CN105895055B - A kind of screen luminance adjustment method and regulating system, display device - Google Patents
A kind of screen luminance adjustment method and regulating system, display device Download PDFInfo
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- CN105895055B CN105895055B CN201610373024.0A CN201610373024A CN105895055B CN 105895055 B CN105895055 B CN 105895055B CN 201610373024 A CN201610373024 A CN 201610373024A CN 105895055 B CN105895055 B CN 105895055B
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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
Abstract
The invention discloses a kind of screen luminance adjustment method and regulating system, display device.The screen luminance adjustment method and regulating system, display device are preset with the comfortable ratio region of ambient intensity/backlight light intensity, only when the ratio of extraneous light intensity/backlight light intensity is beyond default comfortable ratio region, backlight illumination can be just modified, can reduce does not have the frequent amendment problem of practical function largely to visual effect, the power consumption of screen is reduced, increases the durability and usage time of battery.
Description
Technical field
The present invention relates to screen display technology field, more particularly to it is a kind of screen luminance adjustment method and regulating system, aobvious
Showing device.
Background technology
The Showing Effectiveness On Screen of the mobile terminals such as mobile phone, flat board and ambient intensity and the big break of backlight light intensity
Manner of breathing closes, and the content on mobile terminal display screen curtain can be caused to be difficult to for brighter external environment it is clear that user's generally use will move
Dynamic terminal presses close to the modes of eyes to solve the problems, such as not seeing；Dark external environment can cause on mobile terminal display screen curtain
Content it is quite dazzling, and such case is often ignored by user, and this eyesight to user brings serious infringement.
Then it is strong that ambient instantly is calculated by detecting ambient intensity in existing screen luminance adjustment method
Backlight optimal brightness corresponding to degree, and backlight voltage is adjusted, reach the purpose of adjusting backlight luminance.But user is using movement
During terminal often in walk process, in room while going to another side, small change can also occur for its light, this micro-
The small light change visual effect actual on screen is that do not have influential, and still, screen can also become to this small light
Frequently backlight amendment is made in change, causes screen power consumption too high, the short-life defect of battery.
The content of the invention
In order to solve above-mentioned the deficiencies in the prior art, the present invention provide a kind of screen luminance adjustment method and regulating system,
Display device.The screen luminance adjustment method and regulating system, display device are only in extraneous light intensity/backlight light intensity
Current ratio when exceeding comfortable ratio region, backlight illumination can be just modified, it is possible to reduce do not have to visual effect largely
There is the frequent amendment problem of practical function, reduce the power consumption of screen, increase the durability and usage time of battery.
The technical problems to be solved by the invention are achieved by the following technical programs：
A kind of screen luminance adjustment method, this method comprise the following steps：
S1：The optimum ratio and its downward ratio of default ambient intensity/backlight light intensity, up-regulation ratio；
S2：Calculate the comfortable ratio region for obtaining ambient intensity/backlight light intensity；
S3：Detection obtains ambient intensity and backlight light intensity of the screen in current environment；
S4：Calculate the current ratio for obtaining ambient intensity/backlight light intensity of the screen in current environment；
S5：By current ratio compared with comfortable ratio region：If current ratio is in comfortable ratio region, carry on the back
The brightness of light is without changing；If current ratio, by adjusting the brightness of backlight, makes current ratio not in comfortable ratio region
Return in comfortable ratio region.
Further, in the step S5, if currently ratio is not in comfortable ratio region, by adjusting backlight
Brightness, current ratio is set to be equal to default optimum ratio.
Further, in the step S5, the method for the adjusting backlight luminance be by adjust the electric current of backlight come
Adjust the brightness of backlight.
Further, if current ratio is more than comfortable ratio region, calculate current ratio and return to comfortable ratio region
Or the comfortable brightness of backlight needed for optimum ratio or the comfortable electric current of backlight or optimum current corresponding to optimal brightness, and improve the back of the body
Photoelectricity flow to comfortable electric current or optimum current.
