CN114420061B - Screen brightness adjusting method and device, storage medium and display device - Google Patents
Screen brightness adjusting method and device, storage medium and display device Download PDFInfo
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Abstract
The embodiment of the application provides a screen brightness adjusting method, a device, a storage medium and display equipment, wherein the method is applied to the display equipment and comprises the following steps: acquiring current ambient light intensity in the environment where the display device is located; determining a spatial filter corresponding to the current ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is; and adjusting the brightness of the backlight subarea of the display equipment based on the spatial filter, so that the brightness difference change of the backlight subarea before and after the brightness adjustment is matched with the visual requirement of human eyes under the environment light intensity change. According to the method and the device, the ambient light intensity in the environment where the display device is located is obtained, then the convergence of the spatial filter is determined based on the ambient light intensity, and finally the brightness difference of each backlight partition is adjusted through the spatial filter, so that the screen picture of the display device is matched with the visual demands of human eyes under different ambient light intensities.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method and apparatus for adjusting brightness of a screen, a storage medium, and a display device.
Background
In the prior art, the brightness convergence degree of each backlight partition of a screen on a display device is the same. Because the sensitivity of human eyes to bright and dark details is different when the intensity of the ambient light of the environment where the screen is located is not consistent, the picture feeling given to the human is not good if the brightness convergence degree of each area on the screen is the same.
Accordingly, the prior art has drawbacks and needs to be improved and developed.
Disclosure of Invention
The embodiment of the application provides a screen brightness adjusting method, a device, a storage medium and display equipment, wherein brightness difference of backlight partitions of the display equipment can be adjusted according to ambient light intensity, so that a screen picture of the display equipment is matched with visual demands of human eyes under different ambient light intensities.
In the method for adjusting screen brightness according to the embodiment of the present application, the determining the spatial filter corresponding to the current ambient light intensity includes:
acquiring a corresponding relation between a preset ambient light intensity range and a spatial filter coefficient;
determining a target ambient light intensity range in which the current ambient light intensity is located;
determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation;
And determining the spatial filter coefficient as the spatial filter coefficient corresponding to the current ambient light intensity.
In the method for adjusting screen brightness according to the embodiment of the present application, the determining the spatial filter corresponding to the current ambient light intensity includes:
acquiring a preset mapping relation between a spatial filter coefficient and the intensity of ambient light;
and determining a spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation.
In the screen brightness adjustment method according to the embodiment of the present application, the mapping relationship includes a first mapping relationship between ambient light intensity and mapped light intensity, and a second mapping relationship between mapped light intensity and the spatial filter coefficient;
the determining the spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation includes:
mapping the current ambient light intensity into a preset light intensity range based on the first mapping relation to obtain mapped light intensity, wherein the preset light intensity range is smaller than an ambient light intensity reference change range;
and determining each spatial filter coefficient under the mapped light intensity based on a second mapping relation between the mapped light intensity and the spatial filter coefficient.
In the method for adjusting screen brightness according to the embodiment of the present application, the adjusting the brightness of the backlight partition of the display device based on the spatial filter, so that the brightness difference between the backlight partition before and after the brightness adjustment changes, matches the visual requirement of the human eye under the environment light intensity change, includes:
based on the spatial filter, adjusting the illumination intensity of each backlight unit corresponding to each adjacent backlight partition, thereby adjusting the brightness of the backlight partition of the display device, so that the brightness difference between the backlight partition before and after brightness adjustment changes, and the vision requirement of human eyes under the environment light intensity change is matched.
In the method for adjusting screen brightness according to the embodiment of the present application, after obtaining the current ambient light intensity in the environment where the display device is located, the method further includes:
and carrying out global adjustment on the brightness of each backlight partition based on the current ambient light intensity, so that the brightness of each backlight partition is consistent and meets the preset brightness requirement.
In the method for adjusting screen brightness according to the embodiment of the present application, the adjusting the brightness of the backlight partition of the display device based on the spatial filter, so that the brightness difference between the backlight partition before and after the brightness adjustment changes, matches the visual requirement of the human eye under the environment light intensity change, includes:
Based on the spatial filter, the brightness of part of the backlight subareas is adjusted, so that the brightness difference changes of the backlight subareas before and after brightness adjustment, and the vision requirement of human eyes under the environment light intensity change is matched.
The embodiment of the application also provides a screen brightness adjusting device, which comprises:
the acquisition module is used for acquiring the current ambient light intensity in the environment where the display equipment is located;
a determining module, configured to determine a spatial filter corresponding to the current ambient light intensity, where the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is;
and the adjusting module is used for adjusting the brightness of the backlight subarea of the display equipment based on the spatial filter, so that the brightness difference of the backlight subareas is changed before and after the brightness adjustment, and the visual requirement of human eyes under the environment light intensity change is matched.
