CN104008732A - Method and system for adjusting brightness of LED backlight of liquid crystal display - Google Patents
Method and system for adjusting brightness of LED backlight of liquid crystal display Download PDFInfo
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- CN104008732A CN104008732A CN201410202702.8A CN201410202702A CN104008732A CN 104008732 A CN104008732 A CN 104008732A CN 201410202702 A CN201410202702 A CN 201410202702A CN 104008732 A CN104008732 A CN 104008732A
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Abstract
The invention belongs to the field of liquid crystal display brightness control and provides a method and system for adjusting brightness of LED backlight of a liquid crystal display. According to the method, at first, facial feature image information of users in front of the liquid crystal display is detected; the detected facial feature image information and preset facial feature image information are compared to obtain similarity; the obtained similarity and a preset similarity threshold value are compared, whether the users in front of the liquid crystal display are preset users is judged according to the compared result, and the LED backlight is controlled to carry out corresponding balance adjustment according to the different users. When the users use the liquid crystal display for a long time, the relative balanced level of the amount of light entering the eyes is always kept, and therefore the problem that due to the fact that the users watch the liquid crystal display for a long time, vision is impaired can be avoided.
Description
Technical field
The invention belongs to LCD brightness control field, relate in particular to a kind of LED backlight source for liquid crystal display brightness adjusting method and system.
background technology
Backlight is to be positioned at liquid crystal display a kind of light source behind, and its illumination effect will directly have influence on LCD MODULE visual effect.At present, LCD TV and graphoscope are all generally to use LED-backlit source.
During work, people can use computing machine for a long time, in computed process, user need to watch the screen of liquid crystal display for a long time, when reaching a specified time, eyes can fatigue need to have a rest, and user understands half blink or ceaselessly blinks with fatigue-relieving, now, the light-inletting quantity that liquid crystal display enters eyes can reduce, and user sees that the content on display can thicken, and user will have a mind to or the display of moving close to unintentionally, for a long time so, can make user's visual impairment; Equally, child was in and saw TV vacation, was also a whole day conventionally, saw that for a long time TV can have a strong impact on child's vision health.
summary of the invention
The invention provides a kind of method of LED backlight source for liquid crystal display brightness regulation, be intended to solve the source brightness of available liquid crystal display backlight and can not carry out corresponding balance adjustment according to different users, make the problem of user's visual impairment in long-term use procedure.
In order to address the above problem, the present invention is achieved in that a kind of method of LED backlight source for liquid crystal display brightness regulation, said method comprising the steps of:
User's facial characteristics image information before detection LCD monitor;
The facial characteristics image information detecting and default facial characteristics image information are contrasted to obtain similarity;
The similarity of obtaining and default similarity threshold are carried out to size relatively, according to comparative result, judge before described liquid crystal display whether user is default user;
According to the steering order corresponding with default user, to control LED-backlit source and carry out luminance balance adjusting;
No, point out user whether to be set to default user;
Be, according to the described user of foresee steps, be set to default user, generate the steering order corresponding with described user and carry out;
No, according to preset instructions, control LED-backlit source and carry out luminance balance adjusting.
Further, described facial characteristics image information comprises shape of face, face is wide, eyes are big or small, nose is big or small and relative position separately.
Further, described the similarity of obtaining and default similarity threshold are carried out to size relatively, according to comparative result, judge that whether user before described liquid crystal display is that default user's step is specially:
When the described similarity of obtaining is more than or equal to described default similarity threshold, judge that the front user of described liquid crystal display is for default user;
When the described similarity of obtaining is less than described default similarity threshold, judge the front non-default user of user of described liquid crystal display.
Further, the described step that is set to default user according to the described user of foresee steps is specially:
According to the described facial characteristics image information detecting, it is the described user numbering of filing;
Point out described user to input UCVA or correct defects of vision and need watch continuously the liquid crystal display time;
The parameter values of user's input is kept in the storage space corresponding with its facial characteristics image information.
Further, the step of the described generation steering order corresponding with described user is specially:
According to following formula, calculate LED-backlit source brightness amount of amplification △ Y per hour:
；
The liquid crystal display initial balance brightness of take is starting point, and the control program that generating control LED-backlit source brightness increases with amount of amplification △ Y per hour is stored in described storage space;
Wherein, Y represents the brightness of liquid crystal display initial balance; D is user's UCVA or corrects defects of vision; T watches the liquid crystal display time continuously for user.
