CN102543001A - Backlight source brightness regulation method, system and device - Google Patents
Backlight source brightness regulation method, system and device Download PDFInfo
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Abstract
The invention provides a backlight source brightness regulation method. The method comprises acquiring induced electrical signals of each pixel in a photosensitive device according to the ambient brightness; acquiring the average value of the induced electrical signals of each pixel at each moment; acquiring an integral value according to the average values obtained in a set time duration; and regulating power electrical signals of a power supply circuit of the backlight source according to the obtained integral value. The method can regulate electrical signals in the backlight source power supply circuit according to the induced electrical signals generated by detecting the ambient brightness, so that the brightness of the backlight source can change with the ambient brightness. The invention also provides a system and a device corresponding to the method.
Description
Technical field
The present invention relates to liquid crystal display display technique field, relate in particular to a kind of back light source brightness control method, system and device.
Background technology
Be not direct project video signal in the liquid crystal indicator, but luminous through backlight, the windup-degree of liquid crystal material has determined the printing opacity degree, so just forms gray-scale Control.Three coloured light behind the optical filter of three kinds of colors of employing carry out gray-scale Control respectively, can be combined to form thousands of kinds of colors.Existing backlight comprises light emitting diode (LED:Light Emitting Diode) and cold-cathode fluorescence lamp (CCFL:Cold Cathode Fluorescent Lamp).Brightness through regulating backlight can obtain suitable display brightness.But the backlight in the existing display screen can not be regulated according to environment on every side automatically, when light is relatively darker, still adopts to show slinkingly and shows, then can cause harming one's eyes.In bright environment, still adopt high brightness to show, then cause power consumption too big, reduce user experience.And when around the ambient brightness deepening time, when the user possibly too be absorbed in the display screen content displayed again, forget and carry out suitable brightness regulation, so in the course of time, cause user's visual deterioration.
Summary of the invention
The invention provides a kind of back light source brightness control method, can detect,, backlight is adjusted to the brightness corresponding with the ambient brightness that detects according to the brightness of detected surrounding environment to ambient brightness on every side.This method comprises:
Obtain each the pixel electrical signal of reaction that obtains according to ambient brightness in the sensor devices;
Obtain the mean value of each each pixel electrical signal of reaction constantly;
According to setting each mean value that obtains in the duration, obtain integrated value;
According to the integrated value of obtaining power supply electric signal in the feed circuit of backlight is regulated.
The present invention also provides and the corresponding system of method, and this system comprises:
Sensor devices is used for according to ambient brightness, obtains each pixel electrical signal of reaction;
The back light source brightness regulating device is used to obtain the mean value of the electrical signal of reaction value of current time, and said electrical signal of reaction is the electrical signal of reaction of each pixel in the array signal; Obtain integrated value according to setting each mean value that obtains in the duration; Be used for the feed circuit power supply electric signal of backlight being regulated according to the integrated value of obtaining;
Backlight is used under the power supply electric signal effect of feed circuit luminous.
The present invention is corresponding also provides a device, is used for back light source brightness and regulates, and this device comprises:
The mean value acquisition module is used to obtain the mean value of each each pixel electrical signal of reaction constantly;
The integration acquisition module is used for each mean value of obtaining in the duration according to setting, obtains integrated value;
The backlight illumination gain adjusting circuit is used for according to the integrated value of obtaining the feed circuit power supply electric signal of backlight being regulated.
Scheme provided by the invention detects the bright spot of surrounding environment and obtains the array signal that is made up of pixel, and the pixel in the array signal is carried out computing, analysis, regulates according to the power supply electric signal of the adjusting information indication of analyzing.Make the backlight of display screen regulate, with the environment around adapting to along with the variation of ambient brightness on every side.
Description of drawings
Fig. 1 is the embodiments of the invention method flow diagram;
Fig. 2 is the method for the brightness regulation of embodiments of the invention backlight
Fig. 3 is a specific embodiment method flow diagram of the present invention;
Fig. 4 is the another specific embodiment method flow diagram of the present invention;
Fig. 5 is an embodiment of the invention system architecture synoptic diagram;
Fig. 6 is an embodiment of the invention apparatus structure synoptic diagram.
Embodiment
In order to make the backlight in the display screen change brightness along with the change of ambient brightness, when surrounding environment brightness is too bright, reduce brightness of display screen, practice thrift power consumption; When surrounding environment brightness is too dark, be transferred to suitable brightness to back light source brightness, the eyesight with the protection user the invention provides a kind of back light source brightness control method.
