CN105280159A - Backlight regulating method of display equipment and display equipment - Google Patents
Backlight regulating method of display equipment and display equipment Download PDFInfo
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- CN105280159A CN105280159A CN201410374560.3A CN201410374560A CN105280159A CN 105280159 A CN105280159 A CN 105280159A CN 201410374560 A CN201410374560 A CN 201410374560A CN 105280159 A CN105280159 A CN 105280159A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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Abstract
The invention relates to the technical field of electronics, and provides a backlight regulating method of display equipment. The backlight regulating method includes: detecting current environment brightness through a photosensitive sensor of the display equipment, so as to obtain a photosensitive brightness value; and according to the photosensitive brightness value, a first brightness value of the current environment which is detected by a first image sensor of the display equipment and a second brightness value of the current environment which is detected by a second image sensor of the display equipment, regulating backlight brightness of the display equipment. The invention also provides display equipment, control is performed according to the abovementioned method, and the backlight regulating method of the display equipment and the display equipment can realize accurate judgment of ambient light, and bring good user experience.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of backlight adjusting method and display device thereof of display device.
Background technology
Present mobile terminal device has the function of automatic adjusting screen backlight illumination as mobile phone, usually adopts light sensor to realize.Light sensor carrys out adjusting screen brightness by perception current environmental light brightness, when environmental light intensity, improves screen intensity, when surround lighting is weak, reduces screen intensity.
Realizing in process of the present invention, inventor finds that in prior art, there are the following problems:
Light sensor affects by factors such as open-celled structure, glass transmission rate, lightwave spectrum differences, truly cannot reflect Human Perception light under dark situation.
Summary of the invention
Affect by factors such as open-celled structure, glass transmission rate, lightwave spectrum differences for overcoming light sensor in prior art, Human Perception light truly cannot be reflected under dark situation, and the problem such as the data error collected is very large, the embodiment of the present invention provides a kind of backlight adjusting method of display device on the one hand, comprising:
Detect current environment brightness by the light sensor of described display device, obtain photosensitive brightness value;
Second brightness value of the current environment that the first brightness value of current environment detected according to the first imageing sensor of described photosensitive brightness value, described display device and the second imageing sensor of described display device detect, regulates the backlight illumination of described display device.
On the other hand, the embodiment of the present invention additionally provides a kind of display device, and described display device comprises light sensor, the first imageing sensor and the second imageing sensor, comprising:
Receiver module, for receiving the photosensitive brightness value that the brightness of described light sensor detection current environment obtains;
Processing module, the first brightness value of current environment detected for the described photosensitive brightness value received according to described receiver module, described first imageing sensor and the second brightness value of the current environment of described second imageing sensor detection, regulate the backlight illumination of described display device.
Because light sensor is by open-celled structure, glass transmission rate, the factor impacts such as lightwave spectrum difference, Human Perception light truly cannot be reflected under low light environment, and the current environment brightness value of the acquisition of imageing sensor is responsive and stable under low light environment, the trickle change of current environment light can be caught accurately, therefore, the embodiment of the present invention is according to photosensitive brightness value, and the first imageing sensor of display device, the current environment brightness value that second imageing sensor detects, regulate the backlight illumination of display device, like this, in conjunction with photosensitive brightness value and the first imageing sensor, the current environment brightness value that second imageing sensor detects, more can react the true brightness value of current environment, corresponding adjustably backlight illumination is more suitable for human eye viewing, improve Consumer's Experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the first embodiment of the backlight adjusting method of display device of the present invention;
Fig. 2 is the schematic flow sheet of the second embodiment of the backlight adjusting method of display device of the present invention;
Fig. 3 is the schematic flow sheet of the 3rd embodiment of the backlight adjusting method of display device of the present invention;
Fig. 4 is the schematic flow sheet of the 4th embodiment of the backlight adjusting method of display device of the present invention;
Fig. 5 is the schematic flow sheet of the 5th embodiment of the backlight adjusting method of display device of the present invention;
Fig. 6 is the structural representation of the first embodiment of display device of the present invention;
Fig. 7 is the structural representation of the 3rd embodiment of display device of the present invention;
Fig. 8 is the structural representation of the 5th embodiment of display device of the present invention.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, 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, be not intended to limit the present invention.