The present invention also provides a kind of LED backlight source for liquid crystal display brightness control system, and described system comprises:
Detecting unit, for detection of the facial characteristics image information of user before liquid crystal display;
Comparing unit, for contrasting to obtain similarity by the facial characteristics image information detecting and default facial characteristics image information;
Judging unit, for the similarity of obtaining and default similarity threshold being carried out to size relatively, judges before described liquid crystal display according to comparative result whether user is default user;
The first control module, carries out luminance balance adjusting for controlling LED-backlit source according to the steering order corresponding with default user;
Tip element, for pointing out user whether to be set to default user;
Setting unit, for being set to default user according to the described user of foresee steps;
Generation unit, for generating the steering order corresponding with described user;
Performance element, the steering order generating for carrying out described generation unit;
The second control module, carries out luminance balance adjusting for controlling LED-backlit source according to preset instructions.
Further, described facial characteristics image information comprises shape of face, face is wide, eyes are big or small, nose is big or small and relative position separately.
Further, described judging unit specifically for:
When the described similarity of obtaining is more than or equal to described default similarity threshold, judge that the front user of described liquid crystal display is for default user;
When the described similarity of obtaining is less than described default similarity threshold, judge the front non-default user of user of described liquid crystal display.
Further, described setting unit specifically for:
According to the described facial characteristics image information detecting, it is the described user numbering of filing;
Point out described user to input UCVA or correct defects of vision and need watch continuously the liquid crystal display time;
The parameter values of user's input is kept in the storage space corresponding with its facial characteristics image information.
Further, described generation unit specifically for:
According to following formula, calculate LED-backlit source brightness amount of amplification △ Y per hour:
；
The liquid crystal display initial balance brightness of take is starting point, and the control program that generating control LED-backlit source brightness increases with amount of amplification △ Y per hour is stored in described storage space;
Wherein, Y represents the brightness of liquid crystal display initial balance; D is user's UCVA or corrects defects of vision; T watches the liquid crystal display time continuously for user.
In the present invention, by the user to before liquid crystal display, detect, judge that whether it is default user, controls the brightness in LED-backlit source and carries out corresponding balance adjustment for different users.Beneficial effect of the present invention is that according to different users, controlling LED-backlit source carries out different balance adjustment, make user in the process of long-term use liquid crystal display, the light-inletting quantity of eyes maintains the level of relative equilibrium all the time, avoids user owing to watching for a long time liquid crystal display to cause the problem of visual impairment.
accompanying drawing explanation
Fig. 1 is the first realization flow figure of the LED backlight source for liquid crystal display brightness adjusting method that provides of the embodiment of the present invention;
Fig. 2 is the second realization flow figure of the LED backlight source for liquid crystal display brightness adjusting method that provides of the embodiment of the present invention;
Fig. 3 is the 3rd realization flow figure of the LED backlight source for liquid crystal display brightness adjusting method that provides of the embodiment of the present invention;
Fig. 4 is the 4th realization flow figure of the LED backlight source for liquid crystal display brightness adjusting method that provides of the embodiment of the present invention;
Fig. 5 is the frame construction drawing of the LED backlight source for liquid crystal display brightness control system that provides of the embodiment of the present invention.
embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the flow process of the LED backlight source for liquid crystal display brightness adjusting method that the embodiment of the present invention provides, and for convenience of explanation, only lists the part relevant to the embodiment of the present invention, and details are as follows:
As shown in Figure 1, the method for LED backlight source for liquid crystal display brightness regulation provided by the invention, comprises the following steps:
User's facial characteristics image information before step S100, detection LCD monitor.
In embodiments of the present invention, the user's who detects facial characteristics image information includes but not limited to shape of face, face is wide, eyes are big or small, nose is big or small and relative position separately, in embodiments of the present invention, what mainly detect is the facial characteristics image information apart from the nearest user of liquid crystal display, detecting unit for detection of user's facial characteristics image information first detects the user nearest with liquid crystal display desired location (as liquid crystal display upper side frame middle), then detects this nearest user's facial characteristics image information.
Step S200, the facial characteristics image information detecting and default facial characteristics image information are contrasted to obtain similarity.
In embodiments of the present invention, by the user's who detects facial characteristics information is contrasted and mated with default user's facial characteristics information, obtain the similarity of this user's facial characteristics image information and the facial image information of default use.
