CN200941292Y - Quality displaying regulator based on environmental sensing - Google Patents
Quality displaying regulator based on environmental sensing Download PDFInfo
- Publication number
- CN200941292Y CN200941292Y CNU2006201238304U CN200620123830U CN200941292Y CN 200941292 Y CN200941292 Y CN 200941292Y CN U2006201238304 U CNU2006201238304 U CN U2006201238304U CN 200620123830 U CN200620123830 U CN 200620123830U CN 200941292 Y CN200941292 Y CN 200941292Y
- Authority
- CN
- China
- Prior art keywords
- parameter
- brightness
- transparency
- display
- display system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The utility model, providing a display quality regulation device and used to regulate a display quality of a display system based on an environment luminance and/or an air transparency of the outside, comprises an environmental assessment module which is connected with a parameter operation module and induces the environment luminance and/or the air transparency to get influence values which are then transmitted to the parameter operation module as a calculation rule; a parameter operation module which is connected with a parameter execution module and calculates the influence values to get regulation parameters which are then transmitted to the parameter execution module; and a parameter execution module which is connected with a display system and regulates the brightness and/or the Gamma coefficient of the display system by using regulation parameters, thus achieving a display quality which is more suitable for human eyes.
Description
Technical field
The utility model relates to the demonstration field, more specifically, relates to the display quality regulating device based on environment induction, especially based on the LED display quality regulating device of environment induction.
Background technology
In the PN junction of some semiconductor material, the minority carrier of injection and majority carrier compound tense can discharge the form of unnecessary energy with light, thereby electric energy directly is converted to luminous energy.PN junction adds reverse voltage, and minority carrier is difficult to inject, so not luminous.This diode that utilizes the making of injection electroluminescence principle is called for short LED (Light Emitting Diode) light emitting diode
The glow color of LED is relevant with material and the technology of making LED with luminescence efficiency, present widely used three kinds of the red, green, blues that have.Because LED operating voltage low (only 1.5-3V), can active illuminating and certain brightness is arranged, brightness can use voltage (or electric current) to regulate again, itself is shock-resistant again, anti-vibration, life-span long (100,000 hours), so in large-scale display device, display mode and the LED display mode of still not having other at present are equal to.
Fig. 1 shows a kind of planimetric map of conventional nitride light emitting semiconductor device.Conventional nitride light emitting semiconductor device 10 shown in Figure 1 is made like this, promptly, on the Sapphire Substrate (not shown), form n type nitride semiconductor layer 12, active layer (not shown), p type nitride semiconductor layer 14 and ohmic contact layer 15 at first in order, and etching part active layer, p type nitride semiconductor layer 14 and ohmic contact layer 15, to form mesa structure, expose the part upper surface of n type nitride semiconductor layer 12 then.In addition, conventional nitride light emitting semiconductor device 10 has n electrode 17 in the upper surface of the exposure of n type nitride semiconductor layer 12, and has p electrode 16 on the upper surface of ohmic contact layer 15.N electrode 17 and p electrode 16 are electrically connected to outer electrode by wire bond or upside-down mounting welding, and are injected into electric current, thus, produce light in active layer.
Red and the green LED display screen of making as a pixel of putting together is called double-colored screen or color line screen; Three kinds of LED of red, green, blue are shielded or full-color screen three looks to the display screen of putting together as a pixel.
No matter make monochromatic, double-colored or three looks screen with LED, desire the luminosity of each LED of display image pattern of wants pixel and all must regulate, the fine degree of its adjusting is exactly the gray shade scale of display screen.Gray shade scale is high more, and the image of demonstration is just fine and smooth more, and color is also abundant more, and corresponding display control program is also complicated more.General 256 grades of image gray, color transition is very soft, and the coloured image of 16 grades of gray scales, the color transition boundary line is fairly obvious.So color LED screen is current all to require to make 256 grades of gray scales.
The LED electronic display be light harvesting electricity and computer technology in the high-tech product of one, LED display can be according to following condition stub:
Environment for use: LED display is divided into indoor LED display and outdoor LED display by environment for use.
Show Color: LED display is divided into single-primary-color LED display screen (containing the pseudo-colours LED display) by Show Color, dual base color LED display and full color (three primary colours) LED display.Can be divided into 16,32,64,128,256 grades of gray scale LED display etc. again by gray level.
Display performance: LED display is divided into text LED display, picture and text LED display by display performance, computer video LED display, television video LED display and market LED display etc.The market LED display generally comprises the LED display of purposes such as security, interest rate, futures.