Further, if current ratio is less than comfortable ratio region, calculate current ratio and return to comfortable ratio region
Or the comfortable brightness of backlight needed for optimum ratio or the comfortable electric current of backlight or optimum current corresponding to optimal brightness, and reduce the back of the body
Photoelectricity flow to comfortable electric current or optimum current.
Further, in the step S1, the adjustment region of backlight illumination is also preset with, in the step S5, if
Current ratio returns to comfortable ratio region or the comfortable brightness of backlight needed for optimum ratio or optimal brightness beyond the default back of the body
The adjustment region of brightness, then send alarm signal.
A kind of screen intensity regulating system, including：
First brightness detection unit：Ambient intensity level is obtained for detecting；
Second brightness detection unit：Backlight light intensity value is obtained for detecting；
Control module：Its input connects the output of first brightness detection unit and the second brightness detection unit respectively
End, for detecting the ambient intensity level obtained and backlight to first brightness detection unit and the second brightness detection unit
Light intensity value carries out calculating contrast, and light output regulation electric current of supporting or opposing.
Further, the control module includes：Comparing unit, computing unit, memory cell, default unit and electric current control
Unit processed, the comparing unit connect respectively first brightness detection unit, the second brightness detection single unit, computing unit,
Memory cell, default unit and current control unit；Wherein,
Default unit：For presetting the optimum ratio of ambient intensity/backlight light intensity and its lowering ratio, up-regulation
Ratio；
Memory cell：For storing the optimum ratio of default ambient intensity/backlight light intensity and its lowering ratio
Example, up-regulation ratio, the result of calculation of computing unit；
Computing unit：For calculating the comfortable ratio region of ambient intensity/backlight light intensity；According to described first
The testing result of brightness detection unit and the second brightness detection unit calculates the current ratio of ambient intensity/backlight light intensity
Value；Calculating adjusts current ratio to the comfortable electric current of backlight or optimum current needed for comfortable ratio region or optimum ratio；
Comparing unit：The current ratio that computing unit is calculated, enter with default comfortable ratio region in memory cell
Row compares；
Current control unit：According to the comparative result of comparing unit, comfortable electric current or optimum current are exported to backlight.
Further, the control module also includes alarm unit, and the memory cell is also preset with the tune of back facet current
Region is saved, if the comfortable electric current or optimum current of current control unit output, not in adjustment region, the alarm unit is then sent out
Go out alarm signal.
A kind of display device, including it is above-mentioned in any described screen intensity regulating system.
The present invention has the advantages that：
（1）The screen luminance adjustment method and regulating system, display device are by presetting ambient intensity/backlight light
The optimum ratio and its downward ratio of intensity, up-regulation ratio, the brightness regulation scope of backlight can be made to adapt to have difference photosensitive
The crowd of sensitivity and reading habit；
（2）Introduce the comfortable ratio area concept of ambient intensity/backlight light intensity, it is possible to reduce largely to vision
Effect does not have the frequent amendment problem of practical function, reduces the power consumption of screen, increases the durability and usage time of battery；
（3）The adjustment region of back facet current is preset with, if the comfortable electric current or optimum current needed for backlight are beyond default
The adjustment region of back facet current, then send alarm signal to user, can not only call user's attention eye, moreover it is possible to prevents that backlight is electric
There is the excessive bad phenomenon for causing backlight damage or the too low influence display effect of electric current of electric current after flowing through regulation；
（4）By surveying the intrinsic brilliance of backlight, backlight is inputted using constant pressure, and it is bright to adjust backlight only to adjust back facet current
Degree, Calculation of photovoltage backlight illumination is carried on the back compared to by detecting, then to the prior art that backlight voltage is adjusted, can prevented
Due to backlight aging, cause deviation be present between backlight voltage that detection obtains and intrinsic brilliance.
