CN110930945A - Method, device and system for adjusting brightness of display screen - Google Patents
Method, device and system for adjusting brightness of display screen Download PDFInfo
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- CN110930945A CN110930945A CN201911322013.XA CN201911322013A CN110930945A CN 110930945 A CN110930945 A CN 110930945A CN 201911322013 A CN201911322013 A CN 201911322013A CN 110930945 A CN110930945 A CN 110930945A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention provides a method, a device and a system for adjusting the brightness of a display screen, wherein the method comprises the following steps: acquiring display brightness after screen reflection and transmission, and determining that the screen display brightness is greater than a first target brightness; adjusting the screen display brightness to a first target brightness, acquiring the ambient light illumination of the screen, and determining that the ambient light illumination is smaller than a first preset threshold; predicting the screen target brightness according to the ambient light illumination; obtaining an adjusting period stage according to the ambient illuminance and the predicted screen target brightness; and adjusting the duty ratio of the pulse PWM signal according to the adjusting period stage to obtain the target brightness of the screen. The method and the device can improve the accurate acquisition of the low ambient illuminance of the display screen, and ensure the comfort of human eyes by adopting the adjustment of intermediate brightness transition according to the low ambient illuminance.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a method, a device and a system for adjusting brightness of a display screen.
Background
Along with the popularization of intelligent devices such as mobile phones and tablet computers, the time for people to contact electronic products is more and more frequent. However, frequent contact with the display product may make the human eye tired or more vulnerable, especially in unstable lighting environments, and thus it is very important to adjust the screen brightness to fit the comfort of the human eye.
In the prior art, an ALS (Ambient Light Sensor) is embedded in an intelligent device and may be used to obtain the Ambient Light illuminance of the intelligent device, but since an OLED (organic Light-emitting display) screen frequently used has a certain transmittance, and the ALS Sensor is embedded in the ALS and below the screen, the Ambient Light illuminance needs to be detected through the screen.
Therefore, when the ambient illuminance is relatively dark, the brightness of screen display has an influence on ALS identification of the ambient illuminance, and the screen adjusting method based on the prior art cannot accurately acquire the ambient illuminance and appropriately adjust the screen display brightness according to the ambient illuminance, so that the problems of sudden brightness change, discomfort of human eyes and the like are caused.
Disclosure of Invention
The invention provides a method, a device and a system for adjusting the brightness of a display screen, which are used for improving the accurate acquisition of the low ambient illuminance of the display screen and ensuring the comfort of human eyes by adopting the intermediate brightness transition adjustment according to the low ambient illuminance.
In a first aspect, an embodiment of the present invention provides a method for adjusting brightness of a display screen, including:
acquiring display brightness after screen reflection and transmission, and determining that the screen display brightness is greater than a first target brightness;
adjusting the screen display brightness to a first target brightness, acquiring the ambient light illumination of the screen, and determining that the ambient light illumination is smaller than a first preset threshold;
predicting the screen target brightness according to the ambient light illumination;
obtaining an adjusting period stage according to the ambient illuminance and the predicted screen target brightness;
and adjusting the duty ratio of the pulse PWM signal according to the adjusting period stage to obtain the target brightness of the screen.
In one possible design, predicting the screen target brightness according to the ambient light illuminance includes:
and filtering infrared light and ultraviolet light according to the ambient illuminance, and predicting the target brightness of the screen.
In one possible design, obtaining an adjustment period phase according to the ambient light illuminance and the predicted screen target brightness includes:
and acquiring a first intermediate brightness of the ambient light illumination and the predicted screen target brightness, and obtaining an adjusting period stage according to the first intermediate brightness.
In one possible design, after obtaining the display brightness after the screen reflection and transmission, the method further includes:
if the detected screen display brightness is smaller than the first target brightness, predicting the screen target brightness or predicting a second intermediate brightness according to the screen display brightness;
and obtaining the adjusting period stage according to the second intermediate brightness.
