CN104637452B - Airborne LCD brightness Automatic adjustment method - Google Patents
Airborne LCD brightness Automatic adjustment method Download PDFInfo
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- CN104637452B CN104637452B CN201310564006.7A CN201310564006A CN104637452B CN 104637452 B CN104637452 B CN 104637452B CN 201310564006 A CN201310564006 A CN 201310564006A CN 104637452 B CN104637452 B CN 104637452B
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- 238000005286 illumination Methods 0.000 claims abstract description 63
- 230000004300 dark adaptation Effects 0.000 claims abstract description 14
- 230000004438 eyesight Effects 0.000 claims abstract description 8
- 230000004301 light adaptation Effects 0.000 claims description 9
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
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Abstract
The present invention relates to airbome liquid crystal display automatic brightness adjustment methods in aircraft cockpit automatic light control system.The present invention automatically adjusts to airborne indicator brightness under round-the-clock variation luminous environment, in this method, first, judges that ambient light changes on display according to low-light (level), high illumination photosensitive sensor output valve on display；Again, display object brightness is determined by ambient light variation on display, according to display object brightness and present intensity difference, present intensity is adjusted to meet the rate of change of brightness of human eye vision requirement.The present invention makes full use of bright, the dark adaptation characteristic of human eye, realizes the reasonable adjusting of airborne indicator brightness under round-the-clock variation luminous environment, and the deficiency of the luminous environments occasion such as cloud cannot be handled into cloud, go out very well by compensating for current display brightness adjusting method.
Description
Technical field
The invention belongs to aircraft cockpit lighting area, more particularly to a kind of airborne LCD brightness automatic adjustment
Method.
Background technology
Modern large aircraft task function is constantly strengthened, and accordingly, is sharply increased with the relevant display information of aerial mission, is
Meet presentation of information needs, multiple integrative electronic display devices are integrated in cockpit.It is high-strength by high-altitude multi-angle during navigation
The variation of the sound state luminous environment such as horizontal light direct projection influences when light irradiation, cloud layer reflected glare, daybreak/dusk, particularly with destroying
It hits for the aircraft that machine, attack plane etc. need high-speed flight, maneuver warfare, as it include that axis rolls, level is turned over
Rolling vertically rolls or cuts spissatus layer etc., and it is very big to irradiate the variation span of environmental light brightness over the display, and speed is also very
Soon, it is seen then that luminous environment complex in aircraft cockpit under the conditions of all-weather flight.To ensure crew in sound state luminous environment
Under can understand viewing show information, it is desirable that display brightness with drive extravehicular environment light variation can accordingly adjust.
Present display brightness mainly using manual regulative mode, is seen when ambient light variation causes crew that cannot understand
When seeing, by brightness regulation knob on crew's rotating display device.Due to being equipped with multiple displays in cockpit, to lighten
Cockpit all displays then need to adjust brightness regulation knob on each display successively, are especially entering cloud, are going out the environment brights such as cloud
When secretly variation is more notable, frequent adjusting brightness of display is often needed, this can undoubtedly aggravate crew's burden, shadow
Ring flight efficiency.Therefore, airborne indicator brightness starts using automatic adjustment mode, changes automatic adjust according to seat indoor environment light
Brightness is saved, i.e., when ambient light brightens, lightens display；When ambient light is dimmed, display is dimmed.But for
Enter cloud, go out the occasion of the environmental light brightness such as cloud, rolling variation span greatly, the regulating effect of existing automatic brightness adjustment method is not
It is good, show as that ambient light during into cloud is dimmed suddenly, and display brightness also can be dimmed suddenly；Ambient light brightens suddenly when going out cloud, shows
Show that device brightness can also brighten suddenly, the flickering variation of display brightness does not consider bright, the dark adaptation characteristic of human eye, causes
Environment bright cannot understand information on viewing display when being secretly changed significantly.
Therefore, inventor is based on existing solution situation, proposes a kind of airborne LCD brightness automatic adjustment side
Method, this method is in adjusting brightness of display based on ambient light amplitude of variation, transformation period and human eye light dark adaptation characteristic, display
Device brightness change complies fully with the requirement of human eye vision.
The content of the invention
The purpose of the present invention is directed to a kind of airborne LCD brightness Automatic adjustment method, can accurately really
Ambient light on display is made to change, and according to human eye light dark adaptation characteristic adjusting brightness of display.
To achieve the above object, technical scheme is as follows：A kind of airborne LCD brightness is adjusted automatically
Section method, which is characterized in that first, judged according to low-light (level), high illumination photosensitive sensor output valve on display on display
Ambient light changes；Again, display object brightness is determined by ambient light variation on display, according to display object brightness and worked as
Preceding luminance difference adjusts present intensity to meet the rate of change of brightness of human eye vision requirement.