Below in conjunction with accompanying drawing, the embodiment of the invention is described.As shown in Figure 1, the method flow of present embodiment is:
Step S101 obtains each the pixel electrical signal of reaction that obtains according to ambient brightness in the sensor devices.
Step S102 obtains the mean value of each each pixel electrical signal of reaction constantly.
Electric signal in the present embodiment can be voltage or electric current.
Have the array that plurality of pixels constitutes in the light sensation device.The brightness according to surrounding environment that all can be real-time in each pixel in the array produces electrical signal of reaction.Electrical signal of reaction to each pixel in a certain moment is asked a mean value, can judge the brightness of the surrounding environment in a certain moment accurately.
When obtaining the mean value of each pixel, the electrical signal of reaction of all pixels in can array is averaged.And, practice thrift cost in order to simplify circuit, and shorten computing time, reduce power consumption, can also in array, the representational pixel of selected part obtain mean value, obtain or choose each pixels in different positions like the pixel interlacing in the array and obtain.
Step S103 according to setting each mean value that obtains in the duration, obtains integrated value.
Obtain integrated value and can be integral mode continuous time, can also be the discrete sampling integral mode.
In the duration of one section setting; The variation that the electrical signal of reaction value of each pixel is not being stopped; And the variation that is not also stopping according to the mean value that the electrical signal of reaction of each pixel obtains; Obtain the integrated value of each mean value in one section setting-up time, that can more prepare obtains the testing result to surrounding environment brightness.
Step S104 regulates power supply electric signal in the feed circuit of backlight according to the integrated value of obtaining.
The integrated value of obtaining among the step S103 is the final analysis result of induced signal that photo-sensitive cell is obtained; Step S104 is according to the result who analyzes; Power supply electric signal in the feed circuit of backlight is regulated accordingly, then made the brightness of backlight make corresponding change along with the brightness of environment.
In the present embodiment, as shown in Figure 2 for the method for the brightness regulation of backlight:
Step S201; Judge that the integrated value obtain is whether in the interval of setting, if then generate adjusting information; Said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated.
The scheme of present embodiment to the adjusting of backlight around ambient brightness cross bright or cross and just the brightness of backlight is adjusted when dark.So the interval that the integrated value of obtaining and is set compares.If the integrated value of obtaining is less than this interval minimum value, or, explain that then the brightness of surrounding environment is too bright or too dark, just need regulate back light source brightness greater than this interval maximal value.When the integrated value of obtaining outside the interval of setting, just can generate adjusting information, and adjusting information comprises described integrated value, integrated value is used for indicating the feed circuit of regulating back backlight corresponding with it value of electrical signals of supplying power.After the brightness of confirming backlight need be regulated, also can adjusting information be presented to the user in the present embodiment, confirm whether need carry out this time regulating by the user.
Step S202 regulates power supply electric signal in the feed circuit of backlight according to adjusting information.
After adjusting information generates, need be according to power supply electric signal desired value in the feed circuit of the indicated backlight of the integrated value that comprises in the adjusting information, to regulating when the power supply value of electrical signals of coming.
When the mode that adopts width modulation in the backlight circuit is supplied power, the control method among the step S202 can for, obtain the desired value of the pulse width modulation duty of the power supply electric signal in the backlight feed circuit of adjusting information indication; The pulse width modulation duty of the power supply electric signal in the backlight feed circuit is adjusted to desired value.
When the mode that adopts the simulation power supply in the backlight circuit is supplied power, control method can also for, obtain the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication; Reference electrical signal in the backlight feed circuit is adjusted to desired value.The reference electrical signal value is a feedback signal of backlight feed circuit, and the change of reference electrical signal value triggers corresponding change of electric signal in the backlight feed circuit.The reference electrical signal value is through the resistance of in the feed circuit of backlight and circuit that backlight is formed, connect, with the value of electrical signals of obtaining on the resistance from then on as the adjusting feedback signal in the circuit of the feed circuit of backlight and backlight composition.When the reference electrical signal value changes, then the value of electrical signals that provides of feed circuit also can change accordingly.
If not only adopted pulse width modulation mode but also adopted the simulation power supply mode in the backlight circuit, then no matter take which kind of method to make amendment to the power supply value of electrical signals in the feed circuit.