In one possible design, further comprising:
acquiring the ambient illuminance of a screen, and determining that the ambient illuminance is not less than a first preset threshold;
detecting whether the change of the ambient light illumination is larger than a second preset threshold value or not;
if the change of the ambient light illumination is not larger than a second preset threshold value, adjusting the screen to the target brightness of the screen;
and if the change of the ambient light illumination is larger than the second preset threshold, performing brightness adjustment in more than two stages until the screen display brightness reaches the target screen brightness.
In a second aspect, an apparatus for adjusting brightness of a display screen provided in an embodiment of the present invention includes:
the comparison module is used for acquiring the display brightness after the screen reflection and transmission and determining that the display brightness of the screen is greater than the first target brightness;
the acquisition module is used for adjusting the screen display brightness to be a first target brightness, acquiring the ambient illuminance of the screen and determining that the ambient illuminance is smaller than a first preset threshold;
the prediction module is used for predicting the screen target brightness according to the ambient light illumination;
the obtaining module is used for obtaining an adjusting period stage according to the ambient illuminance and the predicted screen target brightness;
and the determining module is used for adjusting the duty ratio of the pulse PWM signal according to the adjusting period stage to obtain the target brightness of the screen.
In one possible design, the prediction module is specifically configured to:
and filtering infrared light and ultraviolet light according to the ambient illuminance, and predicting the target brightness of the screen.
In one possible design, the obtaining module is specifically configured to:
and acquiring a first intermediate brightness of the ambient light illumination and the predicted screen target brightness, and obtaining an adjusting period stage according to the first intermediate brightness.
In one possible design, after obtaining the display brightness after the screen reflection and transmission, the method further includes:
if the detected screen display brightness is smaller than the first target brightness, acquiring second intermediate brightness according to the screen display brightness and the predicted screen target brightness;
and obtaining the adjusting period stage according to the second intermediate brightness.
In one possible design, further comprising:
acquiring the ambient illuminance of a screen, and determining that the ambient illuminance is not less than a first preset threshold;
detecting whether the change of the ambient light illumination is larger than a second preset threshold value or not;
if the change of the ambient light illumination is not larger than a second preset threshold value, adjusting the screen to the target brightness of the screen;
and if the change of the ambient light illumination is larger than the second preset threshold, performing brightness adjustment in more than two stages until the screen display brightness reaches the target screen brightness.
In a third aspect, an embodiment of the present invention provides a system for adjusting brightness of a display screen, including: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of display screen brightness adjustment of any of the first aspect via execution of the executable instructions.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for adjusting brightness of a display screen according to any one of the first aspect.
The invention provides a method, a device and a system for adjusting the brightness of a display screen, wherein the method comprises the following steps: acquiring display brightness after screen reflection and transmission, and determining that the screen display brightness is greater than a first target brightness; adjusting the screen display brightness to a first target brightness, acquiring the ambient light illumination of the screen, and determining that the ambient light illumination is smaller than a first preset threshold; predicting the screen target brightness according to the ambient light illumination; obtaining an adjusting period stage according to the ambient illuminance and the predicted screen target brightness; and adjusting the duty ratio of the pulse PWM signal according to the adjusting period stage to obtain the target brightness of the screen. The method and the device can improve the accurate acquisition of the low ambient illuminance of the display screen, and ensure the comfort of human eyes by adopting the adjustment of intermediate brightness transition according to the low ambient illuminance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an exemplary application scenario of the present invention;
FIG. 2 is a schematic diagram of a prior art OLED screen;
FIG. 3 is a flowchart illustrating a method for adjusting brightness of a display screen according to an embodiment of the present invention;
FIG. 4 is a first schematic diagram illustrating a first adjustment period phase in the method for adjusting brightness of a display panel according to the first embodiment of the present invention;
fig. 5 is a schematic diagram of a second adjustment period phase in the method for adjusting the brightness of the display screen according to the first embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for adjusting brightness of a display screen according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a device for adjusting brightness of a display screen according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a system for adjusting brightness of a display screen according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a typical application scenario of the present invention, as shown in fig. 1, an ambient Light sensor ALS (ambient Light sensor) is embedded in an intelligent watch or a mobile phone, and may be used to determine Light intensity of an environment where an intelligent device is located, and output a control signal to a display screen by receiving ambient Light illuminance detected by the ALS, so as to adjust screen brightness and match the ambient Light illuminance.