Brief description of the drawings
Fig. 1 is the flow chart of screen luminance adjustment method provided by the invention；
Fig. 2 is the structure chart of regulating system provided by the invention；
Fig. 3 is graph of a relation of the back facet current with backlight light intensity of 17.8V constant pressure backlights.
Embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment one
As shown in figure 1, a kind of screen luminance adjustment method, this method comprise the following steps：
S1：The optimum ratio Q and its downward ratio P1, up-regulation ratio P2 of default ambient intensity/backlight light intensity；
Optimum ratio Q and its up-regulation ratio P1, downward ratio P2 concrete numerical value in the present embodiment are user according to certainly
Body is set to the susceptibility and reading habit of light, and concrete mode is：User passes through in the environment of any light intensity
The mode of adjusting backlight luminance, make screen intensity reach itself be accustomed to eye it is optimal, and set ambient intensity now/
The ratio of backlight light intensity is optimum ratio Q；P1 and P2 can be accustomed to being set according to user itself, and P1 and the small expressions of P2 are used
Family requires reading quality higher, it is necessary to according to ambient brightness to the real-time regulation of backlight illumination, if P1 and P2 is big to represent user couple
Reading quality requires relatively low, it is possible to reduce the frequent variation of backlight illumination.
S2：Calculate the comfortable ratio region [Q1, Q2] for obtaining ambient intensity/backlight light intensity, wherein Q1=Q*
（1-P1）, Q2=Q*（1+P2）；
Such as if default optimum ratio Q=5, downward ratio P1=10%, up-regulation ratio P2=20%, its comfortable ratio area
Domain is [Q1=5*（1-10%）, Q2=5*（1+20%）], P1 and P2 can be with equal.
S3：Detection obtains ambient intensity A and backlight light intensity B of the screen in current environment；
In the present embodiment, the ambient intensity and backlight light intensity of current environment can be examined by light intensity sensor
Survey, naturally it is also possible to detected by other any of methods.
Preferably, the backlight light intensity can also be calculated by detecting back facet current, and backlight light intensity exists
Increase in certain scope with the increase of back facet current；Be illustrated in figure 3 a kind of back facet current of 17.8V constant pressures backlight with
The relation of backlight light intensity, wherein, X-axis is back facet current, and unit is mA, and Y-axis is backlight light intensity, and unit is cd/ ㎡.
S4：Calculate the current ratio M=A/ for obtaining ambient intensity/backlight light intensity of the screen in current environment
B；
S5：Current ratio M and comfortable ratio region [Q1, Q2] are compared：If current ratio M is in comfortable ratio area
In domain [Q1, Q2], then the brightness of backlight is without changing；If current ratio M then passes through not in comfortable ratio region [Q1, Q2]
The brightness of backlight is adjusted, current ratio is returned in comfortable ratio region [Q1, Q2].
The screen luminance adjustment method of the present embodiment introduces the comfortable ratio region of ambient intensity/backlight light intensity
Concept, only when the current ratio of extraneous light intensity/backlight light intensity exceeds comfortable ratio region, just backlight is entered
Row brightness regulation, avoid in the prior art due to caused by the reasons such as the walking about of user, the minor variations of indoor UV light
The frequent amendment problem of backlight illumination, backlight power consumption is reduced, on the premise of visual effect is not influenceed, increases the continuation of the journey of battery
Ability.
Preferably, in step s 5, if current ratio M is not in comfortable ratio region [Q1, Q2], then by adjusting backlight
Brightness, current ratio M is equal to default optimum ratio Q.
