reset, namely the duration or the number of the continuous frames is reset.
The user or the operation and maintenance personnel can set the preset duration or the preset frame number according to the needs, and the embodiment is not limited.
Step S4, if the duration time or the duration frame number is larger than or equal to the preset time or the preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is larger than a first preset brightness threshold value;
if the duration time or the duration frame number is judged to be greater than or equal to the preset time or the preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value.
If the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value as the display brightness of the current area;
if the average brightness of the area is less than or equal to a first preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold, and if the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold, not compensating the display brightness of the current area; and if the average brightness of the current frame in the current area is greater than the first preset brightness threshold, displaying the first preset brightness threshold as the display brightness of the current area.
Step S5, if the area average brightness is greater than the first preset brightness threshold, calculating a difference between the area average brightness and a preset compensation value, and displaying the difference between the area average brightness and the preset compensation value as the display brightness of the current area.
In this embodiment, if the area average brightness is greater than the first preset brightness threshold, a difference between the area average brightness and a preset compensation value is calculated, and the difference is used as the display brightness of the current area for displaying.
The user or the operation and maintenance personnel may set the magnitude of the preset compensation value according to the needs, and this embodiment is not limited.
To aid understanding, a specific example is listed: dividing a display screen of the television terminal into M multiplied by N areas, wherein each area is marked as MiNj, i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N; dividing the brightness of a signal transmitted to a screen body into 0-255 levels, wherein the 0 level corresponds to the darkest and the 255 level corresponds to the whitest; a first preset difference threshold value not less than 130 and not more than 255, and a second preset difference threshold value not less than 80 and less than 130; the number of the preset frames is more than or equal to 30 and less than or equal to 200; the first preset brightness threshold value is more than or equal to 100 and less than or equal to 140; the preset compensation value is more than or equal to 1 and less than or equal to 10.
If the first preset difference threshold value is 150, the second preset difference threshold value is 100, the preset frame number is 30, the first preset brightness threshold value is 120, the preset compensation value is 1, an absolute value Y of a difference between an average brightness MiNj of a current frame in the current region and an average brightness Mi 'Nj' of a previous frame in the current region is calculated, if Y is less than 150 and greater than 100, and the accumulated continuous frame number is equal to 30 frames, the current frame is a 30 th frame, and the average brightness X of the current region in the 30 frames is greater than 120, the difference between the average brightness of the region and the preset compensation value is calculated to be X-1, and X-1 is used as the display brightness of the current region to be displayed.
By the display screen protection method provided by the embodiment, the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area is calculated; judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold; if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames; if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value; and if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area. The invention realizes that the image brightness is reduced when the OLED display signal changes inconspicuously, thereby achieving the purpose of alleviating the generation of residual shadows and further prolonging the service life of the OLED screen body.
Further, based on the first embodiment shown in fig. 3, a second embodiment of the display screen protection method according to the present invention is provided, in this embodiment, after step S2, the method further includes:
in step S21, if the absolute value is greater than or equal to the first preset difference threshold, the display brightness of the current area is not compensated.
In this embodiment, the absolute value of the difference between the average brightness of the current frame in the current region and the average brightness of the previous frame in the current region indicates the intensity of the image brightness variation. The larger the absolute value is, the larger the change of the image brightness is, and the less the afterimage is generated; the smaller the absolute value, the smaller the change in image brightness, the more likely the afterimage is generated, and the more necessary it is to compensate for the image brightness, thereby reducing the possibility of the afterimage generation.
After the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area is obtained, if the absolute value is judged to be greater than or equal to the first preset difference threshold value, the image brightness of the area is changed violently, and afterimages are not easy to generate, so that the display brightness of the current area is not compensated.
Further, step S2 is followed by:
step S22, if the absolute value is less than or equal to a second preset difference threshold, determining whether the duration or the number of the duration frames of which the absolute value is less than or equal to the second preset difference threshold is greater than or equal to a preset duration or a preset number of frames;
step S23, if the duration time or the duration frame number is larger than or equal to the preset time or the preset frame number, obtaining the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is larger than a second preset brightness threshold value;
step S24, if the area average brightness is greater than a second preset brightness threshold, calculating a difference between the area average brightness and a preset compensation value, and displaying the difference between the area average brightness and the preset compensation value as the display brightness of the current area.
