CN109754761A - A kind of method and device changing adjustment electrowetting display brightness with environment light - Google Patents
A kind of method and device changing adjustment electrowetting display brightness with environment light Download PDFInfo
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- CN109754761A CN109754761A CN201910204397.9A CN201910204397A CN109754761A CN 109754761 A CN109754761 A CN 109754761A CN 201910204397 A CN201910204397 A CN 201910204397A CN 109754761 A CN109754761 A CN 109754761A
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Abstract
The present invention relates to a kind of method and devices for changing adjustment electrowetting display brightness with environment light, real-time measurement external environmental light, judge whether current outside environment light belongs in default range, when external environmental light is lower than preset range, adjusted in external environmental light to default range by Light Source Compensation；The display brightness of Electrowetting device is adjusted in conjunction with human eye sensory perceptual system according to current outside environment light.The present invention can change the brightness of adjustment electrowetting display screen with environment light, can protect human eye.
Description
Technical field
The present invention relates to battery testing field, especially a kind of method for changing adjustment electrowetting display brightness with environment light
And device.
Background technique
In recent years, electronic paper display device because its perception effect be similar to paper, low-power consumption, environmental protection the advantages that and by pass
Note.Electrowetting Electronic Paper is equally able to achieve high brightness, high contrast, low energy consumption compared to electrophoretic electronic paper, and in response speed
On be faster than electrophoretic electronic paper, thus become the focus on research direction of electric paper display of new generation.
Electrowetting electric paper display is a kind of reflected displaying device, by reflecting external environmental light, to reach display
Purpose, therefore backlight is not needed, power consumption can be saved.But also it is easier to the influence by external environmental light.When outer
When boundary's environment light is darker, indicator screen is also just darker, or even can not show；When external environmental light is very bright, indicator screen
Also just brighter.Such display is easy to damage human eye, also limits the use scope of electrowetting electric paper display.
Summary of the invention
In view of this, the purpose of the present invention is to propose to it is a kind of with environment light change adjustment electrowetting display brightness method and
Device can change the brightness of adjustment electrowetting display screen with environment light, can protect human eye.
The present invention is realized using following scheme: a method of changing adjustment electrowetting display brightness with environment light, in real time
External environmental light is measured, judges whether current outside environment light belongs in default range, when external environmental light is lower than default model
When enclosing, adjusted in external environmental light to default range by Light Source Compensation；According to current outside environment light, perceived in conjunction with human eye
System adjusts the display brightness of Electrowetting device.
Further, described that the display of Electrowetting device is adjusted in conjunction with human eye sensory perceptual system according to current outside environment light
Brightness specifically includes the following steps:
Step S1: the corresponding intensity level L of gray level for the image of being shown is determinedd, and for distinguish weak environment light and
The ambient light threshold A of strong environment light；
Step S2: human eye sensory perceptual system formula is used, human eye eye response R under standard environment is obtained；Wherein human eye perceives
System equations are as follows:
In formula, α, β are constant (usual value is respectively 0.69,5.83)；
Step S3: obtaining environment light A' at this time, calculates the corresponding human eye of environment light A' by human eye sensory perceptual system formula
Eye response R':
In formula,For the corresponding intensity level of the lower image gray levels of being shown of environment light A'；
To guarantee that human eye obtains identical human eye vision response under different environment light, R'=R is enabled, is perceived by human eye
System equations obtain the corresponding intensity level of the lower image gray levels of being shown of environment light A'
Step S4: check that the Electrowetting device display brightness to be driven is closed with environment light and driving voltage DL-AL-V variation
It is curve, inquires intensity levelCorresponding driving voltage, to utilize the driving voltage adjustment Electrowetting device inquired
Display brightness.
The present invention also provides a kind of based on the method described above for changing adjustment electrowetting display brightness with environment light
Device, including electrowetting display screen, Main Control Unit and the photosensitive unit being electrical connected with it, brightness adjustment unit,
Image display gray level information extraction unit, driving voltage control unit, Light Source Compensation unit；
The photosensitive unit is electrical connected with the Main Control Unit, to detect external environmental light and will test result
It is transmitted to Main Control Unit；
Described image shows that grayscale information extraction unit is connected with the Main Control Unit, for extracting current display figure
The gray scale intensities information of picture, and the information extracted is transferred to the Main Control Unit；
The Light Source Compensation unit is electrical connected with the Main Control Unit, for being lower than default model when external environmental light
When enclosing, environment light is adjusted to preset range by the control of main controller unit；
The brightness adjustment unit is electrical connected with the Main Control Unit, for according to current outside environment light, knot
Human eye sensory perceptual system is closed, control driving voltage is obtained；
The driving voltage control unit is electrical connected with Main Control Unit, electrowetting display screen, to according to master control
The display brightness of the control driving voltage driving electrowetting display screen of device unit input processed.