In the step S5, the mode of the adjusting backlight luminance is to adjust backlight by adjusting the electric current of backlight
Brightness, its regulation process are specially：
（1）If current ratio Q1≤M≤Q2, back facet current is without regulation；
（2）If current ratio M ＞ Q2, calculate the current ratio M that sends as an envoy to and return to comfortable ratio region [Q1, Q2] or optimal ratio
The comfortable electric current or optimum current corresponding to the comfortable brightness of backlight or optimal brightness needed for value Q, and improve back facet current to relax
Suitable electric current or optimum current；
（3）If current ratio M ＜ Q1, calculate the current ratio M that sends as an envoy to and return to comfortable ratio region [Q1, Q2] or optimal ratio
The comfortable electric current or optimum current corresponding to the comfortable brightness of backlight or optimal brightness needed for value Q, and reduce back facet current to relax
Suitable electric current or optimum current.
Preferably, detection calculates the current ratio M and comfortable ratio [Q1, Q2] after backlight illumination regulation again, prevents simultaneously
Correct output current and the deviation of brightness.
The present embodiment is preferred but is not limited to backlight using constant pressure input, passes through photo resistance in parallel or the side of adjustable resistance
Formula adjusts back facet current；By surveying the intrinsic brilliance of backlight, backlight is inputted using constant pressure, only adjusts back facet current to adjust
Backlight illumination, Calculation of photovoltage backlight illumination is carried on the back compared to by detecting, then to the prior art that backlight voltage is adjusted, can
Deviation be present to prevent from, due to backlight aging, causing detecting between obtained backlight voltage and intrinsic brilliance.
As the further optimization of the present embodiment, in step sl, the adjustment region of backlight illumination is also preset with, in step
In S5, if the comfortable brightness of the backlight calculated or optimal brightness exceed the adjustment region of default backlight illumination, police is sent
Show signal.
Specific implementation is：The adjustment region of back facet current is preset in step sl, in step s 5, adjusts backlight electricity
Before stream, compare the adjustment region of the comfortable electric current or optimum current and default back facet current needed for regulation backlight, if backlight
Required comfortable electric current or optimum current is then adjusted back facet current to comfortable electricity in the adjustment region of default back facet current
Stream or optimum current；If the comfortable electric current or optimum current needed for backlight not in the adjustment region of default back facet current,
Send alarm signal.
The concrete numerical value of the upper and lower bound of the adjustment region of the default back facet current according to backlight model not
Same and different, its upper limit not should be greater than the maximum current that the backlight can bear, and its lower limit is no less than screen under darkroom
Surface brightness be 50cd/ ㎡（cd/㎡：Luminous intensity unit）When corresponding electric current.
The alarm signal can be the conventional aspect such as letter signal, voice signal, light signal.
Because the regulation of back facet current is the damage that limited and too high or too low electric current can all accelerate backlight,
Therefore the regulation to back facet current is needed to make a limitation；When the ambient of environment is too strong or excessively dark, backlight is adjusted to comfortable
If the adjustment region of comfortable electric current or optimum current higher or lower than back facet current needed for brightness or optimal brightness, then to making
User sends alarm signal, can so remind user to pay attention to using eye, also be avoided that backlight is damaged.
Embodiment two
As shown in Fig. 2 a kind of screen intensity regulating system, including：
First brightness detection unit：Ambient intensity level A is obtained for detecting；
Second brightness detection unit：Backlight light intensity value B is obtained for detecting；
Control module：Its input connects the output of first brightness detection unit and the second brightness detection unit respectively
End, for detecting the ambient intensity level A and the back of the body that obtain to first brightness detection unit and the second brightness detection unit
Light light intensity value B carries out calculating contrast, and light output regulation electric current of supporting or opposing.
In the present embodiment, the first brightness detection module and the second brightness detection module preferably but are not limited to light intensity biography
Sensor, the ambient intensity level and backlight light intensity value can also be detected using other any known methods.
Preferably, second brightness detection unit can also be connected on it is in backlight loop or in parallel with backlight electric power
Current sensor, backlight light intensity increase in certain scope with the increase of back facet current；It is illustrated in figure 3 one kind
The back facet current of 17.8V constant pressure backlights and the relation of backlight light intensity, wherein, X-axis is back facet current, and unit is mA, and Y-axis is backlight
Light intensity, unit are cd/ ㎡.