Fig. 2 is a schematic diagram of an OLED screen in the prior art, in which the screen itself has a certain transmittance, and the ALS sensor is embedded below the screen, so that the ambient illuminance needs to be detected through the screen. When the ambient light is high, such as in outdoor application scenes, under the lamp and other application scenes, the brightness of the screen basically has no influence on the ALS detection ambient light, but when the ambient light is dark, such as in night, dusk and other scenes, the screen display brightness has influence on the ALS identification ambient light, particularly in the dark and high-brightness scenes, the ALS judgment ambient light is wrong, and further the screen brightness cannot be accurately adjusted to the target brightness of the screen. In addition, when the ambient light intensity suddenly changes from bright to dark or from dark to bright, the display brightness of the screen also changes, and the sudden change of the brightness can stimulate human eyes and influence the comfort of the eyes.
The display brightness of the screen after reflection and transmission is obtained, and the display brightness of the screen is determined to be greater than the first target brightness; adjusting the screen display brightness to a first target brightness, acquiring the ambient illuminance of the screen, and determining that the ambient illuminance is smaller than a first preset threshold; predicting the target brightness of the screen according to the ambient light illumination; predicting the screen target brightness according to the ambient illuminance to obtain an adjusting period stage; and according to the regulation period stage, regulating the duty ratio of the pulse PWM signal to obtain the target brightness of the screen. The method and the device can improve the accurate acquisition of the low ambient illuminance of the display screen, and ensure the comfort of human eyes by adopting the adjustment of intermediate brightness transition according to the low ambient illuminance. Wherein the first target brightness may comprise 1 nit.
Fig. 3 is a flowchart of a method for adjusting brightness of a display screen according to an embodiment of the present invention, and as shown in fig. 3, the method in this embodiment may include:
s201, obtaining the display brightness after the screen is reflected and transmitted, and determining that the display brightness of the screen is greater than the first target brightness. The first target brightness is 1nit, which is not limited in this embodiment.
Because the screen has a certain transmittance and the ALS sensor is embedded below the screen, in order to accurately acquire the display brightness of the screen, whether the display brightness of the screen is greater than 1nit is determined by acquiring the display brightness after the screen is reflected and transmitted and detecting whether the display brightness of the screen is greater than the first target brightness. So as to adjust the screen display brightness in the following.
S202, adjusting the screen display brightness to a first target brightness, acquiring the ambient light illumination of the screen, and determining that the ambient light illumination is smaller than a first preset threshold value.
Specifically, the screen display brightness is adjusted to 1nit, the ambient light illuminance of the screen is obtained, and the ambient light illuminance reference table in table 1 below is referred to, in this embodiment, the first preset threshold may be set to 10Lux, but this embodiment is not limited to adapt to a specific application scenario to achieve a better implementation effect.
TABLE 1
| Location/environment | Illuminance of light |
| In sunny days | 30000～300000Lux |
| Indoor in sunny day | 100～1000Lux |
| Cloudy day | 3000～10000Lux |
| Outside cloudy sky | 50～500Lux |
| In the cloudy sky | 5～50Lux |
| Indoor for dusk | 10Lux |
| Sunrise and sunset | 300Lux |
| Night | 0.001～0.02Lux |
In this embodiment, the ambient light illumination of the screen is obtained, and the current ambient light illumination is lower, and it is determined that the ambient light illumination is smaller than a first preset threshold, for example, 10 Lux. And then adjust the luminance of display screen according to the ambient light illuminance to make user's eyes can be fine adaptation present ambient light illuminance.