The embodiment of the application also provides a computer readable storage medium, in which a computer program is stored, which when run on a computer, causes the computer to execute the screen brightness adjustment method according to any one of the embodiments.
The embodiment of the application also provides a display device, which comprises a processor and a memory, wherein the memory stores a computer program, and the processor is used for executing the screen brightness adjusting method according to any one of the embodiments by calling the computer program stored in the memory.
According to the method and the device, the ambient light intensity in the environment where the display device is located is obtained, then the convergence of the spatial filter is determined based on the ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is, and finally the brightness difference of each backlight partition is adjusted through the spatial filter, so that the screen picture of the display device is matched with the visual requirements of human eyes under different ambient light intensities.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for adjusting screen brightness according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a spatial filter with a scale of 5 according to an embodiment of the present application.
Fig. 3 is a graph of gaussian (normal) distribution function curves and filter coefficients Ar according to an embodiment of the present application.
Fig. 4 shows gaussian (normal) distribution function curves and filter coefficients Ar at different ambient light intensities according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a screen brightness adjusting device according to an embodiment of the present application.
Fig. 6 is a schematic diagram of another structure of a screen brightness adjusting device according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.
The embodiment of the application provides a screen brightness adjusting method, which can be applied to display equipment. The display device can be a display device such as a mobile phone, a tablet computer and the like.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for adjusting brightness of a screen according to an embodiment of the present application. The screen brightness adjustment method may include the steps of:
In some embodiments, the intensity of ambient light in the environment of the display device may be obtained by a light sensor disposed above the screen of the display device.
In some embodiments, the determining the spatial filter corresponding to the current ambient light intensity includes:
acquiring a corresponding relation between a preset ambient light intensity range and a spatial filter coefficient;
determining a target ambient light intensity range in which the current ambient light intensity is located;
determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation;
and determining the spatial filter coefficient as the spatial filter coefficient corresponding to the current ambient light intensity.
For example, when the preset ambient light intensity a ranges from 0.00001cd to 0.01cd, the corresponding spatial filter coefficient is A1, when the preset ambient light intensity a ranges from 0.01cd to 10cd, the corresponding spatial filter coefficient is A2, and if the current ambient light intensity is 1cd, the target ambient light intensity range where the current ambient light intensity is located is from 0.01 to 10, and the spatial filter coefficient corresponding to the previous ambient light intensity is A2.
In some embodiments, the determining the spatial filter corresponding to the current ambient light intensity includes:
acquiring a preset mapping relation between a spatial filter coefficient and the intensity of ambient light;
and determining a spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation.
For example, the preset mapping relationship between the spatial filter coefficient and the ambient light intensity is: when the ambient light intensity is 1cd, the corresponding spatial filter coefficient is A1; when the ambient light intensity is 100cd, the corresponding spatial filter coefficient is A2; when the ambient light intensity is 200cd, the corresponding spatial filter coefficient is A3. The spatial filter coefficient corresponding to the current ambient light intensity may be determined based on the preset mapping relationship.
In some embodiments, the mapping relationship includes a first mapping relationship of ambient light intensity and mapped light intensity, and a second mapping relationship of mapped light intensity and the spatial filter coefficients;
the determining the spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation includes:
mapping the current ambient light intensity into a preset light intensity range based on the first mapping relation to obtain mapped light intensity, wherein the preset light intensity range is smaller than an ambient light intensity reference change range;
And determining each spatial filter coefficient under the mapped light intensity based on a second mapping relation between the mapped light intensity and the spatial filter coefficient.
For example, the preset light intensity range is 0.1 cd-10000 cd, and the reference change range of the ambient light intensity is 0.00001 cd-100000 cd. Within a preset light intensity range, the first mapping relationship is as follows: the ambient light intensity is 1cd, and the mapped light intensity is 0.001cd; the ambient light intensity was 2000cd and the mapped light intensity was 2cd. The second mapping relation is: the intensity of the light after mapping is 0.001cd, and the coefficient of the spatial filter is A1; the intensity of the mapped light is 2cd, and the spatial filter coefficient is A2. The current ambient light intensity may be mapped into a preset light intensity range based on the first mapping relationship to obtain a mapped light intensity, and then each spatial filter coefficient under the mapped light intensity is determined based on the second mapping relationship between the mapped light intensity and the spatial filter coefficient. For example, the mapped light intensity is determined to be 0.001cd from the current ambient light intensity of 1cd, and the spatial filter coefficient is determined to be A1 from the mapped light intensity of 0.001 cd.