Please refer to Fig. 1, is the schematic flow sheet of the first embodiment of the backlight adjusting method of display device of the present invention.This backlight adjusting method comprises:
Step S11, detects current environment brightness by the light sensor of display device, obtains photosensitive brightness value.
Described light sensor can be that display device backstage acquiescence is opened or automatically opened after display device backlight open being detected or operate unlatching by User Defined.
Step S12, the second brightness value of the current environment that the first brightness value of current environment detected according to the first imageing sensor of photosensitive brightness value, display device and the second imageing sensor of display device detect, regulates the backlight illumination of display device.
First imageing sensor and second imageing sensor of display device can start simultaneously, the light levels of current environment light is detected with light sensor simultaneously, to save detection time, save backlight regulate before step, the very first time provides backlight illumination accurately for user;
First imageing sensor and second imageing sensor of display device also can start successively, detect respectively with light sensor to current environment light.To save system resource, reduce equipment energy consumption.In the present embodiment, the first imageing sensor and the second imageing sensor are for start successively.
In the present embodiment, if one of the first imageing sensor and the second imageing sensor cannot normally start, then use and can start the light levels that normal imageing sensor and light sensor detect current environment light; If the first imageing sensor and the second imageing sensor all cannot normally start, then not adjusting backlight luminance, and prompt window is ejected in display device screen, reminding user checks that whether current display setup state is normal.
Camerasensorisp (camera sensing device image-signal processor) can provide a parameter value about current environment brightness (i.e. the first brightness value or the second brightness value): cameraluma (shooting brightness).Cameraluma value is mainly used in calculating aperture time in camera (camera) module.Here our current environment brightness value that current cameraluma value can be detected as imageing sensor.
Cameraluma value is responsive and stable under low light environment, the trickle change of current environment light can be caught accurately, feedback is rapid, reliability is high, can make correct judgement by the light levels of fill-in light dependent sensor to current environment light by cameraluma value.
In the present embodiment, preposition imageing sensor in first imageing sensor preferred display device, second imageing sensor is the rearmounted imageing sensor on display device, for mobile phone, described first imageing sensor can be the imageing sensor of the front-facing camera of mobile phone, and described second imageing sensor can be the imageing sensor of the post-positioned pick-up head of mobile phone.Generally, preposition imageing sensor and the eyes of user are in same lightness environment, therefore, by the current environment brightness value that preposition imageing sensor gathers, more can the environmental light brightness of Obtaining Accurate eyes of user institute perception, the ambient brightness value obtained according to preposition imageing sensor adjusts backlight illumination and can bring better Consumer's Experience.Meanwhile, rearmounted imageing sensor auxiliary front mounted imageing sensor carries out auxiliary detection to current environment brightness, makes display device have overall judgement to ambient brightness, prevents the erroneous judgement situation caused because ambient lighting is uneven, improve brightness detecting reliability.
Because light sensor is by open-celled structure, glass transmission rate, the factor impacts such as lightwave spectrum difference, Human Perception light truly cannot be reflected under low light environment, and the current environment brightness value of the acquisition of imageing sensor is responsive and stable under low light environment, the trickle change of current environment light can be caught accurately, therefore, the embodiment of the present invention is according to photosensitive brightness value, and the first imageing sensor of display device, the current environment brightness value that second imageing sensor detects, regulate the backlight illumination of display device, like this, in conjunction with photosensitive brightness value and the first imageing sensor, the current environment brightness value that second imageing sensor detects, more can react the true brightness value of current environment, corresponding adjustably backlight illumination is more suitable for human eye viewing, improve Consumer's Experience.Simultaneously, when one of described first imageing sensor and the second imageing sensor cannot normally start, the imageing sensor that can normally work and light sensor can be used to detect the light levels of current environment light, make full use of the hardware resource of display device, further increase the reliability that ambient brightness detects
Please refer to Fig. 2, is the schematic flow sheet of the second embodiment of the backlight adjusting method of display device of the present invention.This backlight adjusting method comprises:
Step S21, detects current environment brightness by the light sensor of display device, obtains photosensitive brightness value.