And S202, predicting the screen target brightness according to the ambient light illumination.
Specifically, infrared light and ultraviolet light are filtered according to the ambient illuminance, and the target brightness of the screen is predicted.
Specifically, the visible wavelengths of light to the human eye range from 400 nanometers to about 750 nanometers. The photodiode adopted by the display screen is generally the most reasonable ambient light illumination sensing device, and the photodiode can convert an optical signal into a current signal. Although the light sensitive range of a silicon photodiode is about 300 nm to 1100 nm and does not completely match the human visual range, the overlap is still what we mean. Regardless, ALS measurable light may include visible light as well as Ultraviolet (UV) and Infrared (IR) light, a combination of which makes ambient visible light appear brighter and potentially visually unpleasant to humans. Therefore, the infrared light and the ultraviolet light can be filtered by adopting the optical filter, so that the ALS sensor outputs the display brightness which is comfortable for vision and sense. Therefore, in the embodiment, infrared light and ultraviolet light are filtered to obtain the predicted screen target brightness, so that the subsequent specific adjustment is facilitated, and the screen display brightness can ensure the comfort of human eyes.
And S203, obtaining a regulation period stage according to the ambient light illumination and the predicted screen target brightness.
In an alternative embodiment, a first intermediate brightness between the ambient light illumination and the predicted screen target brightness is obtained, and the adjustment period stage is obtained according to the first intermediate brightness.
In this embodiment, the ALS sensor detects ambient light intensity in real time, determines that the ambient light intensity is less than 10Lux, further obtains predicted screen target brightness, and further adjusts screen display brightness by using period adjustment to achieve the screen target brightness, referring to fig. 4, fig. 4 is a schematic diagram of a first adjustment period stage in the method for adjusting display screen brightness according to the first embodiment of the present invention, as shown in fig. 4, for example, it is determined that the screen display brightness is greater than 1nit at time T1, the PWM signal duty ratio is reduced by using period T2 to adjust the screen display brightness to an intermediate brightness between the screen display brightness and 1nit, and further, the screen display brightness is adjusted to 1nit by using period T3. And when the ambient light illumination is determined to be less than 10Lux, reducing the duty ratio duty of the PWM signal by adopting T4 and T5 cycles respectively, and sequentially adjusting the screen display brightness to a first intermediate brightness (namely, the intermediate brightness equal to 1nit and the predicted screen target brightness) and the predicted screen target brightness (namely, the screen target brightness is reached).
In an optional embodiment, after obtaining the display brightness after the screen reflection and transmission, if the detected screen display brightness is smaller than the first target brightness, obtaining a second intermediate brightness according to the screen display brightness and the predicted screen target brightness; and obtaining the adjusting period stage according to the second intermediate brightness.
Referring to fig. 5, fig. 5 is a schematic diagram of a second adjustment period stage in the method for adjusting the brightness of the display screen according to the first embodiment of the present invention, as shown in fig. 5, for example, it is determined at time T1 that the screen display brightness is less than 1nit, and the PWM signal duty ratio is reduced according to the screen display brightness and a second intermediate brightness of the predicted screen target brightness to obtain the adjustment period stage, and the T2 and the T3 periods are respectively adopted to reduce the screen brightness to the second intermediate brightness (i.e., the intermediate brightness between the current screen display brightness and the predicted screen target brightness) and the predicted screen target brightness (i.e., the screen target brightness) sequentially.
In the embodiment, an adjusting period stage is obtained by obtaining the ambient light illumination and a first intermediate brightness of the predicted screen target brightness according to the first intermediate brightness; or obtaining a second intermediate brightness according to the current screen display brightness and the predicted screen target brightness to obtain an adjusting period stage; and then according to the regulation period stage, the duty ratio of the pulse PWM signal is regulated to obtain the target brightness of the screen, so that the screen is gradually changed, human eyes gradually adapt to the change, and the influence of the drastic change of the screen brightness on the human eyes is reduced.