When backlight and during flip-flop brightness according to the scheme in the present embodiment; May cause discomfort to the user who is watching; Therefore, when carrying out brightness regulation, can calculate needs desired value poor with when the value that come; Adjusting T.T. obtain the number of times of adjusting according to what set again, adjusted stepwise is to desired value again.More excellent ground obtains the difference of pulse width modulation duty of desired value and the power supply electric signal in the feed circuit of current backlight source of said dutycycle; According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.; According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value.Perhaps, obtain the desired value of said reference electrical signal and the difference of the reference electrical signal value in the feed circuit of current backlight source; According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.; According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.For the user can not felt well in adjusting, the reaction velocity that the control interval time in per step should be longer than human eye is generally 2 milliseconds.And, when adopting the mode of width modulation, causing flicker for fear of human eye identification pulse width signal, the frequency of pulse-width signal will be higher than 100 hertz.
The function that back light source brightness in the present embodiment is regulated can be selected to want to open by the user.More excellent ground when satisfying trigger condition, just can trigger the detection to ambient brightness.When the user needs this function, can adopt to open and open the light or mode such as input command triggers the detection to ambient brightness, to realize self-regulating function.Also can when regulatory function plays a role automatically, close this function.
The scheme that present embodiment provides detects the brightness of surrounding environment by photo-sensitive cell, and the electrical signal of reaction that photo-sensitive cell is obtained calculates, analyzes, with the result of the computational analysis foundation as power supply electric signal in the feed circuit of regulating backlight.Environment flip-flop that can be around in the present embodiment when bright or too dark, the value that promptly detected ambient brightness analysis is drawn not between the setting district in the time, ability is the brightness corresponding with ambient brightness with the brightness regulation of backlight.The control method of present embodiment is through the power supply value of electrical signals in the feed circuit being adjusted to desired value; This desired value is corresponding with the result that ambient brightness is analyzed; When the power supply value of electrical signals in the feed circuit is adjusted to desired value; The brightness of backlight is the brightness after regulating, with environmental facies adaptation on every side.If too bright on every side, then that the brightness regulation of backlight is extremely suitable brightness is with energy-conservation; If too dark on every side, then that the brightness regulation of backlight is extremely suitable brightness is with protection user's eyesight.
Below in conjunction with accompanying drawing, embodiment is described.As shown in Figure 3, the method flow of specific embodiment is:
Step S301 obtains each the pixel electrical signal of reaction that obtains according to ambient brightness in the sensor devices.
Step S302 obtains the mean value of each each pixel electrical signal of reaction constantly.Electric signal can be electric current, perhaps is voltage.The mean value of electrical signal of reaction value is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
Step S303 according to setting each mean value that obtains in the duration, obtains integrated value.
Step S304; Judge that the integrated value obtain is whether in the interval of setting, if then generate adjusting information; Said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated.
Step S305 obtains the desired value of the pulse width modulation duty of the power supply electric signal in the backlight feed circuit of adjusting information indication.
Step S306 is adjusted to desired value with the pulse width modulation duty of the power supply electric signal in the backlight feed circuit.
Electric signal in the present embodiment can be a curtage for electric signal.The mean value of each pixel electrical signal of reaction can be the mean value of the electrical signal of reaction of all pixels, also can be the mean value of the electrical signal of reaction of partial pixel.
In order to improve user experience; Can be and produce discomfort to the flip-flop of back light source brightness, the duty cycle adjustment to the width modulation of the power supply electric signal in the backlight feed circuit in the present embodiment can comprise: the difference of pulse width modulation duty of obtaining desired value and the power supply electric signal in the feed circuit of current backlight source of said dutycycle;
According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value.
User's use for ease also can be provided with trigger condition to the backlight regulatory function of this display screen, when condition satisfies, just begins the brightness of surrounding environment is begun to detect.Whether the user directly satisfying of controlled condition, with the unlatching of control backlight regulatory function or close.
Scheme in the present embodiment is after detecting surrounding environment brightness, to obtain the array signal that is made up of pixel, and the pixel electrical signal of reaction in the array signal is analyzed.The electrical signal of reaction here can be electric current, also can be voltage, and can be whole pixels to choosing of pixel, perhaps in order to simplify calculating, to practice thrift power consumption and the selected part pixel.Obtain integrated value when the electrical signal of reaction value of pixel being made analyze, the interval of integrated value and setting is compared, if integrated value not in the interval of setting, explains then that environment on every side is too bright or too dark, need regulate the backlight of screen.After generation comprises the adjusting information of integrated value, with the power supply value of information in the feed circuit of backlight be adjusted to adjusting information in the corresponding desired value of integrated value, promptly accomplished brightness regulation to backlight.
