CN109493831A - A kind of processing method and processing device of picture signal - Google Patents
A kind of processing method and processing device of picture signal Download PDFInfo
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- CN109493831A CN109493831A CN201811493733.8A CN201811493733A CN109493831A CN 109493831 A CN109493831 A CN 109493831A CN 201811493733 A CN201811493733 A CN 201811493733A CN 109493831 A CN109493831 A CN 109493831A
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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
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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
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Abstract
The application provides a kind of processing method and processing device of picture signal, which comprises according to the display brightness of current ambient light illumination adjustment display equipment；The reflecting brightness of the display equipment is determined according to the reflectivity of the display equipment；According to the display brightness of the reflecting brightness and display equipment adjusted, the brightness of picture signal to be output is adjusted.Using this method, may be implemented to promote user experience according to the brightness of the reflectivity adjustment image to be displayed of ambient light illumination and display equipment itself to improve the image quality of display equipment.
Description
Technical field
This application involves signal processing technology field more particularly to a kind of processing method and processing devices of picture signal.
Background technique
With the rapid development of display technology, display screen using more and more extensive, such as TV, mobile phone, computer, plate
Etc. all have display screen in equipment, by display screen, user can watch the image frame of colorful multiplicity.
Currently, the developer of TV, computer or other display equipment increasingly pays close attention to the adjust automatically of image quality, such as logical
It crosses the technologies such as local controlled light, environment be photosensitive to be automatically adjusted image quality, however, the image adjusted out by those technologies
The problems such as that there are still contrasts is bad for image quality, image is fuzzy, influences user experience.
Summary of the invention
In view of this, the application provides a kind of processing method and processing device of picture signal, using this method, root may be implemented
According to the brightness of the reflectivity adjustment image to be displayed of ambient light illumination and display equipment itself, to improve the image quality of display equipment,
Promote user experience.
Specifically, the application is achieved by the following technical solution:
According to the embodiment of the present application in a first aspect, providing a kind of processing method of picture signal, which comprises
According to the display brightness of current ambient light illumination adjustment display equipment；
The reflecting brightness of the display equipment is determined according to the reflectivity of the display equipment；
According to the display brightness of the reflecting brightness and display equipment adjusted, the bright of picture signal to be output is adjusted
Degree.
Optionally, the display brightness of the current ambient light illumination adjustment display equipment of the basis, comprising:
The corresponding target display brightness of current ambient light illumination, the light sensation are determined according to preset light sensation curve model
Curve model is used to indicate the corresponding relationship of ambient light illumination and display brightness；
The display brightness for showing equipment is adjusted to the target display brightness.
It is described according to the reflecting brightness and it is adjusted display equipment display brightness, adjust picture signal to be output
Brightness, comprising:
By the reflecting brightness and it is adjusted display equipment display brightness and value be determined as currently may be viewed by most
Big brightness；
According to the original brightness of picture signal to be output, the maximum brightness that currently may be viewed by and preset gamma
Value calculates expectation and watches brightness；
The desired display that the difference of the expectation viewing brightness and the reflecting brightness is determined as the display equipment is bright
Degree；
The figure to be output is calculated according to the desired display brightness of the display equipment and preset photoelectric conversion curve
As the expectation brightness of signal；
It is the expectation brightness by the brightness adjustment of the picture signal to be output.
Optionally, the method also includes:
It records between the original brightness of the picture signal to be output and the expectation brightness of the picture signal to be output
Corresponding relationship；
If the desired display brightness less than 0, the method also includes:
The first corresponding relationship and the second corresponding relationship are chosen in the pre-recorded corresponding relationship, wherein described
Original brightness in one corresponding relationship is less than the original brightness of the picture signal to be output, the original in second corresponding relationship
Beginning brightness is greater than the original brightness of the picture signal to be output；
According to first corresponding relationship and the second corresponding relationship, the figure to be output is determined using linear interpolation algorithm
As the expectation brightness of signal.