In an alternative embodiment, the first intermediate brightness, the second intermediate brightness, the adjustment period stages (e.g., T2, T3, T4, and T5), and the duty cycle of the pulse PWM signal have corresponding mapping relationships, which is not limited in this embodiment. The prior art generally uses LCD and OLED screens, and the LCD screen implements screen brightness adjustment by adjusting the brightness of the backlight unit in the screen assembly, specifically, by changing the Duty ratio (Duty) of the screen backlight PWM signal. The higher the duty cycle, the higher the brightness. The OLED screen can realize the brightness adjustment of the screen by changing the switching frequency of the pixels due to self luminescence of the pixels, and the corresponding adjustment and control mode also changes the PWM signal Duty, and the change mode is consistent with that of the LCD screen. The invention is applicable to both OLED and LCD screens. The brightness is positively correlated with the illumination, i.e. the brighter the screen, the higher the illumination produced. The greater the screen brightness will have an effect on the ALS test ambient light. Specifically, the following formula one is referred to:
where L is luminance, R is reflectance, and E is illuminance.
When the screen brightness E is 1nit, the reflectance of the surface CG (Coverglass, CG is surface protective glass for short) is about 7%, the screen transmittance is about 6%, nit, and the brightness is considered negligible for ALS. 1nit is only an empirical reference value, and a specific set value can be collected after light is emitted from the OLED screen according to the reflectivity of the surface CG and the transmittance of the OLED screen and is reflected by the surface CG to enter the ALS sensor, and the brightness generated by actual reflection is 1 × 7% × 6% — 0.0042.
In this embodiment, the screen display brightness is obtained and it is determined that the ambient light illuminance is less than the first preset threshold value 10Lux, for example, the ambient light illuminance at night, and the display brightness after the screen reflection and transmission is obtained (refer to formula one), it is determined that the current screen display brightness has no influence on the ambient light detection, and since the brightness generated by the actual reflection is about 0.0042 and can be ignored, in order to more accurately detect the ambient light illuminance, according to the current screen display brightness and the predicted screen target brightness, T is respectively adoptedn-1And TnAnd periodically reducing the duty ratio duty of the PWM signal, and sequentially adjusting the screen display brightness to a first intermediate brightness (namely, the intermediate brightness equal to 1nit and the predicted screen target brightness) and the predicted screen target brightness (namely, the screen target brightness is achieved). Wherein n is any integer greater than 3. The method and the device can improve the accurate acquisition of the low ambient illuminance of the display screen, and ensure the comfort of human eyes by adopting the adjustment of intermediate brightness transition according to the low ambient illuminance.
And S204, adjusting the duty ratio of the pulse PWM signal according to the period adjusting stage to obtain the target brightness of the screen.
In conjunction with the above example, the system for display screen brightness adjustment accurately obtains low ambient light levels and adjusts the intermediate brightness transitions to ensure eye comfort based on the low ambient light levels. And will not be described in detail herein.
In an optional embodiment, acquiring the ambient light illumination of the screen, and determining that the ambient light illumination is not less than a first preset threshold;
detecting whether the change of the ambient light illumination is larger than a second preset threshold value or not;
if the change of the ambient light illumination is not larger than a second preset threshold value, adjusting the screen to the target brightness of the screen;
and if the change of the ambient light illumination is larger than a second preset threshold value, adjusting the brightness of more than two stages until the display brightness of the screen reaches the target brightness of the screen.