Below in conjunction with Fig. 4 another specific embodiment is described.
Step S401 obtains each the pixel electrical signal of reaction that obtains according to ambient brightness in the sensor devices.
Step S402 obtains the mean value of each each pixel electrical signal of reaction constantly.Electric signal can be electric current, perhaps is voltage.The mean value of electrical signal of reaction value is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
Step S403 according to setting each mean value that obtains in the duration, obtains integrated value.
Step S404; Judge that the integrated value obtain is whether in the interval of setting, if then generate adjusting information; Said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated.
Step S405 obtains the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication; The change of reference electrical signal value makes the electric signal correspondence in the backlight feed circuit change.
Step S406 is adjusted to desired value with the reference electrical signal in the backlight feed circuit.
In order to improve user experience; Can be and produce discomfort to the flip-flop of back light source brightness, the duty cycle adjustment to the width modulation of the power supply electric signal in the backlight feed circuit in the present embodiment can comprise: obtain the desired value of said reference electrical signal and the difference of the reference electrical signal value in the feed circuit of current backlight source;
According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.
Electric signal in the present embodiment can be a curtage for electric signal.The mean value of each pixel electrical signal of reaction can be the mean value of the electrical signal of reaction of all pixels, also can be the mean value of the electrical signal of reaction of partial pixel.
User's use for ease also can be provided with trigger condition to the backlight regulatory function of this display screen, when condition satisfies, just begins the brightness of surrounding environment is begun to detect.Whether the user directly satisfying of controlled condition, with the unlatching of control backlight regulatory function or close.
Scheme in the present embodiment is after detecting surrounding environment brightness, to obtain the array signal that is made up of pixel, and the pixel electrical signal of reaction in the array signal is analyzed.The electrical signal of reaction here can be electric current, also can be voltage, and can be whole pixels to choosing of pixel, perhaps in order to simplify calculating, to practice thrift power consumption and the selected part pixel.Obtain integrated value when the electrical signal of reaction value of pixel being made analyze, the interval of integrated value and setting is compared, if integrated value not in the interval of setting, explains then that environment on every side is too bright or too dark, need regulate the backlight of screen.After generation comprises the adjusting information of integrated value, with the power supply value of information in the feed circuit of backlight be adjusted to adjusting information in the corresponding desired value of integrated value, promptly accomplished brightness regulation to backlight.
The present invention also provides the system that adapts with method, and is as shown in Figure 5, and this system comprises: sensor devices 51, back light source brightness regulating device 52 and backlight 53.
Back light source brightness regulating device 52 is used to obtain the mean value of the electrical signal of reaction value of current time, and said electrical signal of reaction is the electrical signal of reaction of each pixel in the array signal; Obtain integrated value according to setting each mean value that obtains in the duration; Be used for the feed circuit power supply electric signal of backlight being regulated according to the integrated value of obtaining;
Back light source brightness regulating device 52 is used for; Judge that the integrated value obtain is whether in the interval of setting; If; Then generate adjusting information, said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated; According to adjusting information power supply electric signal in the feed circuit of backlight is regulated.
In the system of present embodiment, electric signal is a curtage; The mean value of electrical signal of reaction value is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
Light-source brightness regulating device 52 is used for, and obtains the desired value of the pulse width modulation duty of the power supply electric signal in the backlight feed circuit of adjusting information indication;
The pulse width modulation duty of the power supply electric signal in the backlight feed circuit is adjusted to desired value;
Perhaps, obtain the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication;
Reference electrical signal in the backlight feed circuit is adjusted to desired value.
The back light source brightness regulating device is used for obtaining the difference of pulse width modulation duty of power supply electric signal of desired value and the current backlight source feed circuit of said dutycycle;
According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value;
Perhaps be used for, obtain the desired value of said reference electrical signal and the difference of the reference electrical signal value in the feed circuit of current backlight source;
According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.
This system also comprises trigger module 54.Trigger module 54 was used for before testing environment brightness, according to the condition of setting, detection trigger ambient brightness.