It is concretely comprised the following steps：
A. judge that ambient light variation comprises the following steps on display according to photosensitive sensor output valve：
A, judge low-light (level), high illumination sensor values, gather low-light (level), the output valve of high illumination sensor respectively, judge
Whether low-light (level) sensor brightness value and high illumination sensor brightness value are more than the first illuminance setting value, and the first illuminance setting value is
If low light environment condition meets, then it is assumed that display is in higher illuminance environment at this time, by the output valve of high illumination sensor
As ambient light illumination on display, ambient light illumination determines that flow terminates；Otherwise step b is gone to；
B, judge that present displays determine sensor used by ambient light illumination, if present displays determine ambient lighting
Brightness value is low-light (level) sensor output value used by degree, then it is assumed that display is in low light environment, and low-light (level) is sensed
For the output valve of device as ambient light illumination on display, ambient light illumination determines that flow terminates；Otherwise step c is gone to；
C, low-light (level), high illumination sensor output value are determined whether, judges whether low-light (level) sensor brightness value is more than
Whether the first illuminance setting value or high illumination sensor brightness value are more than the second illuminance setting value, if condition meets, then it is assumed that aobvious
Show on device that ambient light is just gradually changed from higher illuminance to low-light (level), but it is also unchanged shift to low light environment, at this point, by high illumination
For the output valve of sensor as ambient light illumination on display, ambient light illumination determines that flow terminates；Otherwise it is assumed that on display
Ambient light just from low-light (level) gradually to higher illuminance change, but it is also unchanged shift to higher illuminance environment, at this point, low-light (level) is sensed
For the output valve of device as ambient light illumination on display, ambient light illumination determines that flow terminates；
B. comprised the following steps according to display object brightness and present intensity difference adjusting brightness of display：
D, program initialization, reads sensor values on display, and the sensor includes low-light (level) sensor and high illumination
Sensor judges current environment illuminance according to step A, searches display brightness dimming curve relation table, determines that display is worked as
Preceding brightness changes display brightness；Initialization time variable、,For ambient light variation duration,To be upper
The time of brightness change, T, TN are arranged to present system time；
E, ambient light illumination on display is updated, reads sensor values on display, current environment light is judged according to step A
Illumination；
F, display object brightness is updated, by ambient light illumination on display, searches display brightness dimming curve relation
Table, obtains display object brightness, defined in display brightness dimming curve table between ambient light illumination and display brightness
Correspondence；
G, object brightness and the identity property of present intensity, if the two is equal, renewal time variable are judged,, T,
TN is arranged to present system time, and display brightness is constant, return to step e；Otherwise step h is gone to；
H, the size of comparison object brightness and present intensity if object brightness is more than present intensity, increases present intensity,
And return to step e, if object brightness is less than present intensity, reduce present intensity, and return to step e.
In wherein step h, if object brightness is more than present intensity, object brightness and the difference of present intensity are calculated, by bright
Degree mathematic interpolation goes out present intensity and transforms to time needed for object brightness；Renewal time variableFor current system when
Between, and calculate the difference of time variable T and time variable TN.If, increase according to human eye light adaptation curve table
Present intensity, human eye light adaptation curve table define the relation between display brightness and human eye light adaptation time, and human eye is bright suitable
Curve table is answered to test to obtain by vision work efficiency, and changes display brightness, while renewal time variable according to present intensity、For present system time, return to step e；If, renewal time variable、For present system time, show
Show that device brightness is constant, return to step e；
If object brightness is less than present intensity, the difference of present intensity and object brightness is calculated, is calculated by luminance difference
Present intensity transforms to the time needed for object brightness；Renewal time variableFor present system time, and calculate the time
The difference of variable T and time variable TN.If, reduce present intensity, human eye according to human eye dark adaptation curve table
Dark adaptation curve table defines the relation between display brightness and human eye dark adaptation time, and human eye dark adaptation curve table is by vision
Work efficiency tests to obtain, and changes display brightness, while renewal time variable according to present intensity、For current system when
Between, return to step e；If, renewal time variable、For present system time, display brightness is constant, returns
Return step e.
Compared with prior art, the present invention has following advantage：
The present invention taken into full account cloud, wears that cloud equiluminous is a wide range of, fast-changing luminous environment occasion, realizes round-the-clock
The soft variation of display brightness, complies fully with human eye vision requirement in the range of illumination variation, makes up current display brightness certainly
The dynamic adjusting method deficiency that display brightness is mutated when luminous environment quickly changes.