In the Local Dimming algorithm, the Spatial Filter (Spatial Filter) is generally shown in fig. 2, and is a square array formed by the same number of coefficient rows and coefficient columns D, where D is the dimension of the Filter. In a spatial filter, the coefficient A0 is typically centered and then the coefficients A1, A2, … … are sequentially flared out around a circle of A0. While the coefficient A0 generally requires uniqueness, it is known that D must be odd at this time. As shown in fig. 2, the coefficient A0 is unique and centered, A1 forms a first circle around A0, and A2 forms a second circle around A1, constituting a spatial filter of scale 5.
In the spatial filter, the values of the coefficients A0, A1, A2 … … are generally sequentially smaller, and when they follow the gaussian (normal) distribution function of the following formula 1, they are called gaussian spatial filters.
In the formula 1, r >0 is a variable, and when the variable is an integer, the number of turns where the coefficient Ar is located is represented; c >0 is a constant, and is a convergence coefficient of the coefficient Ar, and the larger the value thereof, the stronger the convergence of Ar. One curve of equation 1 is shown in fig. 3 below, where the larger the convergence coefficient C, the smaller Ar/A0 will be, indicating that Ar has stronger convergence, when r (r=1, 2.) is set.
Whereas the human eye has the following characteristics. When the ambient light is weak, human eyes are sensitive to both bright and dark details, ar is required to have weak convergence, namely the brightness difference of backlight subareas of each backlight is reduced, the transition of picture levels is smooth and natural, and the negative influence of Local Dimming (a subarea backlight control technology, chinese is area backlight, matrix backlight and the like) can be reduced as much as possible; when the ambient light is strong, the human eyes are insensitive to bright and dark details, ar is required to have strong convergence, namely, the backlight difference of each backlight partition is increased, the details are highlighted by stretching the picture level, and therefore the technical advantage of Local Dimming is fully exerted.
Let the convergence coefficient C be a continuous monotonically increasing function of the ambient light intensity a, namely:
c=f (a) 2
further, it is assumed that:
C＝a B/2 4. The method is to
In formula 4, B is a constant, and the range of values is generally (0, 2), which is used to limit the range of C. Because the ambient light intensity a in nature ranges from 0.00001 lumen to 100000 lumen, the magnitude span is too large, and the convergence factor C needs to be limited to a small variation range by the parameter B. For example, in equation 4, if the value ranges of a are (0.00001, 100000) and B is 1, 0.2, and 0.1, respectively, the value ranges of corresponding C are (0.003, 316.2), (0.316,3.162), and (0.562,1.778), respectively. The smaller the value of B, the smaller the value range of the corresponding C, so that the change range of the coefficient Ar of the Gaussian spatial filter is smaller, and finally, the required Local Dimming effect is ensured to be stably presented when the ambient light intensity is severely changed.
Formula 4 is carried over into formula 1 to yield:
when B is constant and the ambient light intensity a changes, it is assumed that a has three states a1, a2 and a3, and a 1< a 2< a3 are satisfied. From equation 4, the corresponding convergence coefficients C1, C2, and C3 can be obtained, and it is easy to see that C1< C2< C3 should be. Then figure 4 is plotted according to equation 5 as follows.
In fig. 4, the curves corresponding to the ambient light intensities a1, a2, and a3 are the curve 1, the curve 2, and the curve 3, respectively. When r (r=1, 2 … …) is constant (e.g., 1), the values of Ar/A0 in the curves 1, 2, and 3 decrease in order, that is, the convergence increases in order. Further, the present example basically satisfies the above-described requirement that the spatial filter coefficient Ar has a stronger convergence as the ambient light intensity a is larger.
And step 103, adjusting the brightness of the backlight subarea of the display equipment based on the spatial filter, so that the brightness difference of the backlight subareas is changed before and after the brightness adjustment, and the visual requirement of human eyes under the environment light intensity change is matched.
The adjusting the brightness of the backlight partitions means adjusting the brightness of each adjacent backlight partition, so that the brightness of each adjacent backlight partition is different and has a certain difference, and a screen picture of the display device is matched with the visual requirement of human eyes under different ambient light intensities.
When the ambient light is weaker, human eyes are sensitive to both bright and dark details, the brightness difference of the backlight of each adjacent backlight partition is required to be reduced, the transition of the picture level is smooth and natural, and the negative influence of matrix backlight is reduced as much as possible; when the ambient light is strong, the human eyes are insensitive to bright and dark details, the brightness difference of each adjacent backlight partition is required to be increased, and the details are highlighted by stretching the picture level.