Basic luminous point: in the non-market class LED display, indoor LED display can be divided into display screens such as Φ 3mm, Φ 3.75mm, Φ 5mm, Φ 8mm and Φ 10mm by the LED single-point diameter that adopts; Outdoor LED display can be divided into LED display such as Φ 19mm, Φ 22mm and Φ mm26 by the pixel diameter that adopts.Can divide 2.0cm (0.8inch), 2.5cm (1.0inch), 3.0cm (1.2inch), 4.6cmm (1.8inch), 5.8cm (2.3inch), 7.6cm LED display such as (3inch) by the charactron size that adopts in the market class LED display.
Fig. 2 shows the block scheme of a kind of traditional LED display system.
By above structured flowchart as seen, LED display system 200 mainly comprises with the lower part:
LED display body and loudspeaker comprise video display screen body 202, bar screen 204 and loudspeaker 203;
Make main frame and support equipment, comprise computing machine 206, keyboard and mouse 208, scanner 210, network adapter 212;
Main control system and communication system comprise controller and address card 214;
The video interface card comprises video card 216; And
The video-audio signal source comprises various video/audio equipment 218 such as DVD, VCD, CATV (cable television).
Total system is control and processing enter with the computing machine, adopt computer software and hardware technology, realize LED display body displaying video audio frequency, make system can conveniently show various graph text informations, scanner can be with inputs such as various pictures, manuscripts, and video image is by the multimedia card collection, and computer can further be created, video recording, TV can directly be broadcast, and make the screen body show more rich and varied.No matter on the airport, place such as station, square, showroom, lecture hall, enterprise office, the LED electronic display can both have been given play to great effect.
LED display is as a kind of emerging display media, high speed development along with large scale integrated circuit and computer technology, obtained develop rapidly, it is compared with traditional display media one colorful neon bulb, pixel pipe video wall, four look magnetic turnover panels, with advantages such as its brightness height, the dynamic image display effect is good, fault is low, less energy consumption, long service life, displaying contents is various, display mode is abundant, ratio of performance to price height, as the display media of a new generation, all trades and professions have been widely used in.Particularly the gray scale display screen is used for enterprises and institutions' image propaganda and the demonstration of public place information with its modern attitude, has become the display media that can not be substituted.
In addition, lighting source also is an important directions of its development with LED.Because the serviceable life of common cold-cathode tube and fluorescent tube is generally about 20,000 hours, and the life-span of LED can reach 80,000 hours, and unique advantages such as high brightness, low consumption are arranged again, makes led light source have bright prospect.
The demonstration of tradition LED display system is not consider environmental parameter, that is, no matter what situation is environmental parameter be, traditional LED display system all shows in the same way.Yet, there is bigger influence in environmental factor to the visual effect of traditional LED display system, so traditional LED display system may produce relatively poor visual effect when environmental parameter changes, come the visual impact of describe environment factor to traditional LED display system below in conjunction with accompanying drawing.
The environmental parameter that the visual effect of LED display system is produced material impact have following these:
● ambient brightness (Surroundings Brightness)
Ambient brightness is the induction of vision to ambient light intensity, and it has reacted object (non-active illuminating object), and under ambient light, human eye is to the perception of its bright degree.Table 1 shows the ambient brightness Parameter Map.The ambient brightness that various environmental factors can reach is as shown in table 1.
Table 1
● air transparency (Air Transparence)
The air transparency has reflected the degree that atmosphere is transparent, and on visual performance, atmospheric transparency is good more, and people's sighting distance is far away more, and the object resolving ability is also strong more.
Border brightness of the equal finger ring of environmental parameter hereinafter and air transparency.
In addition, various environmental factors have very big influence to environmental parameter, and by influencing environmental parameter and then having influence on the visual effect of traditional LED display system.
Next, the main several environmental factors that cause that ambient brightness and air transparency change of discussing can be divided into following four classes substantially.
● light refraction and reflection in the clouds
Light is by cloud layer the time, and a part of light can be by cloud layer reflected back outer space; Part light can not arrive ground because refraction changes direction; The saturating cloud layer of a part of in addition light meeting shines ground.This kind factor mainly influences ambient brightness.
● artificial light
On the avenue square, transport hub, conference and exhibition center, light and spacious places such as office building, except daylight factor, artificial light also is one of factor that influences ambient brightness.In addition, comparatively seal places such as office building, production base at some, artificial light is the key factor that influences ambient brightness.
● airborne macroparticle
Airborne macroparticle can produce refraction and absorption (being photoextinction) to light, thereby influences ambient brightness and air transparency.Table 2 shows the macroparticle property list.But haze is to the macroparticle property list shown in the concrete reference table 2 of the situation that influences of environmental parameter.