According to the second aspect of the embodiment of the present application, a kind of processing unit of picture signal is provided, described device includes:
The first adjustment module, for the display brightness according to current ambient light illumination adjustment display equipment；
Reflecting brightness determining module, for determining that the reflection of the display equipment is bright according to the reflectivity of the display equipment
Degree；
Second adjustment module, for according to the reflecting brightness and it is adjusted display equipment display brightness, adjustment to
Export the brightness of picture signal.
Optionally, the first adjustment module includes:
Object brightness determines submodule, for determining that current ambient light illumination is corresponding according to preset light sensation curve model
Target display brightness, the light sensation curve model is used to indicate the corresponding relationship of ambient light illumination and display brightness；
Display brightness adjusting submodule, for the display brightness for showing equipment to be adjusted to the target display brightness.
The second adjustment module includes:
First determines submodule, for by the reflecting brightness and the display brightness of display equipment adjusted and value it is true
It is set to the maximum brightness that currently may be viewed by；
First correction module, for the original brightness according to picture signal to be output, the maximum that currently may be viewed by
Brightness and preset gamma value calculate expectation and watch brightness；
Second determines submodule, and the difference for brightness and the reflecting brightness to be watched in the expectation is determined as described show
Show the desired display brightness of equipment；
Second correction module, for according to the desired display brightness for showing equipment and preset photoelectric conversion curve
Calculate the expectation brightness of the picture signal to be output；
Luminance signals adjusting submodule, for being the expectation brightness by the brightness adjustment of the picture signal to be output.
Optionally, described device further include:
Logging modle, for recording the original brightness of the picture signal to be output and the phase of the picture signal to be output
Hope the corresponding relationship between brightness；
If the desired display brightness is less than 0, described device further include:
Module is chosen, for choosing the first corresponding relationship and the second corresponding pass in the pre-recorded corresponding relationship
System, wherein original brightness in first corresponding relationship is less than the original brightness of the picture signal to be output, and described second
Original brightness in corresponding relationship is greater than the original brightness of the picture signal to be output；
Linear interpolation processing module, for being inserted using linear according to first corresponding relationship and the second corresponding relationship
Value-based algorithm determines the expectation brightness of the picture signal to be output.
According to the third aspect of the embodiment of the present application, a kind of display equipment is provided, the equipment includes:
Processor；
For storing the memory of the processor-executable instruction；
Wherein, the processor is configured to executing any figure provided by the embodiments of the present application using the executable instruction
As signal processing method the step of.
According to the fourth aspect of the embodiment of the present application, a kind of display equipment is provided, the equipment includes the embodiment of the present application
The processing unit of any image signal of offer.
As seen from the above-described embodiment, pass through the display brightness according to current ambient light illumination adjustment display equipment；According to
Show that the reflectivity of equipment determines the reflecting brightness of display equipment；Display according to reflecting brightness and display equipment adjusted is bright
Degree, adjusts the brightness of picture signal to be output, may be implemented to be adjusted according to the reflectivity of ambient light illumination and display equipment itself
The brightness of image to be displayed promotes user experience to improve the image quality of display equipment.
Detailed description of the invention
Fig. 1 is a kind of embodiment flow chart of the processing method for picture signal that one exemplary embodiment of the application provides；
Fig. 2 is a kind of example of light sensation curve model；
Fig. 3 is a kind of hardware structure diagram of display equipment where the processing unit of the application picture signal；
Fig. 4 is a kind of embodiment block diagram of the processing unit for picture signal that one exemplary embodiment of the application provides.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the application.
It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application.
It is also intended in the application and the "an" of singular used in the attached claims, " described " and "the" including majority
Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps
It may be combined containing one or more associated any or all of project listed.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the application
A little information should not necessarily be limited by these terms.These terms are only used to for same type of information being distinguished from each other out.For example, not departing from
In the case where the application range, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination ".