The control module includes：Comparing unit, computing unit, memory cell, default unit and current control unit, institute
State comparing unit connect respectively first brightness detection unit, the second brightness detection single unit, computing unit, memory cell,
Default unit and current control unit；Wherein,
Default unit：For preset the optimum ratio Q of ambient intensity/backlight light intensity and its lower ratio P1,
Up-regulation ratio P2；
Memory cell：For storing the optimum ratio Q of default ambient intensity/backlight light intensity and its lowering ratio
Example P1, up-regulation ratio P2, the result of calculation of computing unit；
Such as if default optimum ratio Q=5, downward ratio P1=10%, up-regulation ratio P2=20%, its comfortable ratio area
Domain is [Q1=5*（1-10%）, Q2=5*（1+20%）], P1 and P2 can be with equal.
Computing unit：For calculating the comfortable ratio region [Q1, Q2] of ambient intensity/backlight light intensity；According to
The testing result of first brightness detection unit and the second brightness detection unit calculates ambient intensity/backlight light intensity
Current ratio M=A/B；Calculating is adjusted current ratio M to the comfortable electric current of backlight needed for [Q1, Q2] or optimum ratio Q or most
Good electric current；
Comparing unit：The current ratio M that computing unit is calculated, with default comfortable ratio region in memory cell
[Q1, Q2] is compared；
Current control unit：According to the comparative result of comparing unit, comfortable electric current or optimum current are exported to backlight.
Optimum ratio Q and its up-regulation ratio P1, downward ratio P2 concrete numerical value in the present embodiment are user according to certainly
Body is set to the susceptibility and reading habit of light, and specific setting means is：User in the environment of any light intensity,
By way of adjusting backlight luminance, reach screen intensity and itself be accustomed to eye optimal, and set ambient now
The ratio of intensity/backlight light intensity is optimum ratio Q；P1 and P2 can be accustomed to being set according to user itself, and P1 and P2 are small
Represent that user requires higher, it is necessary to according to ambient brightness to the real-time regulation of backlight illumination, if the big expressions of P1 and P2 to reading quality
User requires relatively low to reading quality, it is possible to reduce the frequent variation of backlight illumination.
The external world that the control module detects to obtain by the first light-intensity test unit and the second light-intensity test unit
Light intensity A and backlight light intensity B, current ratio M=A/B is calculated using computing unit；Compare current ratio M with it is comfortable
Ratio region [Q1, Q2], and backlight illumination is adjusted, current ratio M is returned to comfortable ratio region [Q1, Q2].
Preferably, the more current ratio M of the control module and comfortable ratio region [Q1, Q2], and backlight illumination is entered
Row regulation, makes current ratio M be equal to default optimum ratio Q.
The control module is specially by back facet current being adjusted come adjusting backlight luminance：
（1）If current ratio Q1≤M≤Q2, back facet current is without regulation；
（2）If current ratio M ＞ Q2, calculate the current ratio M that sends as an envoy to and return to comfortable ratio region [Q1, Q2] or optimal ratio
The comfortable electric current or optimum current corresponding to the comfortable brightness of backlight or optimal brightness needed for value Q, and improve back facet current to relax
Suitable electric current or optimum current；
（3）If current ratio M ＜ Q1, calculate the current ratio M that sends as an envoy to and return to comfortable ratio region [Q1, Q2] or optimal ratio
The comfortable electric current or optimum current corresponding to the comfortable brightness of backlight or optimal brightness needed for value Q, and reduce back facet current to relax
Suitable electric current or optimum current.
Preferably, detection calculates the current ratio M and comfortable ratio [Q1, Q2] after backlight illumination regulation again, prevents simultaneously
Correct output current and the deviation of backlight illumination.