In this embodiment, if the absolute value of the difference between the average brightness of the current frame in the current region and the average brightness of the previous frame in the current region is less than or equal to the second preset difference threshold, it indicates that the image brightness change of the region is small, which may easily generate a residual image, and further determination is required.
Specifically, if the absolute value is less than or equal to a second preset difference threshold, determining whether the duration or the number of the duration frames of which the absolute value is less than or equal to the second preset difference threshold is greater than or equal to a preset duration or a preset number of frames; if the duration time or the duration frame number is greater than or equal to the preset time or the preset frame number correspondingly, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a second preset brightness threshold value or not; and if the area average brightness is larger than the second preset brightness threshold, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value as the display brightness of the current area.
And the second preset brightness threshold value is smaller than the first preset brightness threshold value.
Further, step S22 is followed by:
step S221, if the duration or the duration frame number is less than the preset duration or the preset frame number, the display brightness of the current area is not compensated.
If the absolute value is less than or equal to a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is less than or equal to the second preset difference threshold is greater than or equal to a preset duration or a preset number of frames; if the duration or the duration frame number is less than the preset duration or the preset frame number, the duration is short, the possibility of generating the afterimage is low, and therefore the display brightness of the current area is not compensated.
Further, step S23 is followed by:
step S231, if the area average brightness is less than or equal to a second preset brightness threshold, determining whether the average brightness of the current frame in the current area is less than or equal to the second preset brightness threshold;
step S232, if the average brightness of the current frame in the current region is less than or equal to the second preset brightness threshold, not compensating the display brightness of the current region;
in step S233, if the average brightness of the current frame in the current region is greater than the second preset brightness threshold, the second preset brightness threshold is used as the display brightness of the current region for displaying.
Specifically, if the duration or the duration frame number is greater than or equal to the preset duration or the preset frame number, obtaining the average brightness of the area of the current area within the preset duration or the preset frame number, and determining whether the average brightness of the area is greater than a second preset brightness threshold, where if the average brightness of the area is less than or equal to the second preset brightness threshold, it is indicated that the average brightness of the current area within the preset duration or the preset frame number is lower, but the average cannot represent a case, and then determining whether the average brightness of the current area is less than or equal to the second preset brightness threshold, compensating for the uncompensation less than or equal to the second preset brightness threshold, which is equal to or greater than the second preset brightness threshold, and displaying the second preset brightness threshold as the display brightness of the current area.
By the display screen protection method provided by the embodiment, the current area with the absolute value within the range greater than or equal to the first preset difference threshold value and less than or equal to the second preset difference threshold value is further judged, and the accuracy of brightness compensation is fully ensured.
Further, based on the first embodiment shown in fig. 3, a third embodiment of the display screen protection method according to the present invention is provided, in this embodiment, after step S4, the method further includes:
step S41, if the average brightness of the area is less than or equal to a first preset brightness threshold, determining whether the average brightness of the current frame in the current area is less than or equal to the first preset brightness threshold;
step S42, if the average brightness of the current frame in the current region is less than or equal to the first preset brightness threshold, not compensating the display brightness of the current region;
step S43, if the average brightness of the current frame in the current region is greater than the first preset brightness threshold, displaying the first preset brightness threshold as the display brightness of the current region.
In this embodiment, if it is determined that the duration or the duration frame number is greater than or equal to the preset duration or the preset frame number, the area average brightness of the current area within the preset duration or the preset frame number is obtained, and whether the area average brightness is greater than a first preset brightness threshold is determined.
If the average brightness of the area is less than or equal to a first preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold, and if the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold, not compensating the display brightness of the current area; and if the average brightness of the current frame in the current area is greater than the first preset brightness threshold, displaying the first preset brightness threshold as the display brightness of the current area.
