CN101872597A - Intelligent luminance control induction method - Google Patents
Intelligent luminance control induction method Download PDFInfo
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- CN101872597A CN101872597A CN 201010232863 CN201010232863A CN101872597A CN 101872597 A CN101872597 A CN 101872597A CN 201010232863 CN201010232863 CN 201010232863 CN 201010232863 A CN201010232863 A CN 201010232863A CN 101872597 A CN101872597 A CN 101872597A
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- luminance control
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Abstract
The invention relates to an intelligent luminance control induction method, which is characterized by comprising the following steps of: first acquiring the luminance of an ambient environment by a luminance sensor; then performing a sampling automatic correction algorithm for a plurality of times to reduce the interference of the luminance variations of the ambient environment to obtain stable luminance; next reducing the luminance variations by an analogue hysteresis comparison algorithm, and setting stable pulse width modulation signals for controlling the backlight of a liquid crystal panel; and finally adjusting the backlight of the liquid crystal panel by the pulse width modulation signals to obtain most comfortable picture luminance adapted to the environment. The method has the advantages of solving the problem of the picture flickering of a display caused by the influence of the luminance variations of the environment, enabling users to appreciate programs under the most comfortable luminance at any time and simultaneously reducing the fatigue strength of eyes.
Description
Technical field
The invention belongs to the liquid crystal tv technology field, especially relate to a kind of method that is used for intelligent luminance control induction.
Background technology
Along with advancing by leaps and bounds of digital technology, and the liquid crystal TV set function is more and more complete, and human-computer interaction interface is more and more friendly, can design gorgeous OSD menu interface, carries out personalized setting such as channel, color, brightness, contrast, volume.LCD TV is pursued the development of high brightness high-contrast, shows although this helps color, if too bright or too dark, all makes eyes more tired easily.In existing LCD TV, the size of brightness can lighten by the button on OSD menu or the keypad or dim.Can also carry out the brightness adjustment automatically according to the bright dark variation of current surrounding environment in high-end LCD TV, make the user under the most comfortable brightness, to appreciate program, avoid eye strain.When sunlight is strong by day or display screen reflective phenomenon is arranged, this moment, the brightness of LCD backlight plate was not enough, LCD TV is heightened brightness automatically, makes the user can clearly appreciate program and operation; When dusk or light source were darker, LCD TV was turned down brightness automatically, has reduced the brightness of LCD backlight plate so, the user does not just have and holds dazzling sensation, the eyes indefatigability is not easy to cause the eyesight strain, symptoms such as eye-blurred or visual deterioration occur.Since brightness automatically the quality of control to be subjected to the influence of surrounding environment change very big, sunray no change arranged, the switch of environment light, environment object comprise moving of people, and the variation that produces brightness is all arranged, and then the brightness that has influence on LCD TV is controlled automatically.The brightness auto-controlling method of existing LCD TV is undesirable, and when surrounding environment brightness brightens suddenly, LCD TV promptly starts automatically and lightens brightness; When the unexpected deepening of surrounding environment brightness, promptly automatic startup of LCD TV dims brightness.Because surrounding environment brightness is very short by the transformation period that secretly brightens by bright deepening, LCD TV is also and then adjusted automatically by secretly brightening, by bright deepening, that is seen on LCD screen like this neglects the bright dark variation of neglecting, and influences the user greatly and appreciates program, strengthens the eye fatigue degree simultaneously.So can control automatically, can not cause again that picture is neglected brightly to neglect secretly that allow the user can both appreciate program under the most comfortable brightness at any time, becoming influences the important bottleneck of the further lifting of LCD TV in order to solve brightness.
Summary of the invention
The method that the purpose of this invention is to provide a kind of intelligent luminance control induction, it can give full play to the display brightness advantages and benefits of control automatically, allows the user can both appreciate program at any time under the most comfortable brightness, reduces the eye fatigue degree simultaneously.
To achieve these goals, the present invention adopts following technology: a kind of method of intelligent luminance control induction, it is characterized in that, and comprise the following steps: at first to pass through the brightness impression device, collect the brightness of surrounding environment; Next automatic correcting algorithm of repeatedly sampling to reduce the interference that external environment brightness changes, obtains stable brightness; Then, reduce brightness and neglect the bright dark variation of neglecting, set the pulse-width signal of stable control liquid crystal panel backlight by the sluggish comparison algorithm of simulation; By pulse-width signal liquid crystal panel backlight adjustment is obtained the most comfortable picture brightness of adaptive environment again.