Step S300, the similarity of obtaining and default similarity threshold are carried out to size relatively, according to comparative result, judge before this liquid crystal display whether user is default user;
To perform step S400; Otherwise execution step S500.
In embodiments of the present invention, default similarity threshold is 70%.Further, as shown in Figure 2, in step S300, according to comparative result, judge that whether user before this liquid crystal display is that default user's step specifically comprises the following steps:
Step S301, when this similarity of obtaining is more than or equal to this default similarity threshold, judge that user is default user before this liquid crystal display;
Step S302, when this similarity of obtaining is less than this default similarity threshold, judge the non-default user of user before this liquid crystal display.
Step S400, the basis steering order corresponding with default user are controlled LED-backlit source and are carried out luminance balance adjusting.
In embodiments of the present invention, when the user of this detection is default user, before showing, this user's facial characteristics image is stored, and generated the steering order corresponding with this user, the concrete grammar of the generation of this steering order is as step S601-S605.
Whether step S500, prompting user are set to default user;
To perform step S600; No, perform step S700.
In embodiments of the present invention, when detecting this user's facial characteristics image information when less with existing default facial characteristics image information similarity, this user of surface is not default user, now with regard to reminding user, whether is set to preset user.
Step S600, according to this user of foresee steps, be set to default user, generate also execution of the steering order corresponding with this user.
In embodiments of the present invention, when user selects to be set to default user, first carry out Authority Verification, inputting the password of owner's setting verifies, when being verified, start to arrange, as shown in Figure 3, in step S600, the step that is set to default user according to this user of foresee steps specifically comprises the following steps:
Step S601, the facial characteristics image information that detects according to this are this user numbering of filing.
In embodiments of the present invention, respectively different users is set up to archives according to facial characteristics image information, and be numbered, then fill other characteristic informations of respective user.
Step S602, point out this user to input UCVA or correct defects of vision and need watch continuously the liquid crystal display time.
In embodiments of the present invention, when user this when not configuring glasses, input user's UCVA, when user's wearing spectacles, input and correct defects of vision, watch continuously the liquid crystal display time to refer to that user is from bringing into use liquid crystal display to the time (unit for hour) of finish using liquid crystal display, the liquid crystal display of embodiment of the present invention indication refers generally to the liquid crystal display of computing machine or the liquid crystal display of home television set, can also be the liquid crystal display of the equipment such as mobile phone or flat board.
Step S603, the parameter values that user is inputted are kept in the storage space corresponding with its facial characteristics image information.
In embodiments of the present invention, for each default user opens up new storage space, corresponding stored user's related data.
Further, as shown in Figure 4, in step S600, the step that generates the steering order corresponding with user specifically comprises the following steps:
Step S604, the following formula of basis calculate LED-backlit source brightness amount of amplification △ Y per hour:
；
Step S605, the liquid crystal display initial balance brightness of take are starting point, generate and control the control program that the brightness of LED-backlit source increases with amount of amplification △ Y per hour, are stored in the storage space described in step S603.
Wherein, Y represents the brightness of liquid crystal display initial balance; D is user's UCVA or corrects defects of vision; T watches the liquid crystal display time continuously for user.
In embodiments of the present invention, the brightness of liquid crystal display initial balance is Default Value value, and this value is for parameters intermediate value, and the brightness in LED-backlit source be take Default Value value as basic point, per hourly with △ Y amount of amplification, carries out brightness increase.
Step S700, according to preset instructions, control LED-backlit source and carry out luminance balance adjusting.
It should be noted that: preset instructions is to keep the brightness of LED-backlit source to maintain the constant instruction of Default Value value, to guarantee that the brightness in LED-backlit source remains at original state.
In embodiments of the present invention, because user is in the process of long-time use liquid crystal display, easily cause visual fatigue, user can blink frequently or partly narrow and have in mind, now, the light-inletting quantity of eyes reduces, see that the content in liquid crystal display is just unclear, user can slowly get close to indicator screen in order to see clearly captions or image information on display, make hypometropia or more and more near-sighted, the embodiment of the present invention is identified by the user to different, judge whether it is default user, when for default user, according to presetting user's UCVA or correcting defects of vision and need to use the brightness of the time control LED backlight source for liquid crystal display of liquid crystal display to carry out incremental adjustments, make user when long-term use liquid crystal display, the brightness meeting of liquid crystal display slowly increases, even if its light-inletting quantity of user's half blink also can remain unchanged as far as possible, do not need that user is slowly automatic causes myopia or more serious myopia near display.