Referring to Figure 1, a kind of embodiment of the processing method of the picture signal provided for one exemplary embodiment of the application
Flow chart, this method can be applied in display equipment, such as smart television, comprising the following steps:
Step 101: according to the display brightness of current ambient light illumination adjustment display equipment.
Under identical ambient light illumination, the too high or too low view that can all influence user of display brightness of equipment itself is shown
Feel comfort level, under different ambient light illuminations, display equipment is also unable to satisfy the viewing of user using identical display brightness
Experience is based on this, can generate the environment light of different illumination using technological means simulating sun photosystem in advance, and combine different
Display brightness carries out subjective evaluation to subject, obtains under varying environment illuminance, can preferably meet user's viewing experience
Display brightness, establish light sensation curve model on this basis, which is then used to indicate ambient light illumination and aobvious
Show the corresponding relationship of brightness.
In one embodiment, since the tune backlight control of display equipment is had developed in form based on PWM (Pulse
Width Modulation, pulse width modulation) digital dimming mode, under the dimming mode, by operating current perseverance
The mode that PWM duty cycle is adjusted under fixed condition adjusts the lighting time control LED light brightness of LED light in backlight, aobvious to adjust
Show the display brightness of equipment.It is thus possible to display brightness is indicated with PWM duty cycle, then, above-mentioned light sensation curve model then may be used
With for indicating the corresponding relationship of ambient light illumination and PWM duty cycle, for example, showing shown in Fig. 2 for one kind of light sensation curve model
Example.
Based on foregoing description, in this application, then can be determined currently according to above-mentioned described light sensation curve model
The display brightness is known as target display brightness for convenience by the corresponding display brightness of ambient light illumination, subsequent, will be shown
Show that the display brightness of equipment is adjusted to the target display brightness.In addition, if light sensation curve model is for indicating ambient lighting
The corresponding relationship of degree and PWM duty cycle, then can determine the corresponding mesh of current ambient light illumination according to the light sensation curve model
PWM duty cycle is marked, it will be appreciated by persons skilled in the art that can will show the aobvious of equipment according to the target PWM duty cycle
Show brightness adjustment to target display brightness.
In addition, it should be noted that, the above-mentioned described display brightness according to target PWM duty cycle adjustment display equipment
It is only used as a kind of optional implementation, in practical applications, the display brightness of equipment can also be shown according to electric current adjustment,
Under such mode, above-mentioned light sensation curve model then can be used for the corresponding relationship of circumstance illuminance and electric current, the application couple
This and with no restriction.
Step 102: the reflecting brightness of display equipment is determined according to the reflectivity of display equipment.
In this application, the reflecting brightness L of display equipment can be calculated by following formula (one)f:
In above-mentioned formula (one), LgIndicate ambient light illumination, K indicates the reflectivity of display equipment.
Step 103: according to the display brightness of reflecting brightness and display equipment adjusted, adjusting picture signal to be output
Brightness.
In this application, firstly, reflecting brightness and step 101 display brightness adjusted that step 102 is determined it
Between and value be determined as the maximum brightness L that currently may be viewed by of userd。
In next step, according to the original brightness L of picture signal to be outputi, the current maximum brightness L that may be viewed byd, and it is default
Gamma value, be denoted as γ, by following formula (two) calculate user expectation watch brightness:
In above-mentioned formula (two), Li_maxIndicate that the maximum of picture signal to be output allows brightness.
In next step, brightness is watched into the expectation of userWith above-mentioned reflecting brightness LfDifference, be determined as show equipment
Desired display brightness
Finally, according to the desired display brightness of display equipmentFigure to be output is calculated with preset photoelectric conversion curve
As the expectation brightness L of signali_q, which can be indicated by following formula (three):
In above-mentioned formula (three), Lq_maxIndicate that the maximum of display equipment allows brightness.
Finally, being desired brightness by the brightness adjustment of picture signal to be output.