The present embodiment is preferred but is not limited to backlight using constant pressure input, passes through photo resistance in parallel or the side of adjustable resistance
Formula adjusts back facet current；By surveying the intrinsic brilliance of backlight, and using the input of backlight constant pressure, to adjust the side of back facet current
Formula carrys out adjusting backlight luminance, carries on the back Calculation of photovoltage backlight illumination compared to by detecting, then show to what backlight voltage was adjusted
There is technology, can prevent from due to backlight aging, causing to detect between obtained backlight voltage and intrinsic brilliance deviation be present.
The display device of the present embodiment introduces the concept in the comfortable ratio region of ambient intensity/backlight light intensity,
Only when current ratio exceeds comfortable ratio region, brightness regulation just is carried out to backlight, avoided in the prior art due to making
The frequent amendment problem of the backlight illuminations caused by reason such as the walking about of user, the minor variations of indoor UV light, reduce backlight work(
Consumption, on the premise of visual effect is not influenceed, increases the endurance of battery.
As the further optimization of the present embodiment, the control module also includes alarm unit, and the memory cell is also pre-
Adjustment region provided with back facet current, if current ratio returns to comfortable ratio region or the comfortable electric current of backlight needed for optimum ratio
Or optimum current then sends alarm signal beyond the adjustment region of default backlight illumination.
Specific implementation is：If comfortable electric current or optimum current needed for backlight are in the regulatory region of default back facet current
In domain, then back facet current is adjusted to comfortable electric current or optimum current；If the comfortable electric current or optimum current needed for backlight do not exist
In the adjustment region of default back facet current, then alarm signal is sent.
The concrete numerical value of the upper and lower bound of the adjustment region of the default back facet current according to backlight model not
Same and different, its upper limit not should be greater than the maximum current that the backlight can bear, and its lower limit is no less than screen under darkroom
Surface brightness be 50cd/ ㎡（cd/㎡：Luminous intensity unit）When corresponding electric current.
The alarm signal can be the conventional aspect such as letter signal, voice signal, light signal.
Because the regulation of back facet current is the damage that limited and too high or too low electric current can all accelerate backlight,
Therefore the regulation to back facet current is needed to make a limitation；When the ambient intensity of environment is too strong or excessively dark, backlight adjust to
If the adjustment region of comfortable electric current or optimum current higher or lower than back facet current needed for comfortable brightness or optimal brightness, then
Alarm signal is sent to user, can so remind user to pay attention to using eye, also be avoided that backlight is damaged.
Embodiment three
A kind of display device, including above-mentioned screen intensity regulating system.
The display device also includes backlight module and the display module being arranged on backlight module, and described first is bright
Degree detection unit is preferred but is not limited to the light intensity sensor being arranged in the non-display area of display module upper surface；Described
Two brightness detection units are preferred but are not limited to be arranged on the light intensity sensing in the BM occlusion areas of the TFT substrate of display module
Device.
Preferably, second brightness detection unit can also be connected on it is in backlight loop or in parallel with backlight electric power
Current sensor, backlight light intensity increase in certain scope with the increase of back facet current；It is illustrated in figure 3 one kind
The back facet current of 17.8V constant pressure backlights and the relation of backlight light intensity, wherein, X-axis is back facet current, and unit is mA, and Y-axis is backlight
Light intensity, unit are cd/ ㎡.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore the limitation to proprietary region of the present invention is interpreted as, as long as the skill obtained using the form of equivalent substitution or equivalent transformation
Art scheme, it all should fall within the protection zone of the present invention.