As shown in Figure 6, be back light source brightness regulating device provided by the invention, this device comprises: mean value acquisition module 61, integration acquisition module 62 and backlight illumination gain adjusting circuit 63.
Mean value acquisition module 61 is used to obtain the mean value of the electrical signal of reaction value of current time, and said electrical signal of reaction is the electrical signal of reaction of each pixel in the array signal; Integration acquisition module 62 is used for obtaining integrated value according to setting each mean value that obtains in the duration; Backlight illumination gain adjusting circuit 63 is used for according to the integrated value of obtaining the feed circuit power supply electric signal of backlight being regulated.
Electric signal in the present embodiment is a curtage.The mean value of electrical signal of reaction value is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
Backlight illumination gain adjusting circuit 63; Can be used for judging that the integrated value obtained is whether in the interval of setting; If; Then generate adjusting information, said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated; According to adjusting information power supply electric signal in the feed circuit of backlight is regulated.
Backlight illumination gain adjusting circuit 63 is used for obtaining the desired value of pulse width modulation duty of power supply electric signal of the backlight feed circuit of adjusting information indication;
The pulse width modulation duty of the power supply electric signal in the backlight feed circuit is adjusted to desired value;
Perhaps, obtain the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication;
Reference electrical signal in the backlight feed circuit is adjusted to desired value.
Backlight illumination gain adjusting circuit 63 can also be used for obtaining the difference of pulse width modulation duty of power supply electric signal of desired value and the current backlight source feed circuit of said dutycycle; According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.; According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value; Perhaps, be used for obtaining the difference of reference electrical signal value of desired value and the current backlight source feed circuit of said reference electrical signal; According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.; According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.
This device also comprises trigger module 64.Trigger module 64 was used for before testing environment brightness, according to the condition of setting, detection trigger ambient brightness.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (21)
1. a back light source brightness control method is characterized in that, this method comprises:
Obtain each the pixel electrical signal of reaction that obtains according to ambient brightness in the sensor devices;
Obtain the mean value of each each pixel electrical signal of reaction constantly;
According to setting each mean value that obtains in the duration, obtain integrated value;
According to the integrated value of obtaining power supply electric signal in the feed circuit of backlight is regulated.
2. method according to claim 1 is characterized in that, the integrated value that said basis is obtained is regulated power supply electric signal in the feed circuit of backlight and comprised:
Judge the integrated value obtain whether in the interval of setting, if, then generating adjusting information, said adjusting information comprises the said integrated value of obtaining, said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated;
According to adjusting information power supply electric signal in the feed circuit of backlight is regulated.
3. method according to claim 2 is characterized in that, said electric signal is a curtage.
4. method according to claim 1 is characterized in that, the mean value of said each pixel electrical signal of reaction is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
5. method according to claim 2 is characterized in that, the said power supply electric signal of backlight the adjusting according to adjusting information comprises:
Obtain the desired value of the pulse width modulation duty of the power supply electric signal in the backlight feed circuit of adjusting information indication;
The pulse width modulation duty of the power supply electric signal in the backlight feed circuit is adjusted to desired value;
Perhaps, obtain the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication;
Reference electrical signal in the backlight feed circuit is adjusted to desired value.
6. method according to claim 5 is characterized in that, said pulse width modulation duty with the power supply electric signal in the backlight feed circuit is adjusted to desired value and comprises:
Obtain the difference of pulse width modulation duty of desired value and the power supply electric signal in the feed circuit of current backlight source of said dutycycle;
According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value;
Saidly reference electrical signal in the backlight feed circuit be adjusted to desired value comprise:
Obtain the desired value of said reference electrical signal and the difference of the reference electrical signal value in the feed circuit of current backlight source;
According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.
7. method according to claim 1 is characterized in that, before testing environment brightness, this method further comprises:
According to the condition of setting, detection trigger ambient brightness.
8. a back light source brightness regulating system is characterized in that, this system comprises:
Sensor devices is used for according to ambient brightness, obtains each pixel electrical signal of reaction;
The back light source brightness regulating device is used to obtain the mean value of each each pixel electrical signal of reaction constantly; Be used for each mean value of obtaining in the duration according to setting, obtain integrated value; According to the integrated value of obtaining power supply electric signal in the feed circuit of backlight is regulated;
Backlight is used under the power supply electric signal effect of feed circuit luminous.