In addition, in this application, when environmental light brightness is higher, input original signal brightness is lower, it is possible in appearance
State the desired display brightness of calculated display equipmentSituation less than 0 can not then continue according to upper in this case
The expectation brightness that description calculates picture signal to be output is stated, in order to solve this problem, the application proposes following scheme:
After description calculates the expectation brightness of picture signal to be output as described above, image letter to be output is recorded
Number original brightness and its it is corresponding expectation brightness between corresponding relationship, it is subsequent, when calculated desired display brightness is less than 0
When, then two pairs of corresponding relationships can be chosen from the pre-recorded corresponding relationship, it is for convenience, one pair of them are corresponding
Relationship is known as the first corresponding relationship, and another pair corresponding relationship is known as the second corresponding relationship.Wherein, the original in the first corresponding relationship
Beginning brightness is less than the original brightness of image to be output, and the original brightness in the second corresponding relationship is greater than the original of picture signal to be output
Beginning brightness determines the expectation brightness of picture signal to be output using linear interpolation algorithm later.
As an example it is assumed that the original brightness in the first corresponding relationship is L1, it is expected that brightness is L2；In second corresponding relationship
Original brightness be L3, it is expected that brightness is L4, then it can list following formula (four):
By mathematical concept it is found that the signal of picture signal to be output can be solved by solving above-mentioned formula (four)
Expectation brightness Li_q。
As seen from the above-described embodiment, pass through the display brightness according to current ambient light illumination adjustment display equipment；According to
Show that the reflectivity of equipment determines the reflecting brightness of display equipment；Display according to reflecting brightness and display equipment adjusted is bright
Degree, adjusts the brightness of picture signal to be output, may be implemented to be adjusted according to the reflectivity of ambient light illumination and display equipment itself
The brightness of image to be displayed promotes user experience to improve the image quality of display equipment.
Corresponding with the embodiment of the processing method of aforementioned picture signal, present invention also provides the processing of picture signal dresses
The embodiment set.
The embodiment of the processing unit of the application picture signal can be using on the display device.Installation practice can lead to
Software realization is crossed, can also be realized by way of hardware or software and hardware combining.Taking software implementation as an example, as a logic
Device in meaning is to be referred to computer program corresponding in nonvolatile memory by the processor of touch control device where it
It enables and is read into memory what operation was formed.For hardware view, as shown in figure 3, for where the device of the application picture signal
A kind of hardware structure diagram for showing equipment, in addition to processor 31 shown in Fig. 3, memory 32, network interface 33, non-volatile memories
Except device 34, internal bus 35, display equipment in embodiment where device, can be with generally according to the actual functional capability of the equipment
Including other hardware, this is repeated no more.
Referring to FIG. 4, being a kind of embodiment of the processing unit for picture signal that one exemplary embodiment of the application provides
Block diagram, as shown in figure 4, the apparatus may include: the first adjustment module 41, reflecting brightness determining module 42 and second adjustment
Module 43.
Wherein, the first adjustment module 41, for the display brightness according to current ambient light illumination adjustment display equipment；
Reflecting brightness determining module 42, for determining the reflection of the display equipment according to the reflectivity of the display equipment
Brightness；
Second adjustment module 43, for the display brightness according to the reflecting brightness and display equipment adjusted, adjustment
The brightness of picture signal to be output.
In one embodiment, the first adjustment module 41 may include (being not shown in Fig. 4):
Object brightness determines submodule, for determining that current ambient light illumination is corresponding according to preset light sensation curve model
Target display brightness, the light sensation curve model is used to indicate the corresponding relationship of ambient light illumination and display brightness；
Display brightness adjusting submodule, for the display brightness for showing equipment to be adjusted to the target display brightness.