Fig. 5 is the framed structure of the LED backlight source for liquid crystal display brightness control system that provides of the embodiment of the present invention, for convenience of explanation, only lists the part relevant to the embodiment of the present invention, and details are as follows:
As shown in Figure 5, the embodiment of the present invention also provides a kind of LED backlight source for liquid crystal display brightness control system 1, comprising:
Detecting unit 100, for detection of the facial characteristics image information of user before liquid crystal display;
Comparing unit 200, for contrasting to obtain similarity by the facial characteristics image information detecting and default facial characteristics image information;
Judging unit 300, for the similarity of obtaining and default similarity threshold being carried out to size relatively, judges before this liquid crystal display according to comparative result whether user is default user;
The first control module 400, carries out luminance balance adjusting for controlling LED-backlit source according to the steering order corresponding with default user;
Tip element 500, for pointing out user whether to be set to default user;
Setting unit 600, for being set to default user according to this user of foresee steps;
Generation unit 700, for generating the steering order corresponding with this user;
Performance element 800, the steering order generating for carrying out this generation unit;
The second control module 900, carries out luminance balance adjusting for controlling LED-backlit source according to preset instructions.
In embodiments of the present invention, detecting unit 100 for detection of user's facial characteristics image information first detects the user nearest with liquid crystal display desired location (as liquid crystal display upper side frame middle), then detect this nearest user's facial characteristics image information, preset instructions is to keep the brightness of LED-backlit source to maintain the constant instruction of Default Value value, to guarantee that the brightness in LED-backlit source remains at original state.
As one embodiment of the invention, the facial characteristics image information that detecting unit 100 detects comprises shape of face, face is wide, eyes are big or small, nose is big or small and relative position separately.
As one embodiment of the invention, judging unit 300 specifically for:
When the similarity of obtaining when comparing unit 200 is more than or equal to default similarity threshold, judge before this liquid crystal display that user is default user;
When the similarity of obtaining when comparing unit 200 is less than default similarity threshold, judge the non-default user of user before this liquid crystal display.
In embodiments of the present invention, default similarity threshold is 70%, and this value can need to be adjusted according to user, for example 80%, and can also be 60%, minimum is 60%.
As one embodiment of the invention, setting unit 600 specifically for:
The facial characteristics image information detecting according to detecting unit 100 is user's numbering of filing;
Prompting user inputs UCVA or corrects defects of vision and need watch continuously the liquid crystal display time;
The parameter values of user's input is kept in the storage space corresponding with its facial characteristics image information.
In embodiments of the present invention, setting unit 600 is opened up new storage space for each default user, corresponding stored user's related data.
As one embodiment of the invention, generation unit 700 specifically for:
According to following formula, calculate LED-backlit source brightness amount of amplification △ Y per hour:
；
The liquid crystal display initial balance brightness of take is starting point, and the control program that generating control LED-backlit source brightness increases with amount of amplification △ Y per hour is stored in this storage space;
Wherein, Y represents the brightness of liquid crystal display initial balance; D is user's UCVA or corrects defects of vision; T watches the liquid crystal display time continuously for user.
It should be noted that: the brightness of liquid crystal display initial balance is Default Value value, this value is for parameters intermediate value, and the brightness in LED-backlit source be take Default Value value as basic point, per hourly with △ Y amount of amplification, carries out brightness increase.
In embodiments of the present invention, because user is in the process of long-time use liquid crystal display, easily cause visual fatigue, user can blink frequently or partly narrow and have in mind, now, the light-inletting quantity of eyes reduces, see that the content in liquid crystal display is just unclear, user can slowly get close to indicator screen in order to see clearly captions or image information on display, make hypometropia or more and more near-sighted, the embodiment of the present invention is identified by the user to different, judge whether it is default user, when for default user, according to presetting user's UCVA or correcting defects of vision and need to use the brightness of the time control LED backlight source for liquid crystal display of liquid crystal display to carry out incremental adjustments, make user when long-term use liquid crystal display, the brightness meeting of liquid crystal display slowly increases, even if its light-inletting quantity of user's half blink also can remain unchanged as far as possible, do not need that user is slowly automatic causes myopia or more serious myopia near display.