Described light sensor can be that display device backstage acquiescence is opened or automatically opened after display device backlight open being detected or operate unlatching by User Defined.
Step S22, according to photosensitive brightness value, and current environment brightness value, regulates the backlight illumination of described display device, and described current environment brightness value is the maximal value in the first brightness value and the second brightness value.
Current environment brightness value can be each value simultaneously of the first brightness value and the second brightness value once, and the higher value obtained of comparing; Also can be each value simultaneously of the first brightness value and the second brightness value repeatedly, and the maximal value obtained that all values is compared; Can also be that some values of being got by the first brightness value are taken the mean, some values of being got by the second brightness value be taken the mean, the higher value obtained of being compared by above-mentioned two averages.
In the present embodiment, the each value simultaneously of described first brightness value and the second brightness value 8 times, Selecting time is spaced apart 50ms, get larger in 8 numerical value in the first brightness value 4 and calculate average, be defined as the first brightness average, get larger in 8 numerical value in the second brightness value 4 and calculate average, be defined as the second brightness average, current environment brightness value is the higher value obtained compared with the second brightness average by the first brightness average.
Using the maximal value of the first brightness value and the second brightness value as current environment brightness value, and according to photosensitive brightness value and current environment brightness value adjusting backlight luminance, make this backlight illumination can ensure when current maximum ambient brightness for user normally, promote user's experience; Meanwhile, by using the higher value of the first average brightness and the second average brightness as the scheme of ambient brightness value, effectively can avoid because the detection of the factors such as instantaneous flash to surround lighting light levels causes interference, improve the acquisition reliability of current environment brightness value.
Please refer to Fig. 3, is the schematic flow sheet of the 3rd embodiment of the backlight adjusting method of display device of the present invention.This backlight adjusting method comprises:
Step S31, detects current environment brightness by the light sensor of display device, obtains photosensitive brightness value.
Described light sensor can be that display device backstage acquiescence is opened or automatically opened after display device backlight open being detected or operate unlatching by User Defined.
Step S32, determines that described photosensitive brightness value is positioned within default photosensitive brightness range, is detected the change of current environment brightness, obtain photosensitive brightness changing value by described light sensor.
The photosensitive brightness range preset is specially the brightness range corresponding to low light environment, its concrete value range can be [1,20) lux.So-called photosensitive brightness changing value was the difference of the photosensitive brightness value that the photosensitive brightness value of the current acquisition of light sensor and a upper cycle (this cycle can according to circumstances predefine) obtain.Only once or after continuous several times falls into default photosensitive brightness range, can determine that photosensitive brightness value is positioned within default photosensitive brightness range at the photosensitive brightness value periodically detected by light sensor.In this step, after the photosensitive brightness value continuous several times (as 8 times) that preferred light dependent sensor periodically detects falls into default photosensitive brightness range, then determine that photosensitive brightness value is positioned at default photosensitive brightness range, thus avoid because photosensitive shake brings the frequent opening and closing of imageing sensor.
Step S33, compares photosensitive brightness changing value with first threshold, if photosensitive brightness changing value is greater than first threshold, then performs step S34, if be less than first threshold, then performs step S35.
In this step, if photosensitive brightness changing value is greater than 10lux, then determine that the current residing ambient brightness of display device there occurs change, the cameraluma value as the first brightness value, the second brightness value is obtained by camerasensorisp, and based on current environment brightness value, backlight illumination is regulated, with the environment for use making current backlight brightness be more suitable for active user.
Step S34, detects current environment brightness by described first imageing sensor and described second imageing sensor, obtains current environment brightness value, according to current environment brightness value adjusting backlight luminance.
In this step, after successfully obtaining current environment brightness value by the first imageing sensor and the second imageing sensor, can only according to current environment brightness value adjusting backlight luminance, also can according to the first brightness value, the second brightness value and current photosensitive brightness value adjusting backlight luminance.
Step S35, keeps current backlight brightness constant.