For example, when the current ambient light intensity is 1cd, the human eyes are sensitive to both bright details and dark details, the brightness difference of each adjacent backlight partition is required to be reduced, the transition of the picture level is smooth and natural, and then the brightness difference of the adjacent backlight partition can be set to be 0.1cd; when the current ambient light intensity is 1000cd, human eyes are insensitive to bright details and dark details, the brightness difference of each adjacent backlight partition is required to be increased, the picture level is stretched to highlight details, and the brightness difference of the adjacent backlight partition can be 5cd.
In some embodiments, the adjusting the brightness of the backlight partition of the display device based on the spatial filter, such that the brightness difference between the backlight partition before and after the brightness adjustment changes, matches the visual requirement of human eyes under the change of the ambient light intensity, includes:
based on the spatial filter, adjusting the illumination intensity of each backlight unit corresponding to each adjacent backlight partition, thereby adjusting the brightness of the backlight partition of the display device, so that the brightness difference between the backlight partition before and after brightness adjustment changes, and the vision requirement of human eyes under the environment light intensity change is matched.
That is, the brightness of each adjacent backlight section is adjusted by adjusting the illumination intensity of each backlight unit.
In some embodiments, after the obtaining the current ambient light intensity in the environment where the display device is located, the method further includes:
and carrying out global adjustment on the brightness of each backlight partition based on the current ambient light intensity, so that the brightness of each backlight partition is consistent and meets the preset brightness requirement.
Before the brightness of each adjacent backlight partition is regulated to generate difference, the brightness of each backlight partition is globally regulated so that the brightness of each backlight partition is consistent and meets the preset brightness requirement, and the preset brightness requirement can be that the brightness of the backlight partition is matched with the ambient light intensity, so that human eyes cannot be stimulated.
In some embodiments, the adjusting the brightness of the backlight partition of the display device based on the spatial filter, such that the brightness difference between the backlight partition before and after the brightness adjustment changes, matches the visual requirement of human eyes under the change of the ambient light intensity, includes:
based on the spatial filter, the brightness of part of the backlight subareas is adjusted, so that the brightness difference changes of the backlight subareas before and after brightness adjustment, and the vision requirement of human eyes under the environment light intensity change is matched.
The brightness of each backlight partition is globally adjusted in advance, so that the brightness of each backlight partition is consistent and meets the preset brightness requirement, and therefore, the brightness of part of backlight partitions is adjusted, the brightness difference of adjacent backlight partitions is generated, and the visual requirement of the screen picture for matching the human eyes under the current ambient light intensity is met.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein in detail.
In particular, the present application is not limited by the order of execution of the steps described, and certain steps may be performed in other orders or concurrently without conflict.
As can be seen from the above, in the screen brightness adjustment method provided by the embodiment of the present application, by acquiring the ambient light intensity in the environment where the display device is located, then determining the convergence of the spatial filter based on the ambient light intensity, where the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is, and finally adjusting the brightness difference of each backlight partition through the spatial filter, so that the screen image of the display device matches the visual requirement of human eyes under different ambient light intensities.
The embodiment of the application also provides a screen brightness adjusting device, and the screen brightness adjusting method and device can be integrated in the display equipment. The display device can be a display device such as a mobile phone, a tablet personal computer and the like.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a screen brightness adjusting device according to an embodiment of the present disclosure. The screen brightness adjusting means 30 may include:
an obtaining module 31, configured to obtain a current ambient light intensity in an environment where the display device is located;
a determining module 32, configured to determine a spatial filter corresponding to the current ambient light intensity, where the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is;
and the adjusting module 33 is configured to adjust the brightness of the backlight partition of the display device based on the spatial filter, so that the brightness difference between the backlight partition before and after the brightness adjustment changes, and the visual requirement of the human eye under the environment light intensity change is matched.
In some embodiments, the determining module 32 is configured to obtain a correspondence between a preset ambient light intensity range and a spatial filter coefficient; determining a target ambient light intensity range in which the current ambient light intensity is located; determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation; and determining the spatial filter coefficient as the spatial filter coefficient corresponding to the current ambient light intensity.
In some embodiments, the determining module 32 is configured to obtain a preset mapping relationship between the spatial filter coefficient and the ambient light intensity; and determining a spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation.
In some embodiments, the adjusting module 33 is configured to adjust, based on the spatial filter, illumination intensities of backlight units corresponding to adjacent backlight partitions, so as to adjust brightness of the backlight partitions of the display device, so that brightness difference changes of the backlight partitions before and after brightness adjustment match visual requirements of human eyes under ambient light intensity changes.
In some embodiments, the adjusting module 33 is configured to adjust, based on the spatial filter, the brightness of a portion of the backlight partitions, so that the brightness difference between the backlight partitions before and after the brightness adjustment changes, and the visual requirement of the human eye under the change of the ambient light intensity is matched.