9. system according to claim 8; It is characterized in that said back light source brightness regulating device is used for, judge that the integrated value obtain is whether in the interval of setting; If; Then generate adjusting information, said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated; According to adjusting information power supply electric signal in the feed circuit of backlight is regulated.
10. system according to claim 9 is characterized in that, said electric signal is a curtage.
11. system according to claim 8 is characterized in that, the mean value of said electrical signal of reaction value is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
12. system according to claim 9 is characterized in that, said back light source brightness regulating device is used for, and obtains the desired value of the pulse width modulation duty of the power supply electric signal in the backlight feed circuit of adjusting information indication;
The pulse width modulation duty of the power supply electric signal in the backlight feed circuit is adjusted to desired value;
Perhaps, obtain the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication;
Reference electrical signal in the backlight feed circuit is adjusted to desired value.
13. system according to claim 12 is characterized in that, said back light source brightness regulating device is used for obtaining the difference of pulse width modulation duty of power supply electric signal of desired value and the current backlight source feed circuit of said dutycycle;
According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value;
Perhaps be used for, obtain the desired value of said reference electrical signal and the difference of the reference electrical signal value in the feed circuit of current backlight source;
According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.
14. system according to claim 8 is characterized in that, this system also comprises trigger module, is used for before testing environment brightness, according to the condition of setting, detection trigger ambient brightness.
15. a back light source brightness regulating device is characterized in that, this device comprises:
The mean value acquisition module is used to obtain the mean value of each each pixel electrical signal of reaction constantly;
The integration acquisition module is used for each mean value of obtaining in the duration according to setting, obtains integrated value;
The backlight illumination gain adjusting circuit is used for according to the integrated value of obtaining the feed circuit power supply electric signal of backlight being regulated.
16. device according to claim 15 is characterized in that, said electric signal is a curtage.
17. device according to claim 15 is characterized in that, the mean value of said each pixel electrical signal of reaction is the mean value of the electrical signal of reaction of all pixels, or the mean value of the electrical signal of reaction of partial pixel.
18. device according to claim 15; It is characterized in that said backlight illumination gain adjusting circuit is used for, judge that the integrated value obtain is whether in the interval of setting; If; Then generate adjusting information, said adjusting information comprises the said integrated value of obtaining, and said integrated value is used for indicating the desired value after the feed circuit power supply electric signal of backlight regulated; According to adjusting information power supply electric signal in the feed circuit of backlight is regulated.
19. device according to claim 18 is characterized in that, said backlight illumination gain adjusting circuit is used for, and obtains the desired value of the pulse width modulation duty of the power supply electric signal in the backlight feed circuit of adjusting information indication;
The pulse width modulation duty of the power supply electric signal in the backlight feed circuit is adjusted to desired value;
Perhaps, obtain the desired value of the reference electrical signal value in the backlight feed circuit of adjusting information indication;
Reference electrical signal in the backlight feed circuit is adjusted to desired value.
20. device according to claim 19 is characterized in that, said backlight illumination gain adjusting circuit is used for obtaining the difference of pulse width modulation duty of power supply electric signal of desired value and the current backlight source feed circuit of said dutycycle;
According to the number of times of setting that the pulse width modulation duty of the power supply electric signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the pulse width modulation duty adjusted stepwise of the power supply electric signal in the backlight feed circuit to desired value;
Perhaps be used for, obtain the desired value of said reference electrical signal and the difference of the reference electrical signal value in the feed circuit of current backlight source;
According to the number of times of setting that the reference electrical signal in the backlight feed circuit is regulated that obtains adjusting T.T.;
According to said difference and number of times, with the reference electrical signal adjusted stepwise in the backlight feed circuit to desired value.
21. device according to claim 15 is characterized in that, this device also comprises:
Trigger module was used for before testing environment brightness, according to the condition of setting, detection trigger ambient brightness.
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| CN2011104225138A CN102543001A (en) | 2011-12-15 | 2011-12-15 | Backlight source brightness regulation method, system and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104225138A CN102543001A (en) | 2011-12-15 | 2011-12-15 | Backlight source brightness regulation method, system and device |
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| CN2011104225138A Pending CN102543001A (en) | 2011-12-15 | 2011-12-15 | Backlight source brightness regulation method, system and device |
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| CN108665869A (en) * | 2017-04-01 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance and its brightness of display screen adjusting method and regulating device |
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Application publication date: 20120704 |