In the present embodiment, ongoing camera auxiliary judgment (namely the so-called camera of unlatching auxiliary judgment opens camerasensorisp and obtain the cameraluma value as ambient brightness value) can be stopped immediately when not needing automatic backlight.The situation of automatic backlight is not wherein needed to comprise following several: mobile phone is just being in operation and is automatically cutting out automatic backlight; Screen state enters dark screen, or the screen that goes out (manually go out screen or time-out to go out screen); Proximity transducer state switches to close; Mobile phone continuation of the journey state switches to ultra electric power-saving mode, meanwhile, does not start camera auxiliary judgment without exception under ultra electric power-saving mode; Enter talking state, calling, incoming call, answer state under all do not start camera auxiliary judgment; Generation state above when carrying out auxiliary judgment, when needing to stop auxiliary judgment immediately.Above-mentioned arbitrary situation does not all open camera auxiliary judgment.
Owing to opening the first imageing sensor for a long time, second imageing sensor can consume the electric energy of display device particularly mobile phone very soon, therefore, the embodiment of the present invention periodically obtains photosensitive brightness value by light sensor, default photosensitive brightness range is positioned at photosensitive brightness value, and photosensitive brightness changing value is when being greater than first threshold, just open the first imageing sensor, second imageing sensor obtains current environment brightness value, and at the first imageing sensor, after second imageing sensor obtains the success of current environment brightness value, closed, to reach power saving and to avoid frequently opening the first imageing sensor, the object of the second imageing sensor.
Please refer to Fig. 4, is the schematic flow sheet of the 4th embodiment of the backlight adjusting method of display device of the present invention.This backlight adjusting method comprises:
Step S41, detects current environment brightness by the light sensor of display device, obtains photosensitive brightness value.
Described light sensor can be that display device backstage acquiescence is opened or automatically opened after display device backlight open being detected or operate unlatching by User Defined.
Step S42, if photosensitive brightness value is by entering within default photosensitive brightness range outside the photosensitive brightness range preset, open the first imageing sensor and the brightness of the second imageing sensor detection current environment, obtain current environment brightness value, and according to current environment brightness value adjusting backlight luminance.
Wherein, the photosensitive brightness range preset is specially the brightness range corresponding to low light environment, its concrete value range can be [1,17) lux.In this step, " open the first imageing sensor and the brightness of the second imageing sensor detection current environment; obtain current environment brightness value, and according to current environment brightness value adjusting backlight luminance " identical with the step S34 introduced in detail hereinbefore, therefore be not repeated herein.
Determining that photosensitive brightness value to be positioned within default photosensitive brightness range after (namely under low light environment), the photosensitive brightness range preset is redefined to [1,20) lux, can effectively prevent from, because ambient brightness causes display device repeatedly to switch under different light environments close to 17lux, causing burden to system.
Further, when confirming that display device is currently located under low light environment, open corresponding camerasensorisp and obtain the cameraluma value as ambient brightness value, being detected the change of current environment brightness by described light sensor, obtain photosensitive brightness changing value.If photosensitive brightness changing value is greater than first threshold, detects current environment brightness by the first imageing sensor and the second imageing sensor, obtain current environment brightness value, according to current environment brightness value adjusting backlight luminance; If photosensitive brightness changing value is less than first threshold, keep current backlight brightness constant.
Further, if light sensor detect that photosensitive brightness value is appointed and once do not dropped on [1,20) within the scope of lux, then judge that current environment has exited low light environment, and recover described default photosensitive brightness range values [1,17) lux.
By the real-time detection to photosensitive brightness value, confirming that photosensitive brightness value enters very first time within default photosensitive brightness range, starting camera auxiliary judgment and also backlight illumination is regulated, to user with experience fast and accurately.
Please refer to Fig. 5, is the schematic flow sheet of the 5th embodiment of the backlight adjusting method of display device of the present invention.This backlight adjusting method comprises:
Step S51, detects current environment brightness by the light sensor of display device, obtains photosensitive brightness value.
Described light sensor can be that display device backstage acquiescence is opened or automatically opened after display device backlight open being detected or operate unlatching by User Defined.
Step S52, determines that photosensitive brightness value is greater than the higher limit of default photosensitive brightness range, then based on photosensitive brightness value, regulate the backlight illumination of display device;
In the present embodiment, in order to simplify judgement flow process, save system resource in limited time when described photosensitive brightness value is greater than the upper of described default photosensitive brightness range, closedown cameraluma auxiliary judgment, is controlled backlight illumination by light sensor.