Table 2
| Weather phenomenon | Composition | Steam | Particle size | Thickness | Color | The border |
| Mist | Water droplet, ice crystal | Saturated | 1-100 micron naked eyes as seen | 10 1-10 2Rice | Milky, Bluish white | Clear |
| Haze | Dirt, sulfuric acid, nitric acid, hydrocarbon etc. | Unsaturated | 0.001-10 the micron naked eyes be cannot see | The 1-3 kilometer | Yellow, orange grey | Unintelligible |
Usually bring airborne macroparticle to mainly contain following two kinds of situations:
1) mist
Mist is the product of ground layer water in air airsetting knot by being suspended in the aerosol systems that small water droplet in the surface air or ice crystal are formed in a large number.The existence of mist can reduce the air transparency, and visibility is worsened, and also can reduce ambient brightness simultaneously, makes the environment deepening.
2, haze (also claiming grey haze or mist and clouds in the twilight)
Particles such as dust in air, sulfuric acid, nitric acid, organic carbon hydrogen compound also can make the atmosphere muddiness, and the visual field is fuzzy and cause visibility to worsen and the ambient brightness reduction.
Next, with the visual impact of concrete analysis environmental parameter to the active illuminating object.
Any place, the different time in a day or under different job requirements has different ambient brightnesss; The the rising and falling of the sun, the black clouds of sky, artificial factors such as illumination all can change ambient brightness; And under the different occasions, the factor that influences ambient brightness may not be identical, and these factors are also different to the size of ambient brightness influence.Such as in the open air (place that does not have artificial light fixture as highway, factories and miness etc.) influence ambient brightness have only natural cause (as daytime alternately, the variation of weather etc.); Such as at avenue, the factor that influences ambient brightness also has artificial light (street lamp, building lighting) etc. except natural cause; Such as the indoor hall of performing in a radio or TV programme, ambient brightness mainly requires relevant with its program lighting scene again.Same atmospheric condition or quality also can influence air transparency, particularly outdoor location.And influence factor such as mist, the flue dust etc. of atmospheric transparency.
Because the visual characteristic of human eye, environmental parameter has not little difference to the visual impact of luminous object and the visual impact of common objects.Ambient brightness is high more, and common objects is also just bright more, and it is visual; But luminophor, ambient brightness can influence the luminance difference of itself and surrounding environment, thereby influence its visual brightness and visuality.Owing to different refraction and the absorptivity (because macroparticle itself also have certain color) of airborne macroparticle to different colours light, the air transparency also can influence the visual characteristics such as brightness, gray scale and sighting distance of luminophor in addition.
Be example below with the street lamp, analysis environments brightness and air transparency are to the influence of vision.
Visual experience from human eye, the street lamp on daytime does not have the street lamp at night bright (although the street lamp intrinsic brightness is the same), and evening the far light that can see street lamp, then need daytime closely just can see, therefore same light source is under different lightness environment, the visual brightness of human eye is different, has also influenced sighting distance.As a rule ambient brightness is high more, and the visual brightness of a certain light source is just low more, and the visible sighting distance of light source is also low more.
In addition, the street lamp during dense fog is looked dim, and is yellow partially sometimes, because macroparticle can absorb and reflect the light of street lamp in the air, and blue light had bigger absorptivity, so just cause the change of brightness and gray scale.
Below with the visual impact of analysis environments parameter to the LED demonstration.
It is to come display video/picture-text image by active illuminating that LED shows, with respect to street lamp, it requires higher to vision quality, therefore examines environmental parameter closely LED is shown that the influence of vision quality is particularly important.The LED display system is having higher requirements aspect brightness (Luminance), gray scale (Colors), contrast (Contrast), sighting distance (Visual Distance), the refresh rate qualities such as (FreshRate) usually.And environmental parameter can be generally environment (background) brightness (Surroundings Brightness) and these two important indicators of air transparency (Air Transparence) to what the LED vision quality impacted, and the vision quality that can be affected is brightness, contrast, sighting distance and gray scale.
Obviously, be maintained fixed brightness, be applied to LED demonstration under the low-light level environment, can bring visual brightness and contrast to cross high influence to be fit to the parameter (as brightness, contrast, gamma coefficient etc.) that LED shows under the bright light environments if LED shows; Visual effect descends like this, causes visual pollution, also brings energy dissipation.On the contrary, be applied to be fit to LED shows under the dark surrounds parameter (as brightness, contrast, gamma coefficient etc.) that LED shows under the low-light level environment, can bring that degradation influences under the not enough and contrast of visual brightness; Can cause brightness not enough like this, not reach display requirement, influence system effectiveness.
Have again, be applied to LED demonstration under the low transparency environment, can bring degradation under visual brightness reduction, gray scale decline, the sighting distance, influence system effectiveness to be fit to the parameter (as brightness, contrast etc.) that LED shows under the high grade of transparency environment.On the contrary, be applied to LED demonstration under the low transparency environment, can bring visual brightness, contrast to cross high influence to be fit to the parameter (as brightness, contrast etc.) that LED shows under the low transparency environment; Visual effect descends like this, causes visual pollution, also brings energy dissipation.