Compared with prior art, advantage of the present invention and good effect are: it is independent that the method for intelligent luminance control induction of the present invention provides a kind of module, algorithm optimization, the reliable method of system; The method keeps LCD TV to control automatically according to the brightness of surrounding environment, allows the user can both appreciate program under the most comfortable brightness at any time.Remedied traditional LCD TV, when brightness was controlled automatically, because the influence that changed suddenly by ambient brightness, the picture that is brought was neglected bright limitation of neglecting dark problem.Simultaneously, this method has promoted competitiveness of product, increases product profit.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Fig. 2 is the automatic correction work process flow diagram of intelligent luminance control induction of the present invention.
Fig. 3 is the curve map of the sluggish comparison algorithm of simulation of intelligent luminance control induction of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the specific functional modules figure of the method for a kind of intelligent luminance control induction of the present invention.Brightness data collection 101 is by the brightness of optical inductor induction surrounding environment, and luminance signal is converted to analog electrical signal, changes digital signal into by analog to digital converter again, and this digital signal is delivered to the central processing unit of LCD TV again and handled.The central processing unit that automatic correcting algorithm 102 is LCD TV is analyzed surrounding environment brightness by calculation correction and is changed, and judges the stable analog-to-digital numerical value of output when ambient brightness is stablized.It is different with a threshold voltage of common automatic inductive light intensity control simulating sluggish comparison algorithm 103, has set two threshold voltages, is called forward threshold voltage and negative sense threshold voltage.Rise to the input voltage that the process of high level (bright) the pwm circuit state is changed at the ambient brightness input signal from low level (secretly) and be called forward threshold voltage, drop to the input voltage that the low level process of (secretly) the pwm circuit state is changed at input signal from high level (bright) and be called the negative sense threshold voltage.The change of the output PWM that is designed to like this stop the ambient brightness input signal subtle change (being lower than a certain threshold value) to occur and causes avoids brightness to neglect the bright dark variation of neglecting.Control backlight illumination 104 is that the stable PWM voltage signal of central processing unit output is given the backlight of liquid crystal panel.
Fig. 2 is the automatic correction work process flow diagram of intelligent luminance control induction of the present invention.Setting and gathering the brightness data time interval 201 is the time that optical inductor brightness is gathered in initialization at every turn.It is to reach the time that can go to gather optical inductor brightness that time is timed to 202.Gathering brightness data 203 is that central processing unit reads the numerical value of optical inductor brightness data by analog-to-digital digital signal.Arriving sampling number 204 is to arrive to gather all the same number of times of brightness data, and the expression ambient brightness is stable, no longer changes.Exporting stable brightness 205 is that the stable PWM of central processing unit output goes to control the backlight of liquid crystal panel.The step of automatic correcting algorithm: at first set and gather the brightness data time interval and set sampling number; When the time interval is timed to, read the data of optical inductor brightness; After sampling number arrives preset times, export stable brightness; Go to control the backlight of liquid crystal panel by the stable PWM of central processing unit output again.
Fig. 3 is the curve map of the sluggish comparison algorithm of simulation of intelligent luminance control induction of the present invention.The backlight control of PWM is divided into five sections, four sluggish comparison algorithm controls of simulation.Each simulation hysteresis comparator has two threshold value A DC values, is called positive threshold ADC and negative sense threshold value A DC.Rise to the input ADC that the process of high level (bright) the pwm circuit state is changed from low level (secretly) at the ambient brightness input signal and be called positive threshold ADC, drop to the input ADC that the low level process of (secretly) the pwm circuit state is changed at input signal from high level (bright) and be called negative sense threshold value A DC.For example ADC2 is positive threshold ADC, and ADC1 is negative sense threshold value A DC, rises to the process of ADC2 high level (bright) from ADC1 low level (secretly) at the ambient brightness input signal, makes the PWM state change PWM4 into by PWN5; Drop to the ADC1 low level process of (secretly) from ADC2 high level (bright) at the ambient brightness input signal, make the PWM state change PWM5 into by PWN4.Stable liquid crystal panel backlight control is guaranteed in the change of the output PWM that is designed to like this stop the ambient brightness input signal subtle change (being lower than a certain threshold value A DC) to occur and causes.