Step S53, determine that photosensitive brightness value is less than the lower limit of default photosensitive brightness range, then detect current environment brightness by the first imageing sensor and the second figure image sensor, obtain current environment brightness value, if current environment brightness value is less than Second Threshold, then using preset minimum backlight brightness as current backlight brightness.
Prescribe a time limit when described photosensitive brightness value is not more than the upper of described default photosensitive brightness range, judge the lower limit whether described photosensitive brightness value is less than described default photosensitive brightness range further, in the present embodiment, get described lower limit and be tending towards 0lux, when light sensor detects that current photosensitive brightness value is 0lux, current environment brightness value is detected by the first imageing sensor and the second imageing sensor, judge whether current environment brightness value is less than the second threshold values, in the present embodiment, described second threshold values is environment for use is the brightness value that total darkness environment is corresponding, if, then judge that the environment for use of current display setup is total darkness environment, use minimum backlight brightness as current backlight brightness.In like manner, in order to avoid photosensitive shake further, after judging that the environment for use of current display setup is total darkness environment, the lower limit of described photosensitive brightness range is redefined as 2lux.
By detecting photosensitive brightness value in real time, when described photosensitive brightness value is positioned at outside described default photosensitive brightness range, corresponding solution is provided, can effectively saves the display device energy, save system resource.
Detailed introduction is done to the embodiment of the backlight adjusting method of display device of the present invention above.Below the device (i.e. display device) corresponding to said method is further elaborated.Wherein, display device can be the display device of the band backlight regulatory functions such as mobile phone, panel computer, MP3, MP4 or notebook computer.
Please refer to Fig. 6, is the structural representation of the first embodiment of display device of the present invention.
Display device 100 comprises: light sensor 110, first imageing sensor 120, second imageing sensor 130, receiver module 140 and processing module 150.
Wherein, receiver module 140, is connected with light sensor 110 and processing module 150 respectively, for receiving the photosensitive brightness value that the brightness of described light sensor detection current environment obtains.
Processing module 150, be connected with the first imageing sensor 120, second imageing sensor 130 and receiver module 140 respectively, second brightness value of the current environment that the first brightness value of the current environment detected for the photosensitive brightness value of the current environment that detects according to light sensor 110, the first imageing sensor 120 and the second imageing sensor 130 detect, regulates the backlight illumination of display device 100.
First imageing sensor 120 of display device 100 and the second imageing sensor 130 can start simultaneously, the light levels of current environment light is detected with light sensor 110 simultaneously, to save detection time, save backlight regulate before step, the very first time provides backlight illumination accurately for user;
First imageing sensor 120 of display device 100 and the second imageing sensor 130 also can start successively, detect respectively with light sensor 110 pairs of current environment light.To save system resource, reduce equipment energy consumption.In the present embodiment, the first imageing sensor 120 and the second imageing sensor 130 are for start successively.
In the present embodiment, if one of the first imageing sensor 120 and the second imageing sensor 130 cannot normally start, then use and can start the light levels that normal imageing sensor and light sensor 110 detect current environment light; If the first imageing sensor 120 and the second imageing sensor 130 all cannot normally start, then not adjusting backlight luminance, and prompt window is ejected in display device screen, reminding user checks that whether current display setup state is normal.
Camerasensorisp (camera sensing device image-signal processor) can provide a parameter value about current environment brightness (i.e. the first brightness value or the second brightness value): cameraluma (shooting brightness).Cameraluma value is mainly used in calculating aperture time in camera (camera) module.Here our current environment brightness value that cameraluma value can be detected as imageing sensor.
Cameraluma value is responsive and stable under low light environment, the trickle change of current environment light can be caught accurately, feedback is rapid, reliability is high, can make correct judgement by the light levels of fill-in light dependent sensor to current environment light by current cameraluma value.