Can learn from above analysis, environmental factor and environmental parameter all can significantly impact the visual effect of LED display system by environmental factor, yet traditional LED display system can not overcome these influences effectively, thereby shows relatively poor visual effect.
Therefore, people need a kind of display quality based on environment induction to regulate solution, can solve the problem in the above-mentioned correlation technique, to eliminate environmental parameter and the environmental factor adverse effect to the visual effect of display system.
The utility model content
The utility model aims to provide a kind ofly regulates the device (be called for short G-EYE) of display quality based on environment induction, and it has been eliminated environmental optics and has polluted adverse effect to the visual effect of display system.
According to an aspect of the present utility model, a kind of display quality regulating device is provided, be used for regulating the display quality of display system based on the ambient brightness and/or the air transparency in the external world, comprise: the environmental assessment module, be connected to the parameter computing module, its induced environment brightness and/or air transparency send the parameter computing module to as basis then to obtain influence value; The parameter computing module is connected to the parameter execution module, and it carries out computing with adjusted parameter to influence value, sends the parameter execution module then to; And the parameter execution module, being connected to display system, it utilizes brightness and/or the gamma coefficient of regulating the parameter regulation display system, to obtain to be more suitable for the display quality of human eye.
In above-mentioned display quality regulating device, the parameter computing module carries out following at least a kind of computing to influence value: when ambient brightness is high more, then make brightness big more, otherwise otherwise; When ambient brightness is high more, then make the gamma coefficient more little, otherwise otherwise; When the air transparency is high more, then make brightness more little, otherwise otherwise; When the air transparency is high more, then make the gamma coefficient big more, otherwise otherwise.
In above-mentioned display quality regulating device, also comprise the expert parameter bag, it is stored on the storer, is connected to the parameter computing module, comprise the set of optical environment parameter and the parameter of display system own, the parameter computing module utilizes the expert parameter bag further to revise regulating parameter.
In above-mentioned display quality regulating device, it is one of following that the expert parameter bag comprises at least: the optical property parameter of maximum ambient brightness and minimum ambient brightness, maximum environment transparency and minimum environment transparency, transparency collection and environment temperature Relation Parameters, brightness collection and environment temperature Relation Parameters, system and LED display medium, LED drive current characterisitic parameter.
In above-mentioned display quality regulating device, the environmental assessment module comprises: with reference to lamp, provide reference brightness to photodiode; Photodiode, induced environment brightness and induction reference brightness transmit the influence value of analog form then to A/D converter; A/D converter converts the influence value of analog form to digital signal, and sends control computing center to; Control computing center utilizes digital signal to calculate the air transparency; And switch, it is connected to reference to lamp, and control is with reference to the Kai Heguan of lamp.
In above-mentioned display quality regulating device, control computing center utilizes formula
Calculate the air transparency, wherein L represents reference brightness, and r represents that with reference to the distance between lamp and the photodiode δ is the air extinction coefficient that is used to represent the air transparency.
In above-mentioned display quality regulating device, the induction of environmental assessment module approaches the induction curve of human eye.
In above-mentioned display quality regulating device, the induction peak value of environmental assessment module is in around the 500nm wavelength of light.
In above-mentioned display quality regulating device, the working range of environmental assessment module is-30 ℃ to+90 ℃.
In above-mentioned display quality regulating device, display system comprises: LED display system, plasma display system, liquid crystal display systems, projection display system, OLED display system, investigation of projection display system or CRT display system.
By technique scheme, the utility model has been realized following technique effect:
This technical scheme can be widely applied to road traffic, square amusement, performs in a radio or TV programme the hall, building show and occasion such as outdoor advertising, it possesses the intelligence adjusting that conforms, so that better display quality to be provided, balance visual effect and environmental requirement better, guaranteeing under the display quality, can reduce environmental optics and pollute the influence of environmental parameter for example and environmental factor the visual effect of LED display system.
Other features and advantages of the utility model will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the utility model.The purpose of this utility model and other advantages can realize and obtain by specifically noted structure in the instructions of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows a kind of planimetric map of conventional nitride light emitting semiconductor device;
Fig. 2 shows the block scheme of a kind of traditional LED display system;
Fig. 3 shows according to the display quality regulating device based on environment induction of the present utility model;
Fig. 4 shows the environment induction system 400 according to an embodiment of environmental assessment module 302 of the present utility model;
Fig. 5 shows according to the Δ of an embodiment of the present utility model and regulates brightness-Δ ambient brightness curve map;
Fig. 6 shows according to the Δ of an embodiment of the present utility model and regulates brightness-Δ transparency curve;
Fig. 7 shows the gamma coefficient-ambient brightness curve map according to an embodiment of the present utility model; And
Fig. 8 shows the gamma coefficient-transparency curve map according to an embodiment of the present utility model.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 3 shows according to the display quality regulating device based on environment induction of the present utility model.