In one embodiment, the second adjustment module 43 may include (being not shown in Fig. 4):
First determines submodule, for by the reflecting brightness and the display brightness of display equipment adjusted and value it is true
It is set to and currently may be viewed by maximum brightness；
First correction module, for the original brightness according to picture signal to be output, the maximum that currently may be viewed by
Brightness and preset gamma value calculate expectation and watch brightness；
Second determines submodule, and the difference for brightness and the reflecting brightness to be watched in the expectation is determined as described show
Show the desired display brightness of equipment；
Second correction module, for according to the desired display brightness for showing equipment and preset photoelectric conversion curve
Calculate the expectation brightness of the picture signal to be output；
Luminance signals adjusting submodule, for being the expectation brightness by the brightness adjustment of the picture signal to be output.
In one embodiment, described device can also include (being not shown in Fig. 4):
Logging modle, for recording the original brightness of the picture signal to be output and the phase of the picture signal to be output
Hope the corresponding relationship between brightness；
If the desired display brightness is less than 0, described device further include:
Module is chosen, for choosing the first corresponding relationship and the second corresponding pass in the pre-recorded corresponding relationship
System, wherein original brightness in first corresponding relationship is less than the original brightness of the picture signal to be output, and described second
Original brightness in corresponding relationship is greater than the original brightness of the picture signal to be output；
Linear interpolation processing module, for being inserted using linear according to first corresponding relationship and the second corresponding relationship
Value-based algorithm determines the expectation brightness of the picture signal to be output.
The function of each unit and the realization process of effect are specifically detailed in the above method and correspond to step in above-mentioned apparatus
Realization process, details are not described herein.
For device embodiment, since it corresponds essentially to embodiment of the method, so related place is referring to method reality
Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separation unit
The unit of explanation may or may not be physically separated, and component shown as a unit can be or can also be with
It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual
The purpose for needing to select some or all of the modules therein to realize application scheme.Those of ordinary skill in the art are not paying
Out in the case where creative work, it can understand and implement.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (10)
1. a kind of processing method of picture signal, which is characterized in that the described method includes:
According to the display brightness of current ambient light illumination adjustment display equipment；
The reflecting brightness of the display equipment is determined according to the reflectivity of the display equipment；
According to the display brightness of the reflecting brightness and display equipment adjusted, the brightness of picture signal to be output is adjusted.
2. the method according to claim 1, wherein the ambient light illumination adjustment display equipment that the basis is current
Display brightness, comprising:
The corresponding target display brightness of current ambient light illumination, the light sensation curve are determined according to preset light sensation curve model
Model is used to indicate the corresponding relationship of ambient light illumination and display brightness；
The display brightness of the display equipment is adjusted to the target display brightness.
3. the method according to claim 1, wherein described set according to the reflecting brightness with display adjusted
Standby display brightness adjusts the brightness of picture signal to be output, comprising:
By the reflecting brightness and it is adjusted display equipment display brightness and value be determined as currently may be viewed by it is most light
Degree；
According to the original brightness of picture signal to be output, the maximum brightness that currently may be viewed by and preset gamma value meter
It calculates expectation and watches brightness；
The difference that brightness and the reflecting brightness are watched in the expectation is determined as the desired display brightness for showing equipment；
The image to be output is calculated according to the desired display brightness of the display equipment and preset photoelectric conversion curve to believe
Number expectation brightness；
It is the expectation brightness by the brightness adjustment of the picture signal to be output.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
It records corresponding between the original brightness of the picture signal to be output and the expectation brightness of the picture signal to be output
Relationship；
If the desired display brightness less than 0, the method also includes:
The first corresponding relationship and the second corresponding relationship are chosen in the pre-recorded corresponding relationship, wherein described first pair
Original brightness in should being related to is less than the original brightness of the picture signal to be output, original bright in second corresponding relationship
Degree is greater than the original brightness of the picture signal to be output；
According to first corresponding relationship and the second corresponding relationship, determine that the image to be output is believed using linear interpolation algorithm
Number expectation brightness.