In the present embodiment, first imageing sensor 120 is preferably the preposition imageing sensor on display device 100, second imageing sensor 130 is the rearmounted imageing sensor on display device 100, for mobile phone, described first imageing sensor can be the imageing sensor of the front-facing camera of mobile phone, and described second imageing sensor can be the imageing sensor of the post-positioned pick-up head of mobile phone.Generally, preposition imageing sensor and the eyes of user are in same lightness environment, therefore, by the current environment brightness value that preposition imageing sensor gathers, more can the environmental light brightness of Obtaining Accurate eyes of user institute perception, the ambient brightness value obtained according to preposition imageing sensor adjusts backlight illumination and can bring better Consumer's Experience.Meanwhile, rearmounted imageing sensor auxiliary front mounted imageing sensor carries out auxiliary detection to current environment brightness, makes display device have overall judgement to ambient brightness, prevents the erroneous judgement situation caused because ambient lighting is uneven, improve brightness detecting reliability.
Because light sensor is by open-celled structure, glass transmission rate, the factor impacts such as lightwave spectrum difference, Human Perception light truly cannot be reflected under low light environment, and the current environment brightness value of the acquisition of imageing sensor is responsive and stable under low light environment, the trickle change of current environment light can be caught accurately, therefore, the embodiment of the present invention is according to photosensitive brightness value, and the first imageing sensor of display device, the current environment brightness value that second imageing sensor detects, regulate the backlight illumination of display device, like this, in conjunction with photosensitive brightness value and the first imageing sensor, the current environment brightness value that second imageing sensor detects, more can react the true brightness value of current environment, corresponding adjustably backlight illumination is more suitable for human eye viewing, improve Consumer's Experience.Simultaneously, when one of described first imageing sensor 120 and the second imageing sensor 130 cannot normally start, the imageing sensor that can normally work and light sensor 110 can be used to detect the light levels of current environment light, make full use of the hardware resource of display device 100, further increase the reliability that ambient brightness detects.
As the second embodiment of display device of the present invention, with the first embodiment of above-mentioned display device unlike, the described photosensitive brightness value of described processing module 150 specifically for receiving according to described receiver module 140, and current environment brightness value, regulate the backlight illumination of described display device 100, described current environment brightness value is the maximal value in described first brightness value and described second brightness value.
Current environment brightness value can be each value simultaneously of the first brightness value and the second brightness value once, and the higher value obtained of comparing; Also can be each value simultaneously of the first brightness value and the second brightness value repeatedly, and the maximal value obtained that all values is compared; Can also be that some values of being got by the first brightness value are taken the mean, some values of being got by the second brightness value be taken the mean, the higher value obtained of being compared by above-mentioned two averages.
In the present embodiment, the each value simultaneously of described first brightness value and the second brightness value 8 times, Selecting time is spaced apart 50ms, get larger in 8 numerical value in the first brightness value 4 and calculate average, be defined as the first brightness average, get larger in 8 numerical value in the second brightness value 4 and calculate average, be defined as the second brightness average, current environment brightness value is the higher value obtained compared with the second brightness average by the first brightness average.
Using the maximal value of the first brightness value and the second brightness value as current environment brightness value, and according to photosensitive brightness value and current environment brightness value adjusting backlight luminance, make this backlight illumination can ensure when current maximum ambient brightness for user normally, promote user's experience; Meanwhile, by using the higher value of the first average brightness and the second average brightness as the scheme of ambient brightness value, effectively can avoid because the detection of the factors such as instantaneous flash to surround lighting light levels causes interference, improve the acquisition reliability of current environment brightness value.
Please refer to Fig. 7, is the structural representation of the 3rd embodiment of display device of the present invention.
With the first embodiment of above-mentioned display device unlike, described processing module 150 comprises:
Photosensitive brightness changing value acquiring unit 151, for determining that the photosensitive brightness value that described light sensor 110 detects is positioned within default photosensitive brightness range, being detected the change of current environment brightness, obtaining photosensitive brightness changing value by described light sensor 110;
The photosensitive brightness range preset is specially the brightness range corresponding to low light environment, its concrete value range can be [1,20) lux.So-called photosensitive brightness changing value was the difference of the photosensitive brightness value that the photosensitive brightness value of the current acquisition of light sensor and a upper cycle (this cycle can according to circumstances predefine) obtain.Only once or after continuous several times falls into default photosensitive brightness range, can determine that photosensitive brightness value is positioned within default photosensitive brightness range at the photosensitive brightness value periodically detected by light sensor.In this step, after the photosensitive brightness value continuous several times (as 8 times) that preferred light dependent sensor periodically detects falls into default photosensitive brightness range, then determine that photosensitive brightness value is positioned at default photosensitive brightness range, thus avoid because photosensitive shake brings the frequent opening and closing of imageing sensor.