Description of the drawings
Fig. 1 is to judge ambient light on display according to photosensitive sensor output valve according to one preferred embodiments of the present invention
The flow chart of variation.
Fig. 2 is to be adjusted to show according to display object brightness and present intensity difference according to one preferred embodiments of the present invention
Show the flow chart of device brightness.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is according to a kind of flow chart of airborne LCD brightness Automatic adjustment method provided by the invention.
With reference to Fig. 1, method according to a preferred embodiment of the present invention includes：
1. judge that ambient light variation comprises the following steps on display according to photosensitive sensor output valve：
1）Judge low-light (level), high illumination sensor values.Low-light (level), the output valve of high illumination sensor are gathered respectively, if low
Illuminance transducer acquisition brightness value be, high illumination sensor acquisition brightness value be, judge、It is whether big
In the first illuminance setting valueIf condition meets, depending on brightness valueFor ambient light illumination on display, ambient light illumination determines
Flow terminates；Otherwise step 2 is gone to）；
2）Judge that present displays determine the currently employed sensor of ambient light illumination, if present displays determine that environment shines
Sensor is low-light (level) sensor used by degree, then regardsFor ambient light illumination on display, ambient light illumination determines flow
Terminate；Otherwise step 3 is gone to）；
3）Further judge low-light (level), high illumination sensor values.Judge low-light (level) sensor brightness valueWhether the is more than
One illuminance setting valueOr high illumination sensor brightness valueWhether the second illuminance setting value is more thanIf condition meets, depending onFor ambient light illumination on display, ambient light illumination determines that flow terminates；OtherwiseFor ambient light illumination on display, ring
Border illuminance determines that flow terminates.
The first illuminance setting value is converted into the transition point of higher illuminance ambient light, the ring for low light environment light in the present invention
Border light transition occurs mainly at dawn；Second illuminance setting value is converted into low light environment light for higher illuminance ambient light
Transition point, which occurs mainly at dusk, to avoid control with an automatic light meter in daybreak, at dusk ambient light
Illumination constantly switches when selecting, and the first illuminance setting value and the second illuminance setting value should consider low-light (level) sensing when determining
Device measurement range, higher illuminance sensor measurement range and higher illuminance environmental field.First illuminance setting value be generally 60lx ~
120lx, the second illuminance setting value are generally 150lx ~ 300lx.
2. comprised the following steps according to display object brightness and present intensity difference adjusting brightness of display：
1）Program initialization.Sensor values on display is read, current environment illuminance is judged according to step 1, is determined aobvious
Show device present intensity, change display brightness；Initialization time variable、,For ambient light variation duration,For the time of last brightness change, T, TN are arranged to present system time；
2）Update ambient light illumination on display.Sensor values on display is read, current environment light is judged according to step 1
Illumination；
3）Update display object brightness.By ambient light illumination on display, display brightness dimming curve relation is searched
Table obtains display object brightness；
4）Judge object brightness and the identity property of present intensity.If the two is equal, renewal time variable,, by T,
TN is arranged to present system time, and display brightness is constant, return to step 2）；Otherwise step 5 is gone to）；
5）Comparison object brightness and the size of present intensity.
If object brightness is more than present intensity, object brightness and the difference of present intensity are calculated, is calculated by luminance difference
Present intensity transforms to the time needed for object brightness；Renewal time variableFor present system time, and calculate the time
The difference of variable T and time variable TN.If, determine that present intensity increases according to human eye light adaptation curve table
Value, and change display brightness, while renewal time variable according to present intensity、For present system time, return
Return step 2）；If, renewal time variable、, T, TN are arranged to present system time, display brightness
It is constant, return to step 2）；
If object brightness is less than present intensity, the difference of present intensity and object brightness is calculated, by luminance difference meter
Calculating present intensity transforms to the time needed for object brightness；Renewal time variableFor present system time, and count
The difference of evaluation time variable T and time variable TN.If, determined according to human eye dark adaptation curve table current bright
Spend decreasing value, and change display brightness, while renewal time variable according to present intensity、For current system when
Between, return to step 2）；If, renewal time variable、For present system time, display brightness is constant, returns
Return step 2）.
Display brightness dimming curve relation table, human eye light adaptation curve table and human eye dark adaptation curve table are by this field
Those of ordinary skill is obtained by testing, and is not belonging to the scope of this field protection, therefore details are not described herein.