Claims (9)
1. a kind of screen luminance adjustment method, it is characterised in that this method comprises the following steps：
S1：The optimum ratio and its downward ratio of default ambient intensity/backlight light intensity, up-regulation ratio；
S2：Calculate the comfortable ratio region for obtaining ambient intensity/backlight light intensity；
S3：Detection obtains ambient intensity and backlight light intensity of the screen in current environment；
S4：Calculate the current ratio for obtaining ambient intensity/backlight light intensity of the screen in current environment；
S5：By current ratio compared with comfortable ratio region：If current ratio is in comfortable ratio region, backlight
Brightness is without changing；If current ratio, by adjusting the brightness of backlight, returns to current ratio not in comfortable ratio region
In comfortable ratio region.
2. screen luminance adjustment method according to claim 1, it is characterised in that in the step S5, if current ratio
Value, then by adjusting the brightness of backlight, makes current ratio be equal to default optimum ratio not in comfortable ratio region.
3. screen luminance adjustment method according to claim 1 or 2, it is characterised in that in the step S5, the tune
The method of section backlight illumination is to adjust the brightness of backlight by adjusting the electric current of backlight.
4. screen luminance adjustment method according to claim 3, it is characterised in that if current ratio is more than comfortable ratio area
Domain, then calculate that current ratio returns to comfortable ratio region or the comfortable brightness of backlight needed for optimum ratio or optimal brightness institute is right
The comfortable electric current of backlight or optimum current answered, and back facet current is improved to comfortable electric current or optimum current.
5. screen luminance adjustment method according to claim 3, it is characterised in that if current ratio is less than comfortable ratio area
Domain, then calculate that current ratio returns to comfortable ratio region or the comfortable brightness of backlight needed for optimum ratio or optimal brightness institute is right
The comfortable electric current of backlight or optimum current answered, and back facet current is reduced to comfortable electric current or optimum current.
6. screen luminance adjustment method according to claim 1 or 2, it is characterised in that also default in the step S1
There is the adjustment region of backlight illumination, in the step S5, if current ratio is returned to needed for comfortable ratio region or optimum ratio
The comfortable brightness of backlight or optimal brightness beyond the adjustment region of default backlight illumination, then send alarm signal.
A kind of 7. screen intensity regulating system, it is characterised in that including：
First brightness detection unit：Ambient intensity level is obtained for detecting；
Second brightness detection unit：Backlight light intensity value is obtained for detecting；
Control module：Its input connects the output end of first brightness detection unit and the second brightness detection unit respectively,
For detecting the ambient intensity level and backlight light that obtain to first brightness detection unit and the second brightness detection unit
Line strength value carries out calculating contrast, and light output regulation electric current of supporting or opposing；Wherein,
The control module includes：Comparing unit, computing unit, memory cell, default unit and current control unit, the ratio
Connect first brightness detection unit, the second brightness detection single unit, computing unit, memory cell, default respectively compared with unit
Unit and current control unit；Wherein,
Default unit：For presetting the optimum ratio of ambient intensity/backlight light intensity and its lowering ratio, up-regulation ratio
Example；
Memory cell：For store default ambient intensity/backlight light intensity optimum ratio and its lower ratio,
Tune ratio, the result of calculation of computing unit；
Computing unit：For calculating the comfortable ratio region of ambient intensity/backlight light intensity；According to first brightness
The testing result of detection unit and the second brightness detection unit calculates the current ratio of ambient intensity/backlight light intensity；
Calculating adjusts current ratio to the comfortable electric current of backlight or optimum current needed for comfortable ratio region or optimum ratio；
Comparing unit：The current ratio that computing unit is calculated, compared with the comfortable ratio region in memory cell；
Current control unit：According to the comparative result of comparing unit, comfortable electric current or optimum current are exported to backlight.
8. screen intensity regulating system according to claim 7, it is characterised in that it is single that the control module also includes warning
Member, the memory cell are also preset with the adjustment region of back facet current, if the comfortable electric current of current control unit output or optimal
For electric current not in adjustment region, the alarm unit then sends alarm signal.
9. a kind of display device, it is characterised in that including the screen intensity regulating system described in claim 7 or 8.
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| CN105895055A (en) | 2016-08-24 |
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