First regulon 152, if the described photosensitive brightness changing value obtained for described photosensitive brightness changing value acquiring unit 151 is greater than first threshold, then detect current environment brightness by described first imageing sensor 120 and described second imageing sensor 130, obtain described current environment brightness value, and according to described current environment brightness value adjusting backlight luminance; If described photosensitive brightness changing value is less than described first threshold, keep current backlight brightness constant.
In this step, if photosensitive brightness changing value is greater than 10lux, then determine that the current residing ambient brightness of display device there occurs change, the cameraluma value as the first brightness value, the second brightness value is obtained by camerasensorisp, and based on current environment brightness value, backlight illumination is regulated, with the environment for use making current backlight brightness be more suitable for active user.
In the present embodiment, after successfully obtaining current environment brightness value by the first imageing sensor 120 and the second imageing sensor 130, can only according to current environment brightness value adjusting backlight luminance, also can according to the first brightness value, the second brightness value and current photosensitive brightness value adjusting backlight luminance.
In the present embodiment, ongoing camera auxiliary judgment (namely the so-called camera of unlatching auxiliary judgment opens camerasensorisp and obtain the cameraluma value as ambient brightness value) can be stopped immediately when not needing automatic backlight.The situation of automatic backlight is not wherein needed to comprise following several: mobile phone is just being in operation and is automatically cutting out automatic backlight; Screen state enters dark screen, or the screen that goes out (manually go out screen or time-out to go out screen); Proximity transducer state switches to close; Mobile phone continuation of the journey state switches to ultra electric power-saving mode, meanwhile, does not start camera auxiliary judgment without exception under ultra electric power-saving mode; Enter talking state, calling, incoming call, answer state under all do not start camera auxiliary judgment; Generation state above when carrying out auxiliary judgment, when needing to stop auxiliary judgment immediately.Above-mentioned arbitrary situation does not all open camera auxiliary judgment.
Owing to opening the first imageing sensor for a long time, second imageing sensor can consume the electric energy of display device particularly mobile phone very soon, therefore, the embodiment of the present invention periodically obtains photosensitive brightness value by light sensor, default photosensitive brightness range is positioned at photosensitive brightness value, and photosensitive brightness changing value is when being greater than first threshold, just open the first imageing sensor, second imageing sensor obtains current environment brightness value, and at the first imageing sensor, after second imageing sensor obtains the success of current environment brightness value, closed, to reach power saving and to avoid frequently opening the first imageing sensor, the object of the second imageing sensor.
As the 4th embodiment of display device of the present invention, with the 3rd embodiment of above-mentioned display device 100 unlike, if described processing module 150 is further used for the described photosensitive brightness value of described receiver module 140 reception by entering within default photosensitive brightness range outside the photosensitive brightness range preset, open described first imageing sensor 120 and described second imageing sensor 130 detects current environment brightness, obtain described current environment brightness value, and according to described current environment brightness value adjusting backlight luminance.
Wherein, the photosensitive brightness range preset is specially the brightness range corresponding to low light environment, its concrete value range can be [1,17) lux.In this step, " open the first imageing sensor and the brightness of the second imageing sensor detection current environment; obtain current environment brightness value, and according to current environment brightness value adjusting backlight luminance " identical with the step S34 introduced in detail hereinbefore, therefore be not repeated herein.
Determining that photosensitive brightness value to be positioned within default photosensitive brightness range after (namely under low light environment), the photosensitive brightness range preset is redefined to [1,20) lux, can effectively prevent from, because ambient brightness causes display device repeatedly to switch under different light environments close to 17lux, causing burden to system.
Further, when confirming that display device is currently located under low light environment, open corresponding camerasensorisp and obtain the cameraluma value as ambient brightness value, being detected the change of current environment brightness by described light sensor, obtain photosensitive brightness changing value.If photosensitive brightness changing value is greater than first threshold, detects current environment brightness by the first imageing sensor and the second imageing sensor, obtain current environment brightness value, according to current environment brightness value adjusting backlight luminance; If photosensitive brightness changing value is less than first threshold, keep current backlight brightness constant.