In sum, the method for this intelligent luminance control induction is divided into brightness data collection, automatic correcting algorithm, simulates sluggish comparison algorithm, controls the backlight illumination module.By the automatic correcting algorithm of repeatedly sampling, obtain stable brightness control signal.Simulate sluggish comparison algorithm by software, stop ambient brightness subtle change to occur, and cause that picture brightness neglects the bright dark variation of neglecting, make the user under the most comfortable picture of LCD TV adaptive environment, appreciate program.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. the method for an intelligent luminance control induction is characterized in that, comprises the following steps: at first to pass through the brightness impression device, collects the brightness of surrounding environment; Next automatic correcting algorithm of repeatedly sampling to reduce the interference that external environment brightness changes, obtains stable brightness; Then, reduce brightness and neglect the bright dark variation of neglecting, set the pulse-width signal of stable control liquid crystal panel backlight by the sluggish comparison algorithm of simulation; By pulse-width signal liquid crystal panel backlight adjustment is obtained the most comfortable picture brightness of adaptive environment again.
2. the method for intelligent luminance control induction according to claim 1 is characterized in that: described automatic correcting algorithm is to set the regular hour sheet to gather brightness data, and sets the number of times of gathering brightness data, guarantees stably to gather brightness.
3. according to the method for claims 1 described a kind of intelligent luminance control induction, it is characterized in that: the sluggish comparison algorithm of described simulation adopts the backlight control with PWM to be divided into five sections, four sluggish comparison algorithm controls of simulation, each simulation hysteresis comparator has two threshold value A DC values respectively, is called positive threshold ADC and negative sense threshold value A DC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010232863 CN101872597A (en) | 2010-07-21 | 2010-07-21 | Intelligent luminance control induction method |
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| CN 201010232863 CN101872597A (en) | 2010-07-21 | 2010-07-21 | Intelligent luminance control induction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098369A (en) * | 2011-03-07 | 2011-06-15 | 重庆国虹科技发展有限公司 | Control method for backlight brightness of mobile phone LCD (liquid crystal display) |
| CN102800301A (en) * | 2011-05-27 | 2012-11-28 | 联咏科技股份有限公司 | Display device and image compensation method thereof |
| CN105139827A (en) * | 2015-08-07 | 2015-12-09 | 惠州西玛电子有限公司 | Automatic backlight adjustment method for vehicle-mounted entertainment system |
| CN105845087A (en) * | 2014-12-31 | 2016-08-10 | 广州奥翼电子科技有限公司 | Control method for driving electronic paper, controller, device, and electronic paper display device |
| WO2018120861A1 (en) * | 2016-12-28 | 2018-07-05 | 青岛海信电器股份有限公司 | Method and device for obtaining and processing backlight brightness data, and liquid crystal display device |
| CN114283752A (en) * | 2021-12-30 | 2022-04-05 | 吉林省钜鸿智能技术有限公司 | Light intensity self-adjusting liquid crystal display screen |
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| CN201063938Y (en) * | 2007-07-09 | 2008-05-21 | 青岛海信电器股份有限公司 | Brightness control circuit and display device provided with the circuit |
| CN101751866A (en) * | 2008-12-16 | 2010-06-23 | 恩益禧电子股份有限公司 | Backlight brightness control for panel display device |
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| US6118415A (en) * | 1998-04-10 | 2000-09-12 | Eldec Corporation | Resonant square wave fluorescent tube driver |
| CN101180786A (en) * | 2005-11-22 | 2008-05-14 | 罗姆股份有限公司 | Inverter, its control circuit, and light emitting device and liquid crystal television using the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098369A (en) * | 2011-03-07 | 2011-06-15 | 重庆国虹科技发展有限公司 | Control method for backlight brightness of mobile phone LCD (liquid crystal display) |
| CN102098369B (en) * | 2011-03-07 | 2013-12-04 | 重庆国虹科技发展有限公司 | Control method for backlight brightness of mobile phone LCD (liquid crystal display) |
| CN102800301A (en) * | 2011-05-27 | 2012-11-28 | 联咏科技股份有限公司 | Display device and image compensation method thereof |
| CN105845087A (en) * | 2014-12-31 | 2016-08-10 | 广州奥翼电子科技有限公司 | Control method for driving electronic paper, controller, device, and electronic paper display device |
| CN105845087B (en) * | 2014-12-31 | 2018-08-24 | 广州奥翼电子科技股份有限公司 | Drive control method, controller, device and the display device of electronic paper of Electronic Paper |
| CN105139827A (en) * | 2015-08-07 | 2015-12-09 | 惠州西玛电子有限公司 | Automatic backlight adjustment method for vehicle-mounted entertainment system |
| WO2018120861A1 (en) * | 2016-12-28 | 2018-07-05 | 青岛海信电器股份有限公司 | Method and device for obtaining and processing backlight brightness data, and liquid crystal display device |
| CN114283752A (en) * | 2021-12-30 | 2022-04-05 | 吉林省钜鸿智能技术有限公司 | Light intensity self-adjusting liquid crystal display screen |
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Application publication date: 20101027 |