Claims (1)
1. a kind of airborne LCD brightness Automatic adjustment method, which is characterized in that this method comprises the following steps：A、
Ambient light variation on display is judged according to low-light (level), high illumination photosensitive sensor output valve on display；B, by display
Ambient light variation determines display object brightness, according to display object brightness and present intensity difference, to meet human eye vision
It is required that rate of change of brightness adjust present intensity；
Step A comprises the following steps：A, judge low-light (level), high illumination sensor values, gather low-light (level), high illumination sensor respectively
Output valve, judge whether low-light (level) sensor brightness value and high illumination sensor brightness value are more than the first illuminance setting value, the
If an illuminance setting value meets for low light environment condition, then it is assumed that display is in higher illuminance environment at this time, by high illumination
For the output valve of sensor as ambient light illumination on display, ambient light illumination determines that flow terminates；Otherwise step b is gone to；b、
Judge that present displays determine sensor used by ambient light illumination, if used by present displays determine ambient light illumination
Brightness value is low-light (level) sensor output value, then it is assumed that display is in low light environment, by the output valve of low-light (level) sensor
As ambient light illumination on display, ambient light illumination determines that flow terminates；Otherwise step c is gone to；C, low photograph is determined whether
Degree, high illumination sensor output value judge whether low-light (level) sensor brightness value is more than the first illuminance setting value or high illumination passes
Whether sensor brightness value is more than the second illuminance setting value, if condition meets, then it is assumed that ambient light is just by higher illuminance on display
Gradually to low-light (level) change, but it is also unchanged shift to low light environment, at this point, using the output valve of high illumination sensor as display
Upper ambient light illumination, ambient light illumination determine that flow terminates；Otherwise it is assumed that on display ambient light just from low-light (level) gradually to compared with
High illumination change, but it is also unchanged shift to higher illuminance environment, at this point, using the output valve of low-light (level) sensor as ring on display
Border illuminance, ambient light illumination determine that flow terminates；
Step B comprises the following steps：D, program initialization, reads sensor values on display, and the sensor includes low-light (level)
Sensor and high illumination sensor judge current environment illuminance according to step A, search display brightness dimming curve relation
Table determines display present intensity, changes display brightness；Initialization time variable、,For holding for ambient light variation
The continuous time,For the time of last brightness change, T, TN are arranged to present system time；E, ambient light on display is updated
Illumination reads sensor values on display, judges current environment illuminance according to step A；F, display object brightness is updated, by
Ambient light illumination on display searches display brightness dimming curve relation table, obtains display object brightness, display brightness
Correspondence between ambient light illumination and display brightness defined in dimming curve table；G, object brightness and current bright is judged
The identity property of degree, if the two is equal, renewal time variable,, T, TN are arranged to present system time, display brightness
It is constant, return to step e；Otherwise step h is gone to；H, the size of comparison object brightness and present intensity is worked as if object brightness is more than
Preceding brightness then increases present intensity, and return to step e, if object brightness is less than present intensity, reduces present intensity, and returns
Return step e；
In step h, if object brightness is more than present intensity, object brightness and the difference of present intensity are calculated, by luminance difference meter
Calculating present intensity transforms to the time needed for object brightness；Renewal time variableFor present system time, and calculate
The difference of time variable T and time variable TNIf, increase present intensity according to human eye light adaptation curve table,
Human eye light adaptation curve table defines the relation between display brightness and human eye light adaptation time, human eye light adaptation curve table by
Vision work efficiency tests to obtain, and changes display brightness, while renewal time variable according to present intensity、To be currently
It unites the time, return to step e；If, renewal time variable、For present system time, display brightness is constant,
Return to step e；If object brightness is less than present intensity, the difference of present intensity and object brightness is calculated, is calculated by luminance difference
Go out present intensity and transform to time needed for object brightness；Renewal time variableFor present system time, and when calculating
Between the difference of variable T and time variable TNIf, reduce present intensity, people according to human eye dark adaptation curve table
Eye dark adaptation curve table defines the relation between display brightness and human eye dark adaptation time, and human eye dark adaptation curve table is by regarding
Feel that work efficiency tests to obtain, and change display brightness, while renewal time variable according to present intensity、For current system
Time, return to step e；If, renewal time variable、For present system time, display brightness is constant, returns
Return step e.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310564006.7A CN104637452B (en) | 2013-11-14 | Airborne LCD brightness Automatic adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310564006.7A CN104637452B (en) | 2013-11-14 | Airborne LCD brightness Automatic adjustment method |
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| Publication Number | Publication Date |
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| CN104637452A CN104637452A (en) | 2015-05-20 |
| CN104637452B true CN104637452B (en) | 2018-06-01 |
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| CN1890701A (en) * | 2003-12-13 | 2007-01-03 | 三星电子株式会社 | Display apparatus and control method thereof |
| CN1801386A (en) * | 2005-01-05 | 2006-07-12 | 上海乐金广电电子有限公司 | DVD player capable of automatically adjusting display brightness |
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