As shown in Figure 3, comprise according to the display quality regulating device 300 based on environment induction of the present utility model:
Environmental assessment module 302, the extraneous optics situation (for example, ambient brightness or air transparency) of its induction to obtain influence value, sends parameter computing module 304 to then as basis;
Parameter computing module 304, it carries out computing with adjusted parameter (for example, regulating brightness, gamma coefficient) to influence value, sends parameter execution module 306 then to; And
Alternatively, environmental assessment module 302 is according to current ambient brightness that collects and air transparency, judges current optics situation, basis is provided for parameter computing module 304.
As can be seen from the above description, this device 300 has been realized collection ambient brightness and air transparency, according to COMPREHENSIVE CALCULATING, regulate the gamma (Gamma that LED shows, brief note is for γ) curve, brightness, thereby realize that LED shows the self-adaptation to environment, with balance vision quality and energy-conserving and environment-protective better.
At first the process of regulating the LED display brightness based on environment induction according to an embodiment of the present utility model is described in conjunction with Fig. 5 and Fig. 6.
Fig. 5 shows according to the Δ of an embodiment of the present utility model and regulates brightness-Δ ambient brightness curve map.
Fig. 5 has shown that ambient brightness changes and the relation of regulating the brightness change.Parameter computing module 304 utilizes funtcional relationship shown in Figure 5, and the basis that provided of environmental assessment module 302, calculates the brightness regulation parameter, sends parameter execution module 306 then to and correspondingly regulates.
As can be seen from the above description, ambient brightness changes obvious more, regulates brightness and also can significantly change, and this meets the observating characteristic to optical environment of human eye.Also can draw from figure, ambient brightness is bright more, and it is also big more to regulate brightness value.
For example, the ambient brightness influence value that environmental assessment module 302 is provided is the brightness value 1000Lux of broken sky, parameter computing module 304 funtcional relationship of utilizing Fig. 5 to reflect is calculated then, just can calculate corresponding brightness regulation parameter, send parameter execution module 306 then to and carry out correspondingly brightness regulation.Wherein, Fig. 5 transverse axis correspondence be ambient brightness value after the environmental assessment module 302 assessment computings, longitudinal axis correspondence be the adjusting brightness (being luminance difference) of calculating.Same Fig. 6 transverse axis correspondence also be environment transparence value after the 302 assessment computings of environmental assessment module, longitudinal axis correspondence be the adjusting brightness of calculating.
Yet Fig. 5 and Fig. 6 provide desirable mathematical model, can not reflect the physical characteristics of LED display and environmental optics situation fully truly, in general, also need to carry out the parameter correction.Therefore, preferably, display quality regulating device 300 also comprises expert parameter bag 308, expert parameter bag 308 is the set of various optical environment parameters and the parameter of display system own, alternatively, comprising: the optical property parameter of maximum ambient brightness and minimum ambient brightness, maximum environment transparency and minimum environment transparency, transparency collection and environment temperature Relation Parameters, brightness collection and environment temperature Relation Parameters, system and LED display medium, LED drive current characterisitic parameter etc.
Like this, parameter computing module 304 utilizes funtcional relationship shown in Figure 5, and the basis that provided of environmental assessment module 302, and the calculation of parameter of also utilizing expert parameter bag 308 to be provided goes out the brightness regulation parameter, sends parameter execution module 306 then to and correspondingly regulates.Alternatively, the expert parameter bag is by the nonvolatile memory in the software writing system.Parameter computing module 304 extracts the corresponding parameters bag according to the current environment assessment result from expert parameter bag 308, by calculating, it is passed to parameter execution module 306.
The brightness regulation of the utility model according to the air transparency described below.
Fig. 6 shows according to the Δ of an embodiment of the present utility model and regulates brightness-Δ transparency curve.
Fig. 6 has shown that the air transparency changes and the relation of regulating the brightness change.Parameter computing module 304 utilizes funtcional relationship shown in Figure 5, and the basis that provided of environmental assessment module 302, and the parameter that is provided with reference to expert parameter bag 308, thereby calculate the brightness regulation parameter, send parameter execution module 306 then to and correspondingly regulate.Concrete computation process is similar to above the description of Fig. 5, here for the sake of brevity, repeats no more.
As can be seen from the figure the transparency change is obvious more, regulates brightness and also can the first mate change, to guarantee LED brightness quality.Also can draw from figure, the transparency degree is bright more, and it is more little to regulate brightness value.
In addition, preferably, the curve brightness regulation can be provided with threshold values Lt, and it is under any ambient brightness and transparency, and the curve brightness minimum of LED is to guarantee the display brightness quality.
Illustrate below in conjunction with Fig. 7 and Fig. 8 and to carry out the process that LED shows that gamma curve is regulated based on environment induction according to an embodiment of the present utility model.