Further, described for obtaining control driving voltage in conjunction with human eye sensory perceptual system according to current outside environment light
Specifically: the brightness adjustment unit is corresponding using the human eye sensory perceptual system calculating lower image grayscale of being shown of current environment light
Brightness, and according to the brightness inquiry Electrowetting device display brightness to be driven being calculated with environment light and driving voltage DL-
AL-V variation relation curve, finally obtains corresponding driving voltage.
Compared with prior art, the invention has the following beneficial effects: the present invention can adjust electricity according to the brightness of environment
The display brightness for soaking display screen, being capable of effective protection human eye.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the present invention.
Fig. 2 is the functional block diagram of the embodiment of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As shown in Figure 1, present embodiments providing a kind of method for changing adjustment electrowetting display brightness with environment light, in real time
External environmental light is measured, judges whether current outside environment light belongs in default range, when external environmental light is lower than default model
When enclosing, adjusted in external environmental light to default range by Light Source Compensation；According to current outside environment light, perceived in conjunction with human eye
System adjusts the display brightness of Electrowetting device.
In the present embodiment, described according to current outside environment light, in conjunction with human eye sensory perceptual system (HVS, Human Visual
System), adjust the display brightness of Electrowetting device specifically includes the following steps:
Step S1: the corresponding intensity level L of gray level for the image of being shown is determinedd, and for distinguish weak environment light and
The ambient light threshold A of strong environment light；Wherein, ambient light threshold A can be obtained by subjective testing, may be based on the perceptual distortion factor
(Dist) just cause the relationship for being distorted the threshold value of (JND) with human eye.
Based on luminance distortion and contrast distortion, perceptual distortion factor D ist is defined are as follows:
In formula, d (x, y) indicates the perceptual distortion at pixel (x, y)；The distortion of Dist expression entire image all pixels
Average value, N is the pixel quantity of image, and α and β are to be set as α=β herein to characterize relative importance between the two
=1, c (x, y) and l (x, y) are contrast distortion and luminance distortion.
In formula, μin(x, y) and μout(x, y) be respectively (x, y) surrounding pixel point indoors with being averaged under outdoor environment
Value, δin(x, y) and δout(x, y) is variance.Ambient light threshold is to be distorted (JND) threshold value caused by Dist is equal to human eye just
When luminous intensity.
Step S2: human eye sensory perceptual system formula is used, human eye eye response R under standard environment is obtained；Wherein human eye perceives
System equations are as follows:
In formula, α, β are constant (usual value is respectively 0.69,5.83)；
Step S3: obtaining environment light A' at this time, calculates the corresponding human eye of environment light A' by human eye sensory perceptual system formula
Eye response R':
In formula,For the corresponding intensity level of the lower image gray levels of being shown of environment light A'；
To guarantee that human eye obtains identical human eye vision response under different environment light, R'=R is enabled, is perceived by human eye
System equations obtain the corresponding intensity level of the lower image gray levels of being shown of environment light A'
Step S4: check that the Electrowetting device display brightness to be driven is closed with environment light and driving voltage DL-AL-V variation
It is curve, inquires intensity levelCorresponding driving voltage, to utilize the driving voltage adjustment Electrowetting device inquired
Display brightness.
Wherein, the DL-AL-V variation relation curve negotiating experiment or existing experimental data obtain.
As shown in Fig. 2, the present embodiment additionally provides, a kind of based on described above to change adjustment electrowetting with environment light aobvious
The device for showing the method for brightness, including electrowetting display screen, Main Control Unit and the photosensitive unit being electrical connected with it, bright
Spend adjustment unit, image display gray level information extraction unit, driving voltage control unit, Light Source Compensation unit；
The photosensitive unit is electrical connected with the Main Control Unit, to detect external environmental light and will test result
It is transmitted to Main Control Unit；
Described image shows that grayscale information extraction unit is connected with the Main Control Unit, for extracting current display figure
The gray scale intensities information of picture, and the information extracted is transferred to the Main Control Unit；
The Light Source Compensation unit is electrical connected with the Main Control Unit, for being lower than default model when external environmental light
When enclosing and (making brightness when display screen visible brightness), environment light is adjusted to preset range by the control of main controller unit；
The brightness adjustment unit is electrical connected with the Main Control Unit, for according to current outside environment light, knot
Human eye sensory perceptual system is closed, control driving voltage is obtained；
The driving voltage control unit is electrical connected with Main Control Unit, electrowetting display screen, to according to master control
The display brightness of the control driving voltage driving electrowetting display screen of device unit input processed.