In specific implementation, each module may be implemented as a separate entity, or may be combined arbitrarily and implemented as the same entity or several entities.
As can be seen from the above, the screen brightness adjusting apparatus 30 provided in the embodiments of the present application obtains the current ambient light intensity in the environment where the display device is located through the obtaining module 31; determining, by the determining module 32, a spatial filter corresponding to the current ambient light intensity, where the weaker the ambient light intensity, the weaker the convergence of the spatial filter; the brightness of the backlight partition of the display device is adjusted by the adjusting module 33 based on the spatial filter, so that the brightness difference between the backlight partition before and after the brightness adjustment changes, and the visual requirement of human eyes under the environment light intensity change is matched. According to the method and the device, the ambient light intensity in the environment where the display device is located is obtained, then the convergence of the spatial filter is determined based on the ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is, and finally the brightness difference of each backlight partition is adjusted through the spatial filter, so that the screen picture of the display device is matched with the visual requirements of human eyes under different ambient light intensities.
Referring to fig. 6, fig. 6 is another schematic structural diagram of a screen brightness adjusting device according to an embodiment of the present application, where the screen brightness adjusting device 30 includes a memory 120, one or more processors 180, and one or more application programs, where the one or more application programs are stored in the memory 120 and configured to be executed by the processors 180; the processor 180 may include an acquisition module 31, a determination module 32, and an adjustment module 33. For example, the structures and connection relationships of the above respective components may be as follows:
The processor 180 is a control center of the device, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the device and processes data by running or executing application programs stored in the memory 120 and calling data stored in the memory 120, thereby performing overall monitoring of the device. Optionally, the processor 180 may include one or more processing cores; preferably, the processor 180 may integrate an application processor and a modem processor, wherein the application processor primarily processes an operating system, user interfaces, application programs, and the like.
In particular, in this embodiment, the processor 180 loads executable codes corresponding to the processes of one or more application programs into the memory 120 according to the following instructions, and the processor 180 executes the application programs stored in the memory 120, so as to implement various functions:
an obtaining module 31, configured to obtain a current ambient light intensity in an environment where the display device is located;
a determining module 32, configured to determine a spatial filter corresponding to the current ambient light intensity, where the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is;
And the adjusting module 33 is configured to adjust the brightness of the backlight partition of the display device based on the spatial filter, so that the brightness difference between the backlight partition before and after the brightness adjustment changes, and the visual requirement of the human eye under the environment light intensity change is matched.
In some embodiments, the determining module 32 is configured to obtain a correspondence between a preset ambient light intensity range and a spatial filter coefficient; determining a target ambient light intensity range in which the current ambient light intensity is located; determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation; and determining the spatial filter coefficient as the spatial filter coefficient corresponding to the current ambient light intensity.
In some embodiments, the determining module 32 is configured to obtain a preset mapping relationship between the spatial filter coefficient and the ambient light intensity; and determining a spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation.
In some embodiments, the adjusting module 33 is configured to adjust, based on the spatial filter, illumination intensities of backlight units corresponding to adjacent backlight partitions, so as to adjust brightness of the backlight partitions of the display device, so that brightness difference changes of the backlight partitions before and after brightness adjustment match visual requirements of human eyes under ambient light intensity changes.
In some embodiments, the adjusting module 33 is configured to adjust, based on the spatial filter, the brightness of a portion of the backlight partitions, so that the brightness difference between the backlight partitions before and after the brightness adjustment changes, and the visual requirement of the human eye under the change of the ambient light intensity is matched.
The embodiment of the application also provides a display device. Referring to fig. 7, fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application, which may be used to implement the screen brightness adjustment method provided in the above embodiment.
As shown in fig. 7, the display device 1200 may include an RF (Radio Frequency) circuit 110, a memory 120 including one or more computer readable storage media (only one is shown in the figure), an input unit 130, a display unit 140, a sensor 150, an audio circuit 160, a transmission module 170, a processor 180 including one or more processing cores (only one is shown in the figure), and a power supply 190. It will be appreciated by those skilled in the art that the display device 1200 structure shown in fig. 7 is not limiting of the display device 1200 and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:
The RF circuit 110 is configured to receive and transmit electromagnetic waves, and to perform mutual conversion between the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices. RF circuitry 110 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and the like. The RF circuitry 110 may communicate with various networks such as the internet, intranets, wireless networks, or other devices via wireless networks.
The memory 120 may be used to store software programs and modules, such as program instructions/modules corresponding to the vibration adjustment method in the above embodiments, and the processor 180 may execute various functional applications and data processing by running the software programs and modules stored in the memory 120, so as to improve the accuracy of screen-off of the control terminal.