In LED showed, it was brighter to need high gray scale to show under daytime, and need reduce high gray scale intensities night to obtain better bottom ash degree observation effect.Same under the lower environment of transparency, except promoting display brightness, also to improve the demonstration contrast.Both of these case can be regulated by gamma curve and realize.
Fig. 7 shows the gamma coefficient-ambient brightness curve map according to an embodiment of the present utility model.
γ max/ γ min is respectively maximum/minimum gamma coefficient among Fig. 7, and Lmin/Lmax is respectively the minimum/maximum ambient brightness that needs to regulate the gamma coefficient.Its regulative mode is stepped adjusting, promptly has only ambient brightness to change and is accumulated to some, the gamma curve of just regulating current demonstration.Concrete computation process is similar to above the description of Fig. 5, here for the sake of brevity, repeats no more.
Fig. 8 shows the gamma coefficient-transparency curve map according to an embodiment of the present utility model.
δ min/ δ max is respectively the minimum/maximum transparency that needs to regulate the gamma coefficient among Fig. 8.Its regulative mode is stepped adjusting, promptly has only the environment transparency to change and is accumulated to some, the gamma curve of just regulating current demonstration.Concrete computation process is similar to above the description of Fig. 5, here for the sake of brevity, repeats no more.
Describe in detail according to embodiment of the present utility model below in conjunction with accompanying drawing.
Specifically, Fig. 4 shows the environment induction system 400 according to an embodiment of environmental assessment module 302 of the present utility model.
As shown in Figure 4, environment induction system 400 comprises: with reference to lamp 402, photodiode 404, A/D converter 406, control computing center 408 and switch 410.Wherein,
With reference to lamp 402, provide reference brightness to photodiode 404;
Photodiode 404, induced environment brightness and induction reference brightness transmit the influence value of analog forms then to A/D converter 406;
A/D converter 406 converts the influence value of analog form to digital signal, to provide digital signal to control computing center 408;
Control computing center 408 utilizes digital signal to calculate the air transparency; And
Switch 410, it is connected to reference to lamp, is used to control the Kai Heguan with reference to lamp.
The principle of work of environmental assessment module 302 shown in Figure 4 is as follows:
When closing,, be ambient brightness just by the data that A/D is converted to reference to lamp.After turning on reference to lamp, the data by A/D is converted to are the brightness L (lux) of reference lamp by the light behind the transmission range r; Apart under the r, the air transparency is poor more identical, and the brightness data that obtains is more little.
Usually air transparency and visibility are the parameters that is similar to, and atmospheric transparency and visibility are a kind of linear relationships, so native system uses visibility calculating formula to obtain the air transparency.According to the close moral of Cauchy (Koschmieder) law, to being the black matrix object of background with horizontal sky, object and the contrast of background apparent brightness can be expressed as:
ε=e
-r σ(formula 1)
The r-optical range
δ-air extinction coefficient
ε-visual contrast threshold values
In conjunction with native system, when surveying the air transparency, the relation of brightness L and extinction coefficient δ also can be expressed as follows:
L=e
-r σ(formula 2)
From formula 3 as can be known, apart under the r, if the brightness L that measures is high more, then air extinction coefficient δ is more little in fixed optics, illustrates that atmospheric transparency is good more.
Native system adopts microprocessor, calculates by formula 3 and obtains air transparency parameter.System supports manual synchronizing in addition, and 0 ambient brightness and the 0 air transparency used on the meaning are provided.0 ambient brightness can be by being provided with luminance threshold Lx, and the ambient brightness of every Lx of being lower than all is called 0 ambient brightness; 0 air transparency also can be by being provided with luminance threshold Ly, and the air transparency parameter δ that every corresponding brightness is lower than Ly is called 0 air transparency.
In addition, preferably, should make environment induction system 400 have following quality:
● near the optic response quality of human eye
Have similar to human eye and the induction peak value at the brightness impression curve of 500nm, following table 3 be that the photoinduction curve of this induction system and ordinary silicon optical inductor and human eye contrasts.Like this, can make the visual effect of LED display system meet the human eye characteristic better.
Table 3
● bigger induction range is to adapt to different environmental requirements
Like this, can make the native system can the governing response coefficient, to adapt to different lightness environment.Under dark border, by the governing response coefficient, improve induction precision, with the change of induction low-light level environment.And under than the bright ring border,, improve the induction saturation value by the governing response coefficient, reach the purpose that increases the brightness impression scope.
In different application systems or applied environment, this sensor-based system needs different response accuracy and responding range; Such as in the open air, black night evening is arranged, also have sunnyly, bright weather is arranged, the weather of thick fog is also arranged, so the sensor-based system of field studies needs bigger responding range; And the responding range of indoor application sensor-based system is big with regard to not needing as the responding range of outdoor utility sensor-based system.
Alternatively, environment induction system 400 adopts high integration and modular structure mode to assemble, thereby makes total system small and exquisite, easy to install.