In the present embodiment, described for obtaining control driving in conjunction with human eye sensory perceptual system according to current outside environment light
Voltage specifically: the brightness adjustment unit calculates the lower image grayscale of being shown pair of current environment light using human eye sensory perceptual system
The brightness answered, and according to the brightness inquiry Electrowetting device display brightness to be driven being calculated with environment light and driving voltage
DL-AL-V variation relation curve, finally obtains corresponding driving voltage.
Preferably, in the present embodiment, the Light Source Compensation unit can use any light source, to work as external environmental light
Increase ambient brightness when not enough.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (4)
1. a kind of method for changing adjustment electrowetting display brightness with environment light, it is characterised in that: real-time measurement external environmental light,
Judge whether current outside environment light belongs in default range, when external environmental light is lower than preset range, is mended by light source
It repays in adjustment external environmental light to default range；Electrowetting is adjusted in conjunction with human eye sensory perceptual system according to current outside environment light
The display brightness of device.
2. a kind of method for changing adjustment electrowetting display brightness with environment light according to claim 1, it is characterised in that:
It is described according to current outside environment light, in conjunction with human eye sensory perceptual system, adjust Electrowetting device display brightness specifically include it is following
Step:
Step S1: the corresponding intensity level L of gray level for the image of being shown is determinedd, and for distinguishing weak environment light and strong environment
The ambient light threshold A of light；
Step S2: human eye sensory perceptual system formula is used, human eye eye response R under standard environment is obtained；Wherein human eye sensory perceptual system
Formula are as follows:
In formula, α, β are constant；
Step S3: obtaining environment light A' at this time, calculates the corresponding human eye vision of environment light A' by human eye sensory perceptual system formula
Respond R':
In formula,For the corresponding intensity level of the lower image gray levels of being shown of environment light A'；
To guarantee that human eye obtains identical human eye vision response under different environment light, R'=R is enabled, human eye sensory perceptual system is passed through
Formula obtains the corresponding intensity level of the lower image gray levels of being shown of environment light A'
Step S4: check that the Electrowetting device display brightness to be driven is bent with environment light and driving voltage DL-AL-V variation relation
Line inquires intensity levelCorresponding driving voltage, to utilize the display of the driving voltage adjustment Electrowetting device inquired
Brightness.
3. a kind of device based on the method for any of claims 1 or 2 for changing adjustment electrowetting display brightness with environment light,
It is characterized in that: including electrowetting display screen, Main Control Unit and the photosensitive unit being electrical connected with it, brightness adjustment list
Member, image display gray level information extraction unit, driving voltage control unit, Light Source Compensation unit；
The photosensitive unit is electrical connected with the Main Control Unit, to detect external environmental light and will test result transmission
To Main Control Unit；
Described image shows that grayscale information extraction unit is connected with the Main Control Unit, for extracting current display image
Gray scale intensities information, and the information extracted is transferred to the Main Control Unit；
The Light Source Compensation unit is electrical connected with the Main Control Unit, for being lower than preset range when external environmental light
When, environment light is adjusted to preset range by the control of main controller unit；
The brightness adjustment unit is electrical connected with the Main Control Unit, is used for according to current outside environment light, in conjunction with people
Eye sensory perceptual system obtains control driving voltage；
The driving voltage control unit is electrical connected with Main Control Unit, electrowetting display screen, to according to master controller
The display brightness of the control driving voltage driving electrowetting display screen of unit input.
4. a kind of device for changing adjustment electrowetting display brightness with environment light according to claim 3, it is characterised in that:
It is described to be used to, in conjunction with human eye sensory perceptual system, obtain control driving voltage specifically: the brightness tune according to current outside environment light
Whole unit calculates the corresponding brightness of the lower image grayscale of being shown of current environment light using human eye sensory perceptual system, and according to calculating
To the brightness inquiry Electrowetting device display brightness to be driven with environment light and driving voltage DL-AL-V variation relation curve,
Finally obtain corresponding driving voltage.
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| CN201910204397.9A CN109754761B (en) | 2019-03-18 | 2019-03-18 | Method and device for adjusting electrowetting display brightness along with change of ambient light |
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| CN201910204397.9A CN109754761B (en) | 2019-03-18 | 2019-03-18 | Method and device for adjusting electrowetting display brightness along with change of ambient light |
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| CN110737418A (en) * | 2019-10-22 | 2020-01-31 | 重庆立方展览展示有限公司 | digitalized exhibition comprehensive application system combined with natural environment |
| 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 |
| CN114783387A (en) * | 2022-05-25 | 2022-07-22 | 福州大学 | Color electrowetting electronic paper image contrast enhancement method adaptive to ambient light |
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