The input unit 130 may be used to receive input numeric or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 130 may comprise a touch sensitive surface 131 and other input devices 132. The touch-sensitive surface 131, also referred to as a touch display screen or a touch pad, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch-sensitive surface 131 or thereabout by using any suitable object or accessory such as a finger, stylus, etc.), and actuate the corresponding connection means according to a predetermined program. Alternatively, the touch sensitive surface 131 may comprise two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 180, and can receive commands from the processor 180 and execute them. In addition, the touch-sensitive surface 131 may be implemented in various types of resistive, capacitive, infrared, surface acoustic wave, and the like. In addition to the touch-sensitive surface 131, the input unit 130 may also comprise other input devices 132. In particular, other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, mouse, joystick, etc.
The display unit 140 may be used to display information input by a user or information provided to the user and various graphical user interfaces of the display device 1200, which may be composed of graphics, text, icons, video, and any combination thereof. The display unit 140 may include a display panel 141, and alternatively, the display panel 141 may be configured in the form of an LCD (Liquid Crystal Display ), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface 131 may overlay the display panel 141, and upon detection of a touch operation thereon or thereabout by the touch-sensitive surface 131, the touch-sensitive surface is transferred to the processor 180 to determine the type of touch event, and the processor 180 then provides a corresponding visual output on the display panel 141 based on the type of touch event. Although in fig. 4 the touch-sensitive surface 131 and the display panel 141 are implemented as two separate components for input and output functions, in some embodiments the touch-sensitive surface 131 may be integrated with the display panel 141 to implement the input and output functions.
The display device 1200 may also include at least one sensor 150, such as a light sensor, a motion sensor, and other sensors. In particular, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 141 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 141 and/or the backlight when the display device 1200 moves to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile phone is stationary, and can be used for applications of recognizing the gesture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that may also be configured with the display device 1200 are not described in detail herein.
The display device 1200 may facilitate user email, web browsing, streaming media access, etc. via the transmission module 170 (e.g., wi-Fi module), which provides wireless broadband internet access to the user. Although fig. 4 shows the transmission module 170, it is understood that it does not belong to the essential constitution of the display device 1200, and may be omitted entirely as needed within the scope of not changing the essence of the invention.
The processor 180 is a control center of the display device 1200, connects various parts of the entire cellular phone using various interfaces and lines, and performs various functions of the display device 1200 and processes data by running or executing software programs and/or modules stored in the memory 120, and calling data stored in the memory 120, thereby performing overall monitoring of the cellular phone. Optionally, the processor 180 may include one or more processing cores; in some embodiments, the processor 180 may integrate an application processor that primarily processes operating systems, user interfaces, applications, etc., with a modem processor that primarily processes wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 180.
The display device 1200 also includes a power supply 190 (e.g., a battery) that provides power to the various components, and in some embodiments, may be logically coupled to the processor 180 via a power management system to manage charging, discharging, and power consumption. The power supply 190 may also include one or more of any of a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
Although not shown, the display device 1200 may further include a camera (e.g., front camera, rear camera), a bluetooth module, etc., which will not be described herein. In particular, in the present embodiment, the display unit 140 of the display device 1200 is a touch screen display, the display device 1200 further includes a memory 120, and one or more programs, wherein the one or more programs are stored in the memory 120 and configured to be executed by the one or more processors 180, the one or more programs include instructions for:
acquiring current ambient light intensity in the environment where the display device is located;
determining a spatial filter corresponding to the current ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is;
And adjusting the brightness of the backlight subarea of the display equipment based on the spatial filter, so that the brightness difference change of the backlight subarea before and after the brightness adjustment is matched with the visual requirement of human eyes under the environment light intensity change.
In some embodiments, the processor 180 is configured to obtain a correspondence between a preset ambient light intensity range and a spatial filter coefficient;
determining a target ambient light intensity range in which the current ambient light intensity is located;
determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation;
and determining the spatial filter coefficient as the spatial filter coefficient corresponding to the current ambient light intensity.
In some embodiments, the processor 180 is configured to obtain a preset mapping relationship between the spatial filter coefficient and the ambient light intensity;
and determining a spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation.
In some embodiments, the processor 180 is configured to map the current ambient light intensity to a preset light intensity range based on the first mapping relationship, to obtain a mapped light intensity, where the preset light intensity range is smaller than an ambient light intensity reference variation range;
And determining each spatial filter coefficient under the mapped light intensity based on a second mapping relation between the mapped light intensity and the spatial filter coefficient.