Preferably, in order to adapt to the temperature difference cataclysm of external environment, environment induction system 400 should have good temperature characterisitic, for example guarantees that working range-30 ℃ is to+90 ℃.
Below in conjunction with the computing of accompanying drawing description according to the parameter computing module 304 of an embodiment of the present utility model.
The environmental assessment value that parameter computing module 304 sends with environmental assessment module 302 is carried out computing as basis in conjunction with the parameter that the expert parameter bag is provided.
According to mentioned above, the brightness requirement that LED shows under the varying environment is different.Usually bright more optical environment in order to guarantee the LED display quality, needs to improve the LED display brightness; And dark more optical environment is guaranteeing can to reduce the LED display brightness under the display quality, reduces ambient light contamination, saves the energy.
Preamble has been done detailed introduction at GDZB based on the display quality regulation technology (G-Eye) of environment induction.As can be seen from the above description, the utility model has been realized following technique effect:
This technical scheme can be widely applied to road traffic, square amusement, performs in a radio or TV programme the hall, building show and occasion such as outdoor advertising, it possesses the intelligence adjusting that conforms, so that better display quality to be provided, balance visual effect and environmental requirement better, guaranteeing under the display quality, can reduce environmental optics and pollute the influence of environmental parameter for example and environmental factor the visual effect of LED display system.
Obviously, though this paper is the present invention who describes around the LED display system, but those skilled in the art is easy to the present invention is applied in other display systems, for example plasma display system, liquid crystal display systems, projection display system, OLED display system, investigation of projection display system or CRT display system etc.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. a display quality regulating device is used for regulating the display quality of display system based on the ambient brightness and/or the air transparency in the external world, it is characterized in that, comprising:
The environmental assessment module is connected to the parameter computing module, and it responds to described ambient brightness and/or air transparency to obtain influence value, sends described parameter computing module then to as basis;
Described parameter computing module is connected to the parameter execution module, and it carries out computing with adjusted parameter to described influence value, sends described parameter execution module then to; And
Described parameter execution module is connected to described display system, and it utilizes the brightness and/or the gamma coefficient of the described display system of described adjusting parameter regulation, to obtain to be more suitable for the display quality of human eye.
2. display quality regulating device according to claim 1 is characterized in that, described parameter computing module carries out following at least a kind of computing to described influence value:
When ambient brightness is high more, then make brightness big more, otherwise otherwise;
When ambient brightness is high more, then make the gamma coefficient more little, otherwise otherwise;
When the air transparency is high more, then make brightness more little, otherwise otherwise;
When the air transparency is high more, then make the gamma coefficient big more, otherwise otherwise.
3. display quality regulating device according to claim 2, it is characterized in that, also comprise the expert parameter bag, it is stored on the storer, be connected to described parameter computing module, comprise the set of optical environment parameter and the parameter of display system own, described parameter computing module utilizes described expert parameter bag that described adjusting parameter is further revised.
4. display quality regulating device according to claim 3, it is characterized in that it is one of following that described expert parameter bag comprises at least: the optical property parameter of maximum ambient brightness and minimum ambient brightness, maximum environment transparency and minimum environment transparency, transparency collection and environment temperature Relation Parameters, brightness collection and environment temperature Relation Parameters, system and LED display medium, LED drive current characterisitic parameter.
5. display quality regulating device according to claim 2 is characterized in that, described environmental assessment module comprises:
With reference to lamp, provide reference brightness to photodiode;
Described photodiode is responded to described ambient brightness and the described reference brightness of induction, transmits the influence value of analog form then to A/D converter;
Described A/D converter converts the influence value of described analog form to digital signal, and sends control computing center to;
Described control computing center utilizes described digital signal to calculate described air transparency; And
Switch, it is connected to described with reference to lamp, controls described Kai Heguan with reference to lamp.
6. display quality regulating device according to claim 6 is characterized in that, described control computing center utilizes formula
Calculate described air transparency,
Wherein L represents described reference brightness, and r represents described with reference to the distance between lamp and the described photodiode, and δ is the air extinction coefficient that is used to represent described air transparency.
7. display quality regulating device according to claim 1 is characterized in that, the induction of described environmental assessment module approaches the induction curve of human eye.
8. display quality regulating device according to claim 1 is characterized in that, the induction peak value of described environmental assessment module is in around the 500nm wavelength of light.
9. display quality regulating device according to claim 1 is characterized in that, the working range of described environmental assessment module is-30 ℃ to+90 ℃.