Referring to fig. 6 in particular, fig. 6 is a flowchart illustrating a method for adjusting brightness of a display screen according to a second embodiment of the present invention, as shown in fig. 6, in an alternative embodiment, if the obtained ambient light illuminance is higher than 10Lux, the brightness of the display screen has no influence on the ambient light detection. If the change of the ambient light illumination is small, for example, smaller than a second preset threshold, where the second preset threshold is 20% of the current ambient light illumination, the present embodiment is not limited, and it may be set according to the requirement as long as there is no obvious abnormality in the eye's impression, and the ambient light illumination tested by the ALS directly corresponds to the screen target brightness, and the screen brightness is directly adjusted to the screen target brightness. In another optional embodiment, if the ambient light illumination is higher than 10Lux and the change of the ambient light illumination is large, for example, greater than a second preset threshold, where the second preset threshold is 20% of the current ambient light illumination, this embodiment is not limited, and it may be set according to the requirement as long as there is no obvious abnormality in the visual sensation of human eyes, and at this time, to avoid the dazzling problem caused by the large change range of the light illumination, which causes the large change range of the screen display brightness, a multi-partition smooth transition manner is adopted for adjustment (for example, multi-cycle stage adjustment may be adopted), so that the screen brightness changes uniformly.
Fig. 7 is a schematic structural diagram of a display screen brightness adjusting apparatus according to a third embodiment of the present invention, and as shown in fig. 7, the display screen brightness adjusting apparatus according to the third embodiment of the present invention may include:
the comparison module 31 is configured to obtain the display brightness after the screen reflection and transmission, and determine that the screen display brightness is greater than the first target brightness;
the obtaining module 32 is configured to adjust the screen display brightness to a first target brightness, obtain an ambient illuminance of the screen, and determine that the ambient illuminance is smaller than a first preset threshold;
the prediction module 33 is used for predicting the screen target brightness according to the ambient light illumination;
an obtaining module 34, configured to obtain an adjustment period stage according to the ambient illuminance and the predicted screen target brightness;
and the determining module 35 is configured to adjust the duty ratio of the pulse PWM signal according to the adjustment period stage to obtain the target brightness of the screen.
In an alternative embodiment, the prediction module 33 is specifically configured to:
and filtering infrared light and ultraviolet light according to the ambient illuminance, and predicting the target brightness of the screen.
In an alternative embodiment, the obtaining module 34 is specifically configured to:
and acquiring a first intermediate brightness of the ambient light illumination and the predicted screen target brightness, and obtaining an adjusting period stage according to the first intermediate brightness.
In an alternative embodiment, after obtaining the display brightness after the screen reflection and transmission, the method further includes:
if the detected screen display brightness is smaller than the first target brightness, acquiring second intermediate brightness according to the screen display brightness and the predicted screen target brightness;
and obtaining the adjusting period stage according to the second intermediate brightness.
In an optional embodiment, further comprising:
acquiring the ambient illuminance of a screen, and determining that the ambient illuminance is not less than a first preset threshold;
detecting whether the change of the ambient light illumination is larger than a second preset threshold value or not;
if the change of the ambient light illumination is not larger than a second preset threshold value, adjusting the screen to the target brightness of the screen;
and if the change of the ambient light illumination is larger than a second preset threshold value, adjusting the brightness of more than two stages until the display brightness of the screen reaches the target brightness of the screen.
The device for adjusting the brightness of the display screen in this embodiment may execute the technical solution in the method shown in fig. 3, and for the specific implementation process and the technical principle, reference is made to the relevant description in the method shown in fig. 3, and details are not repeated here.
Fig. 8 is a schematic structural diagram of a system for adjusting brightness of a display screen according to a fourth embodiment of the present invention, and as shown in fig. 8, the system 40 for adjusting brightness of a display screen according to this embodiment may include: a processor 41 and a memory 42.
A memory 42 for storing a computer program (such as an application program, a functional module, and the like implementing the above-described method of adjusting the brightness of the display screen), computer instructions, and the like;
the computer programs, computer instructions, etc. described above may be stored in one or more memories 42 in partitions. And the above-mentioned computer program, computer instructions, data, etc. can be called by the processor 41.
A processor 41 for executing the computer program stored in the memory 42 to implement the steps of the method according to the above embodiments.