In some embodiments, the processor 180 is configured to adjust, based on the spatial filter, illumination intensities of backlight units corresponding to adjacent backlight partitions, so as to adjust brightness of the backlight partitions of the display device, so that brightness difference changes of the backlight partitions before and after brightness adjustment match visual requirements of human eyes under ambient light intensity changes.
In some embodiments, the processor 180 is configured to globally adjust the brightness of each of the backlight partitions based on the current ambient light intensity, so that the brightness of each of the backlight partitions is consistent and meets a preset brightness requirement.
In some embodiments, the processor 180 is configured to adjust the brightness of a portion of the backlight partitions based on the spatial filter, such that the brightness difference between the backlight partitions varies before and after the brightness adjustment, matching the visual needs of the human eye under the ambient light intensity variation.
As can be seen from the above, the embodiments of the present application provide a display device 1200, wherein the display device 1200 performs the following steps: acquiring current ambient light intensity in the environment where the display device is located; determining a spatial filter corresponding to the current ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is; and adjusting the brightness of the backlight subarea of the display equipment based on the spatial filter, so that the brightness difference change of the backlight subarea before and after the brightness adjustment is matched with the visual requirement of human eyes under the environment light intensity change. According to the method and the device, the ambient light intensity in the environment where the display device is located is obtained, then the convergence of the spatial filter is determined based on the ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is, and finally the brightness difference of each backlight partition is adjusted through the spatial filter, so that the screen picture of the display device is matched with the visual requirements of human eyes under different ambient light intensities.
The embodiment of the application also provides a storage medium, in which a computer program is stored, and when the computer program runs on a computer, the computer executes the screen brightness adjustment method according to any one of the embodiments.
It should be noted that, for the method for adjusting screen brightness according to the present application, it will be understood by those skilled in the art that all or part of the flow of implementing the method for adjusting screen brightness according to the embodiments of the present application may be implemented by controlling related hardware through a computer program, where the computer program may be stored in a computer readable storage medium, such as a memory of a display device, and executed by at least one processor within the display device, and the execution may include the flow of the embodiment of the method for adjusting vibration. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a random access Memory (RAM, random Access Memory), or the like.
For the screen brightness adjusting device of the embodiment of the present application, each functional module may be integrated in one processing chip, or each module may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated module, if implemented as a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium such as read-only memory, magnetic or optical disk, etc.
The method, the device, the storage medium and the display device for adjusting the screen brightness provided by the embodiment of the application are described in detail. The principles and embodiments of the present application are described herein with specific examples, the above examples being provided only to assist in understanding the methods of the present application and their core ideas; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (9)
1. A screen brightness adjustment method applied to a display device, the method comprising:
acquiring current ambient light intensity in the environment where the display device is located;
determining a spatial filter corresponding to the current ambient light intensity, wherein the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is;
adjusting the brightness of a backlight partition of the display device based on the spatial filter, so that the brightness difference between the backlight partition before and after the brightness adjustment changes, and the visual requirement of human eyes under the environment light intensity change is matched;
the determining the spatial filter corresponding to the current ambient light intensity includes:
Acquiring a corresponding relation between a preset ambient light intensity range and a spatial filter coefficient;
determining a target ambient light intensity range in which the current ambient light intensity is located;
determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation;
determining the spatial filter coefficient as a spatial filter coefficient corresponding to the current ambient light intensity;
wherein the spatial filter coefficients are derived based on the following formula:
ar is a spatial filter coefficient, a is the current ambient light intensity, C is the convergence coefficient of the spatial filter coefficient, B is a preset constant for limiting the range of C, r >0 is a variable, and when the variable is an integer, the number of turns where the coefficient Ar is located is represented.
2. The screen brightness adjustment method of claim 1, wherein the determining the spatial filter corresponding to the current ambient light intensity comprises:
acquiring a preset mapping relation between a spatial filter coefficient and the intensity of ambient light;
and determining a spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation.
3. The screen brightness adjustment method of claim 2, wherein the mapping relationship includes a first mapping relationship of ambient light intensity and mapped light intensity, and a second mapping relationship of mapped light intensity and the spatial filter coefficient;
The determining the spatial filter coefficient corresponding to the current ambient light intensity based on the preset mapping relation includes:
mapping the current ambient light intensity into a preset light intensity range based on the first mapping relation to obtain mapped light intensity, wherein the preset light intensity range is smaller than an ambient light intensity reference change range;
and determining each spatial filter coefficient under the mapped light intensity based on a second mapping relation between the mapped light intensity and the spatial filter coefficient.