10. according to each described display quality regulating device in the claim 1 to 9, it is characterized in that described display system comprises: LED display system, plasma display system, liquid crystal display systems, projection display system, OLED display system, investigation of projection display system or CRT display system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201238304U CN200941292Y (en) | 2006-07-12 | 2006-07-12 | Quality displaying regulator based on environmental sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201238304U CN200941292Y (en) | 2006-07-12 | 2006-07-12 | Quality displaying regulator based on environmental sensing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200941292Y true CN200941292Y (en) | 2007-08-29 |
Family
ID=38747469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201238304U Expired - Fee Related CN200941292Y (en) | 2006-07-12 | 2006-07-12 | Quality displaying regulator based on environmental sensing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200941292Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923817A (en) * | 2010-09-16 | 2010-12-22 | 深圳市中庆微科技开发有限公司 | Environment monitoring system of LED (Light-Emitting Diode) display screen |
| CN102122499A (en) * | 2011-02-23 | 2011-07-13 | 西南交通大学 | Light environment adaptive regulating system for screen display equipment |
| CN104795022A (en) * | 2015-03-26 | 2015-07-22 | 繁昌县江林广告设计制作有限公司 | Light intensity self-adaptive type LED display screen |
| CN105679278A (en) * | 2016-03-25 | 2016-06-15 | 苏州佳世达电通有限公司 | Adjusting system and method applied to display |
| TWI807868B (en) * | 2022-06-17 | 2023-07-01 | 星彩顯示股份有限公司 | Gamma automatic adjustment system and method with environmental adaptability |
-
2006
- 2006-07-12 CN CNU2006201238304U patent/CN200941292Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923817A (en) * | 2010-09-16 | 2010-12-22 | 深圳市中庆微科技开发有限公司 | Environment monitoring system of LED (Light-Emitting Diode) display screen |
| CN101923817B (en) * | 2010-09-16 | 2014-12-03 | 深圳市中庆微科技开发有限公司 | Environment monitoring system of LED (Light-Emitting Diode) display screen |
| CN102122499A (en) * | 2011-02-23 | 2011-07-13 | 西南交通大学 | Light environment adaptive regulating system for screen display equipment |
| CN104795022A (en) * | 2015-03-26 | 2015-07-22 | 繁昌县江林广告设计制作有限公司 | Light intensity self-adaptive type LED display screen |
| CN104795022B (en) * | 2015-03-26 | 2017-09-29 | 繁昌县倍思生产力促进中心有限公司 | A kind of light intensity self-adaptive type LED display |
| CN105679278A (en) * | 2016-03-25 | 2016-06-15 | 苏州佳世达电通有限公司 | Adjusting system and method applied to display |
| CN105679278B (en) * | 2016-03-25 | 2018-01-30 | 苏州佳世达电通有限公司 | Regulating system and method applied to display |
| TWI807868B (en) * | 2022-06-17 | 2023-07-01 | 星彩顯示股份有限公司 | Gamma automatic adjustment system and method with environmental adaptability |
| US11908371B2 (en) | 2022-06-17 | 2024-02-20 | Starlight Display Corporation | Automatic gamma adjustment system with environmental adaptability |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101105912A (en) | Display quality automatic regulation device and method based on environment induction | |
| CN200941292Y (en) | Quality displaying regulator based on environmental sensing | |
| CN100555406C (en) | To method for regulating outdoor display screen brightness | |
| KR100805684B1 (en) | Led display board presenting brightness and color differently by weather | |
| CN101493202B (en) | Brightness adjustable luminous indicator | |
| TW201315951A (en) | Light-concentrating solar power generation panel, light-concentrating solar power generation device, and light-concentrating solar power generation system | |
| CN106028604A (en) | Intelligent LED illuminating system for classroom | |
| CN104700775A (en) | Image display method and image display brightness regulating device | |
| CN205793529U (en) | A kind of based on LED side light filling and brightness with the display device of ambient light adaptive | |
| CN202363084U (en) | Direct type LED (light emitting diode) backlight assembly and liquid crystal display using same | |
| CN114017689A (en) | Electronic shade, LED lamp bead, light source system and light-emitting device | |
| CN105023517A (en) | Intelligent LED advertisement window with solar tracker | |
| CN203910210U (en) | Municipal energy-saving advertising board | |
| KR101471389B1 (en) | Apparatus of surface light source for signboard | |
| CN201925804U (en) | Direct-illumination type glare-free LED desk lamp | |
| CN101739917B (en) | Positive light advertising board device | |
| Mohammad et al. | Economic and environmental impact of energy efficient design of smart lighting system | |
| CN201638507U (en) | Positive light advertising board device | |
| CN207080853U (en) | A kind of lighting device for illuminating street lamp | |
| Garvey | On-premise commercial sign lighting and light pollution | |
| CN112185282B (en) | Outdoor identification system | |
| CN213545794U (en) | Bidirectional advertisement display screen | |
| Finch | Atmospheric light pollution | |
| CN213277321U (en) | Sound barrier and sound barrier system | |
| Menglong | The discussion of LED outdoor display's light pollution and technical solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20100712 |