It will be appreciated by those skilled in the art that the unit that comprises for above-described embodiment is just divided according to function logic, but be not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit also, just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
Those of ordinary skills it is also understood that, the all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be in being stored in a computer read/write memory medium, described storage medium, comprises ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a method for LED backlight source for liquid crystal display brightness regulation, is characterized in that, said method comprising the steps of:
User's facial characteristics image information before detection LCD monitor;
The facial characteristics image information detecting and default facial characteristics image information are contrasted to obtain similarity;
The similarity of obtaining and default similarity threshold are carried out to size relatively, according to comparative result, judge before described liquid crystal display whether user is default user;
According to the steering order corresponding with default user, to control LED-backlit source and carry out luminance balance adjusting;
No, point out user whether to be set to default user;
Be, according to the described user of foresee steps, be set to default user, generate the steering order corresponding with described user and carry out;
No, according to preset instructions, control LED-backlit source and carry out luminance balance adjusting.
2. the method for claim 1, is characterized in that, described facial characteristics image information comprises shape of face, face is wide, eyes are big or small, nose is big or small and relative position separately.
3. the method for claim 1, is characterized in that, described the similarity of obtaining and default similarity threshold is carried out to size relatively, according to comparative result, judges that whether user before described liquid crystal display is that default user's step is specially:
When the described similarity of obtaining is more than or equal to described default similarity threshold, judge that the front user of described liquid crystal display is for default user;
When the described similarity of obtaining is less than described default similarity threshold, judge the front non-default user of user of described liquid crystal display.
4. the method for claim 1, is characterized in that, the described step that is set to default user according to the described user of foresee steps is specially:
According to the described facial characteristics image information detecting, it is the described user numbering of filing;
Point out described user to input UCVA or correct defects of vision and need watch continuously the liquid crystal display time;
The parameter values of user's input is kept in the storage space corresponding with its facial characteristics image information.
5. method as claimed in claim 4, is characterized in that, the step of the steering order that described generation is corresponding with described user is specially:
According to following formula, calculate LED-backlit source brightness amount of amplification △ Y per hour:
；
The liquid crystal display initial balance brightness of take is starting point, and the control program that generating control LED-backlit source brightness increases with amount of amplification △ Y per hour is stored in described storage space;
Wherein, Y represents the brightness of liquid crystal display initial balance; D is user's UCVA or corrects defects of vision; T watches the liquid crystal display time continuously for user.
6. a LED backlight source for liquid crystal display brightness control system, is characterized in that, described system comprises:
Detecting unit, for detection of the facial characteristics image information of user before liquid crystal display;
Comparing unit, for contrasting to obtain similarity by the facial characteristics image information detecting and default facial characteristics image information;
Judging unit, for the similarity of obtaining and default similarity threshold being carried out to size relatively, judges before described liquid crystal display according to comparative result whether user is default user;
The first control module, carries out luminance balance adjusting for controlling LED-backlit source according to the steering order corresponding with default user;
Tip element, for pointing out user whether to be set to default user;
Setting unit, for being set to default user according to the described user of foresee steps;
Generation unit, for generating the steering order corresponding with described user;
Performance element, the steering order generating for carrying out described generation unit;
The second control module, carries out luminance balance adjusting for controlling LED-backlit source according to preset instructions.
7. system as claimed in claim 6, is characterized in that, described facial characteristics image information comprises shape of face, face is wide, eyes are big or small, nose is big or small and relative position separately.
8. system as claimed in claim 6, is characterized in that, described judging unit specifically for:
When the described similarity of obtaining is more than or equal to described default similarity threshold, judge that the front user of described liquid crystal display is for default user;
When the described similarity of obtaining is less than described default similarity threshold, judge the front non-default user of user of described liquid crystal display.
9. system as claimed in claim 6, is characterized in that, described setting unit specifically for:
According to the described facial characteristics image information detecting, it is the described user numbering of filing;
Point out described user to input UCVA or correct defects of vision and need watch continuously the liquid crystal display time;
The parameter values of user's input is kept in the storage space corresponding with its facial characteristics image information.
10. system as claimed in claim 9, is characterized in that, described generation unit specifically for:
According to following formula, calculate LED-backlit source brightness amount of amplification △ Y per hour:
；
The liquid crystal display initial balance brightness of take is starting point, and the control program that generating control LED-backlit source brightness increases with amount of amplification △ Y per hour is stored in described storage space;
Wherein, Y represents the brightness of liquid crystal display initial balance; D is user's UCVA or corrects defects of vision; T watches the liquid crystal display time continuously for user.
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| CN104008732B (en) | 2016-03-09 |
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