Further, step S3 is followed by:
and step S31, if the duration or the number of the duration frames is less than the preset duration or the preset number of frames, not compensating the display brightness of the current area.
If the absolute value is smaller than the first preset difference threshold and larger than the second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is larger than or equal to the preset duration or the preset number of frames, and if the duration or the number of the duration frames is smaller than the preset duration or the preset number of frames, not compensating the display brightness of the current area.
By the technical scheme provided by the embodiment of the invention, the problem that in the prior art, the occurrence probability of the residual image is reduced by compensating the pixels in the screen of the OLED television and simultaneously carrying out pixel movement processing on the signal image by the main chip of the television end when the image is played is solved, or the static image is prevented from appearing at the television end by enabling the interface without operation or information source to enter a screen saver mode (different images or advertisements are broadcast in turn), so that the occurrence of the residual image is avoided. The pixel movement of the television end only carries out the pixel movement in a limited range, the movement position is limited, the effect on pictures with large color blocks in the played images is not achieved, and the residual images can be generated after the picture stays for a long time. For some dynamic pictures such as TV dramas or comprehensive programs with small picture fluctuation, only a part of the pictures have large fluctuation, but the rest of the pictures have small change and cannot be used as static pictures, and the film source still has a high probability of generating ghost after being played for a long time.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A display screen protection method is applied to a television terminal, a display screen of the television terminal is provided with a plurality of areas, and the display screen protection method comprises the following steps:
calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area;
judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
if the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames;
if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value;
if the area average brightness is larger than a first preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area;
dividing the display screen of the television terminal into M multiplied by N areas, wherein each area is marked as MiNj, i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N; dividing the brightness of a signal transmitted to a screen body into 0-255 levels, wherein the 0 level corresponds to the darkest and the 255 level corresponds to the whitest; a first preset difference threshold value not less than 130 and not more than 255, and a second preset difference threshold value not less than 80 and less than 130; the number of the preset frames is more than or equal to 30 and less than or equal to 200; the first preset brightness threshold value is more than or equal to 100 and less than or equal to 140; the preset compensation value is more than or equal to 1 and less than or equal to 10.
2. The method for protecting a display screen according to claim 1, wherein the step of obtaining the average brightness of the area of the current area within the preset duration or the preset number of frames and determining whether the average brightness of the area is greater than a first preset brightness threshold value further comprises:
if the average brightness of the area is less than or equal to a first preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the first preset brightness threshold;
if the average brightness of the current frame in the current area is less than or equal to the first preset brightness threshold, not compensating the display brightness of the current area;
and if the average brightness of the current frame in the current area is greater than the first preset brightness threshold, displaying the first preset brightness threshold as the display brightness of the current area.
3. The display screen protection method of claim 1, wherein the step of determining whether the absolute value is less than a first preset difference threshold and greater than a second preset difference threshold further comprises:
and if the absolute value is greater than or equal to a first preset difference threshold value, not compensating the display brightness of the current area.
4. The display screen protection method of claim 1, wherein the step of determining whether the absolute value is less than a first preset difference threshold and greater than a second preset difference threshold further comprises:
if the absolute value is smaller than or equal to a second preset difference threshold, judging whether the duration or the number of the duration frames of which the absolute value is smaller than or equal to the second preset difference threshold is correspondingly larger than or equal to a preset duration or a preset number of frames;
if the duration time or the duration frame number is correspondingly greater than or equal to a preset time or a preset frame number, acquiring the area average brightness of the current area in the preset time or the preset frame number, and judging whether the area average brightness is greater than a second preset brightness threshold value;
and if the area average brightness is larger than a second preset brightness threshold value, calculating a difference value between the area average brightness and a preset compensation value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area.
5. The method for protecting a display screen according to claim 4, wherein the step of obtaining the average brightness of the area of the current area within the preset duration or the preset number of frames and determining whether the average brightness of the area is greater than a second preset brightness threshold value further comprises:
if the average brightness of the area is less than or equal to a second preset brightness threshold, judging whether the average brightness of the current frame of the current area is less than or equal to the second preset brightness threshold;
if the average brightness of the current frame in the current area is less than or equal to the second preset brightness threshold, not compensating the display brightness of the current area;
and if the average brightness of the current frame in the current area is greater than the second preset brightness threshold, displaying the second preset brightness threshold as the display brightness of the current area.