Reference may be made in particular to the description relating to the preceding method embodiment.
The processor 41 and the memory 42 may be separate structures or may be integrated structures integrated together. When the processor 41 and the memory 42 are separate structures, the memory 42 and the processor 41 may be coupled by a bus 43.
The server in this embodiment may execute the technical solution in the method shown in fig. 3, and for the specific implementation process and the technical principle, reference is made to the relevant description in the method shown in fig. 3, which is not described herein again.
In addition, embodiments of the present application further provide a computer-readable storage medium, in which computer-executable instructions are stored, and when at least one processor of the user equipment executes the computer-executable instructions, the user equipment performs the above-mentioned various possible methods.
Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in a communication device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for adjusting the brightness of a display screen is characterized by comprising the following steps:
acquiring display brightness after screen reflection and transmission, and determining that the screen display brightness is greater than a first target brightness;
adjusting the screen display brightness to a first target brightness, acquiring the ambient light illumination of the screen, and determining that the ambient light illumination is smaller than a first preset threshold;
predicting the screen target brightness according to the ambient light illumination;
obtaining an adjusting period stage according to the ambient illuminance and the predicted screen target brightness;
and adjusting the duty ratio of the pulse PWM signal according to the adjusting period stage to obtain the target brightness of the screen.
2. The method of claim 1, wherein predicting a screen target brightness based on the ambient light illumination comprises:
and filtering infrared light and ultraviolet light according to the ambient illuminance, and predicting the target brightness of the screen.
3. The method of claim 2, wherein deriving the adjustment period stage according to the ambient light level and the predicted screen target brightness comprises:
and acquiring a first intermediate brightness of the ambient light illumination and the predicted screen target brightness, and obtaining an adjusting period stage according to the first intermediate brightness.
4. The method of claim 1, after obtaining the display brightness after the screen reflection and transmission, further comprising:
if the detected screen display brightness is smaller than the first target brightness, acquiring second intermediate brightness according to the screen display brightness and the predicted screen target brightness;
and obtaining the adjusting period stage according to the second intermediate brightness.
5. The method according to any one of claims 1-4, further comprising:
acquiring the ambient illuminance of a screen, and determining that the ambient illuminance is not less than a first preset threshold;
detecting whether the change of the ambient light illumination is larger than a second preset threshold value or not;
if the change of the ambient light illumination is not larger than a second preset threshold value, adjusting the screen to the target brightness of the screen;
and if the change of the ambient light illumination is larger than the second preset threshold, performing brightness adjustment in more than two stages until the screen display brightness reaches the target screen brightness.
6. A device for adjusting the brightness of a display screen is characterized by comprising:
the comparison module is used for acquiring the display brightness after the screen reflection and transmission and determining that the display brightness of the screen is greater than the first target brightness;
the acquisition module is used for adjusting the screen display brightness to be a first target brightness, acquiring the ambient illuminance of the screen and determining that the ambient illuminance is smaller than a first preset threshold;
the prediction module is used for predicting the screen target brightness according to the ambient light illumination;
the obtaining module is used for obtaining an adjusting period stage according to the ambient illuminance and the predicted screen target brightness;
and the determining module is used for adjusting the duty ratio of the pulse PWM signal according to the adjusting period stage to obtain the target brightness of the screen.
7. The apparatus of claim 6, wherein the prediction module is specifically configured to:
and filtering infrared light and ultraviolet light according to the ambient illuminance, and predicting the target brightness of the screen.
8. The apparatus of claim 7, wherein the obtaining module is specifically configured to:
and acquiring a first intermediate brightness of the ambient light illumination and the predicted screen target brightness, and obtaining an adjusting period stage according to the first intermediate brightness.
9. A system for adjusting the brightness of a display screen, comprising: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of display screen brightness adjustment of any of claims 1-5 via execution of the executable instructions.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of adjusting the brightness of a display screen according to any one of claims 1 to 5.
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