4. The screen brightness adjustment method of claim 1, wherein adjusting the brightness of the backlight section of the display device based on the spatial filter such that the brightness difference between the backlight section before and after the brightness adjustment changes matches the visual demand of the human eye under the change of the ambient light intensity, comprises:
based on the spatial filter, adjusting the illumination intensity of each backlight unit corresponding to each adjacent backlight partition, thereby adjusting the brightness of the backlight partition of the display device, so that the brightness difference between the backlight partition before and after brightness adjustment changes, and the vision requirement of human eyes under the environment light intensity change is matched.
5. The method for adjusting the brightness of a screen according to claim 1, further comprising, after the obtaining the current ambient light intensity in the environment where the display device is located:
and carrying out global adjustment on the brightness of each backlight partition based on the current ambient light intensity, so that the brightness of each backlight partition is consistent and meets the preset brightness requirement.
6. The screen brightness adjustment method of claim 5, wherein adjusting the brightness of the backlight section of the display device based on the spatial filter such that the brightness difference between the backlight section before and after the brightness adjustment changes matches the visual demand of the human eye under the change of the ambient light intensity comprises:
based on the spatial filter, the brightness of part of the backlight subareas is adjusted, so that the brightness difference changes of the backlight subareas before and after brightness adjustment, and the vision requirement of human eyes under the environment light intensity change is matched.
7. A screen brightness adjustment device, the device comprising:
the acquisition module is used for acquiring the current ambient light intensity in the environment where the display equipment is located;
a determining module, configured to determine a spatial filter corresponding to the current ambient light intensity, where the weaker the ambient light intensity is, the weaker the convergence of the spatial filter is;
The adjusting module is used for adjusting the brightness of the backlight subarea of the display equipment based on the spatial filter, so that the brightness difference of the backlight subareas is changed before and after the brightness adjustment, and the visual requirement of human eyes under the environment light intensity change is matched;
the determination module is also for:
acquiring a corresponding relation between a preset ambient light intensity range and a spatial filter coefficient;
determining a target ambient light intensity range in which the current ambient light intensity is located;
determining a spatial filter coefficient corresponding to the target ambient light intensity range based on the corresponding relation;
determining the spatial filter coefficient as a spatial filter coefficient corresponding to the current ambient light intensity;
wherein the spatial filter coefficients are derived based on the following formula:
ar is a spatial filter coefficient, a is the current ambient light intensity, C is the convergence coefficient of the spatial filter coefficient, B is a preset constant for limiting the range of C, r >0 is a variable, and when the variable is an integer, the number of turns where the coefficient Ar is located is represented.
8. A computer-readable storage medium, in which a computer program is stored which, when run on a computer, causes the computer to perform the screen brightness adjustment method according to any one of claims 1 to 6.
9. A display device comprising a processor and a memory, the memory having stored therein a computer program, the processor being operable to perform the screen brightness adjustment method of any one of claims 1 to 6 by invoking the computer program stored in the memory.
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| JP4720757B2 (en) * | 2007-02-23 | 2011-07-13 | ソニー株式会社 | Light source device and liquid crystal display device |
| JP4296224B1 (en) * | 2008-05-26 | 2009-07-15 | 株式会社東芝 | Light emission control device and liquid crystal display device including the same |
| KR101341020B1 (en) * | 2009-12-11 | 2013-12-13 | 엘지디스플레이 주식회사 | Method for driving local dimming of liquid crystal display device and apparatus thereof |
| US8890793B2 (en) * | 2010-03-26 | 2014-11-18 | Hong Kong Applied Science and Technology Research Institute, Co. Ltd. | Adjusting a brightness level of a backlight of a display device |
| JP5661336B2 (en) * | 2010-05-28 | 2015-01-28 | 日立マクセル株式会社 | Liquid crystal display |
| KR101324453B1 (en) * | 2010-11-25 | 2013-10-31 | 엘지디스플레이 주식회사 | Method of local dimming method and liquid crystal display using the same |
| CN105632455B (en) * | 2014-10-27 | 2018-06-19 | 深圳富泰宏精密工业有限公司 | Screen intensity automatic regulating system and method |
| CN106328071B (en) * | 2016-10-14 | 2018-09-11 | 京东方科技集团股份有限公司 | A kind of the local backlight light-dimming method and liquid crystal display of liquid crystal display |
| CN109716427A (en) * | 2017-01-18 | 2019-05-03 | 华为技术有限公司 | Brightness adjustment method and terminal |
| CN109817170B (en) * | 2017-11-21 | 2020-09-29 | 华为技术有限公司 | Pixel compensation method, device and terminal device |
| CN107909970A (en) * | 2017-12-29 | 2018-04-13 | 晨星半导体股份有限公司 | Display device and corresponding local dimming driving method thereof |
| CN113299245B (en) * | 2021-05-11 | 2022-07-19 | 深圳创维－Rgb电子有限公司 | Display device local backlight adjustment method, device, display device and storage medium |
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