6. The method for protecting a display screen according to claim 4, wherein the step of determining whether the duration or the number of the duration frames of which the absolute value is less than or equal to the second preset difference threshold is greater than or equal to the preset duration or the preset number of frames further comprises, if the absolute value is less than or equal to the second preset difference threshold:
and if the duration time or the duration frame number is less than the preset time or the preset frame number, not compensating the display brightness of the current area.
7. The method for protecting a display screen according to claim 1, wherein the step of determining whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold corresponds to or is greater than or equal to the preset duration or the preset number of frames further comprises, if the absolute value is smaller than the first preset difference threshold and is greater than the second preset difference threshold:
and if the duration time or the duration frame number is less than the preset time or the preset frame number, not compensating the display brightness of the current area.
8. A television terminal, characterized in that the television terminal comprises:
the calculating module is used for calculating the absolute value of the difference between the average brightness of the current frame in the current area and the average brightness of the previous frame in the current area;
the judging module is used for judging whether the absolute value is smaller than a first preset difference threshold and larger than a second preset difference threshold;
the first obtaining module is used for judging whether the duration or the number of the duration frames of which the absolute value is smaller than the first preset difference threshold is correspondingly larger than or equal to the preset duration or the preset number of frames or not if the absolute value is smaller than the first preset difference threshold and larger than the second preset difference threshold;
the second acquisition module is used for acquiring the area average brightness of the current area in the preset duration or the preset frame number if the duration or the duration frame number is greater than or equal to the preset duration or the preset frame number, and judging whether the area average brightness is greater than a first preset brightness threshold value or not;
the compensation module is used for calculating the difference value between the area average brightness and a preset compensation value if the area average brightness is larger than a first preset brightness threshold value, and displaying the difference value between the area average brightness and the preset compensation value as the display brightness of the current area;
dividing the display screen of the television terminal into M multiplied by N areas, wherein each area is marked as MiNj, i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N; dividing the brightness of a signal transmitted to a screen body into 0-255 levels, wherein the 0 level corresponds to the darkest and the 255 level corresponds to the whitest; a first preset difference threshold value not less than 130 and not more than 255, and a second preset difference threshold value not less than 80 and less than 130; the number of the preset frames is more than or equal to 30 and less than or equal to 200; the first preset brightness threshold value is more than or equal to 100 and less than or equal to 140; the preset compensation value is more than or equal to 1 and less than or equal to 10.
9. A display screen protection system, comprising: memory, a processor and a display protection program stored on the memory and executable on the processor, the display protection program when executed by the processor implementing the steps of the display protection method according to any one of claims 1 to 7.
10. A storage medium having a display screen protection program stored thereon, the display screen protection program when executed by a processor implementing the steps of the display screen protection method according to any one of claims 1 to 7.
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| CN111050224A (en) * | 2019-12-27 | 2020-04-21 | 深圳创维－Rgb电子有限公司 | Processing method for preventing residual image of television, television and storage medium |
| CN111294651A (en) * | 2020-02-05 | 2020-06-16 | 深圳创维－Rgb电子有限公司 | Still picture anti-afterimage method and device based on play data stream and storage medium |
| CN111429840B (en) * | 2020-03-16 | 2022-05-17 | 上海顺久电子科技有限公司 | Display device and brightness adjusting method thereof |
| CN111432257A (en) * | 2020-03-26 | 2020-07-17 | 海信视像科技股份有限公司 | Method for starting screen protection of display equipment and display equipment |
| CN111880886B (en) * | 2020-07-31 | 2024-04-30 | 北京小米移动软件有限公司 | Screen protection picture selection method and device and storage medium |
| CN113781957B (en) * | 2021-09-09 | 2023-04-25 | 海信视像科技股份有限公司 | Method for preventing screen burn of display device and display device |
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