5. a kind of processing unit of picture signal, which is characterized in that described device includes:
The first adjustment module, for the display brightness according to current ambient light illumination adjustment display equipment；
Reflecting brightness determining module, for determining the reflecting brightness of the display equipment according to the reflectivity of the display equipment；
Second adjustment module adjusts to be output for the display brightness according to the reflecting brightness and display equipment adjusted
The brightness of picture signal.
6. device according to claim 5, which is characterized in that the first adjustment module includes:
Object brightness determines submodule, for determining the corresponding mesh of current ambient light illumination according to preset light sensation curve model
Display brightness is marked, the light sensation curve model is used to indicate the corresponding relationship of ambient light illumination and display brightness；
Display brightness adjusting submodule, for the display brightness of the display equipment to be adjusted to the target display brightness.
7. device according to claim 5, which is characterized in that the second adjustment module includes:
First determine submodule, for by the reflecting brightness and it is adjusted display equipment display brightness and value be determined as
The maximum brightness that currently may be viewed by；
First correction module, for the original brightness according to picture signal to be output, the maximum brightness that currently may be viewed by,
And preset gamma value calculates expectation and watches brightness；
Second determines submodule, sets for the difference of the expectation viewing brightness and the reflecting brightness to be determined as the display
Standby desired display brightness；
Second correction module, for being calculated according to the desired display brightness and preset photoelectric conversion curve of the display equipment
The expectation brightness of the picture signal to be output out；
Luminance signals adjusting submodule, for being the expectation brightness by the brightness adjustment of the picture signal to be output.
8. device according to claim 7, which is characterized in that described device further include:
Logging modle, it is bright for recording the original brightness of the picture signal to be output and the expectation of the picture signal to be output
Corresponding relationship between degree；
If the desired display brightness is less than 0, described device further include:
Module is chosen, for choosing the first corresponding relationship and the second corresponding relationship in the pre-recorded corresponding relationship,
In, the original brightness in first corresponding relationship is less than the original brightness of the picture signal to be output, and described second is corresponding
Original brightness in relationship is greater than the original brightness of the picture signal to be output；
Linear interpolation processing module, for being calculated using linear interpolation according to first corresponding relationship and the second corresponding relationship
Method determines the expectation brightness of the picture signal to be output.
9. a kind of display equipment, which is characterized in that the equipment includes:
Processor；
For storing the memory of the processor-executable instruction；
Wherein, the processor is configured to requiring the step of any one method of 1-4 using the executable instruction perform claim
Suddenly.
10. a kind of display equipment, which is characterized in that the equipment includes the processing of the picture signal of any one of claim 5-8
Device.
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| CN111724754A (en) * | 2020-06-30 | 2020-09-29 | 上海乂学教育科技有限公司 | Eye protection method and system for online learning system |
| CN114743508A (en) * | 2021-01-07 | 2022-07-12 | 海信视像科技股份有限公司 | Brightness compensation method and display device |
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| CN106357904A (en) * | 2016-09-18 | 2017-01-25 | 青岛海信移动通信技术股份有限公司 | Screen light intensity adjusting method and mobile terminal |
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| CN111415608B (en) * | 2020-04-13 | 2021-10-26 | 深圳天德钰科技股份有限公司 | Driving method, driving module and display device |
| CN111667800A (en) * | 2020-06-16 | 2020-09-15 | 广州视源电子科技股份有限公司 | Image display parameter adjusting method and device, storage medium and terminal |
| CN111724754A (en) * | 2020-06-30 | 2020-09-29 | 上海乂学教育科技有限公司 | Eye protection method and system for online learning system |
| CN111724754B (en) * | 2020-06-30 | 2021-04-09 | 上海松鼠课堂人工智能科技有限公司 | Eye protection method and system for online learning system |
| CN114743508A (en) * | 2021-01-07 | 2022-07-12 | 海信视像科技股份有限公司 | Brightness compensation method and display device |
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