Further, if light sensor detect that photosensitive brightness value is appointed and once do not dropped on [1,20) within the scope of lux, then judge that current environment has exited low light environment, and recover described default photosensitive brightness range values [1,17) lux.
By the real-time detection to photosensitive brightness value, confirming that photosensitive brightness value enters very first time within default photosensitive brightness range, starting camera auxiliary judgment and also backlight illumination is regulated, to user with experience fast and accurately.
Please refer to Fig. 8, is the structural representation of the 5th embodiment of display device of the present invention.
With the first embodiment of above-mentioned display device 100 unlike, described processing module 150 comprises:
Second regulon 153, for determining that described photosensitive brightness value that described receiver module 140 receives is greater than the higher limit of described default photosensitive brightness range, then based on described photosensitive brightness value, regulates the backlight illumination of described display device 100;
3rd regulon 154, for determining that described photosensitive brightness value that described receiver module 140 receives is less than the lower limit of described default photosensitive brightness range, then detect current environment brightness by described first imageing sensor 120 and described second figure image sensor 130, obtain described current environment brightness value, if described current environment brightness value is less than Second Threshold, then using preset minimum backlight brightness as current backlight brightness.
In the present embodiment, in order to simplify judgement flow process, save system resource in limited time when described photosensitive brightness value is greater than the upper of described default photosensitive brightness range, closedown cameraluma auxiliary judgment, is controlled backlight illumination by light sensor.
Prescribe a time limit when described photosensitive brightness value is not more than the upper of described default photosensitive brightness range, judge the lower limit whether described photosensitive brightness value is less than described default photosensitive brightness range further, in the present embodiment, get described lower limit and be tending towards 0lux, when light sensor detects that current photosensitive brightness value is 0lux, current environment brightness value is detected by the first imageing sensor 120 and the second imageing sensor 130, judge whether current environment brightness value is less than the second threshold values, in the present embodiment, described second threshold values is environment for use is the brightness value that total darkness environment is corresponding, if, then judge that the environment for use of current display setup 100 is total darkness environment, use minimum backlight brightness as current backlight brightness.In like manner, in order to avoid photosensitive shake further, after judging that the environment for use of current display setup is total darkness environment, the lower limit of described photosensitive brightness range is redefined as 2lux.
By detecting photosensitive brightness value in real time, when described photosensitive brightness value is positioned at outside described default photosensitive brightness range, corresponding solution is provided, can effectively saves the display device energy, save system resource.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc.
When the embodiment of the present invention mentions the ordinal number such as " first ", " second ", unless the meaning of based on context its certain order of representation, should be understood to has been only the use of differentiation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a backlight adjusting method for display device, is characterized in that, comprising:
Detect current environment brightness by the light sensor of described display device, obtain photosensitive brightness value;
Second brightness value of the current environment that the first brightness value of current environment detected according to the first imageing sensor of described photosensitive brightness value, described display device and the second imageing sensor of described display device detect, regulates the backlight illumination of described display device.
2. backlight adjusting method as claimed in claim 1, it is characterized in that, second brightness value of the current environment that first brightness value of current environment of described the first imageing sensor detection according to described photosensitive brightness value, described display device and the second imageing sensor of described display device detect, regulate the backlight illumination of described display device, comprising:
According to described photosensitive brightness value, and current environment brightness value, regulate the backlight illumination of described display device, described current environment brightness value is the maximal value in described first brightness value and described second brightness value.
3. backlight adjusting method as claimed in claim 2, is characterized in that, described according to described photosensitive brightness value, and current environment brightness value, regulates the backlight illumination of described display device, comprising:
Determine that described photosensitive brightness value is positioned within default photosensitive brightness range, detected the change of current environment brightness by described light sensor, obtain photosensitive brightness changing value;
If described photosensitive brightness changing value is greater than first threshold, detects current environment brightness by described first imageing sensor and described second imageing sensor, obtain described current environment brightness value, and according to described current environment brightness value adjusting backlight luminance;
If described photosensitive brightness changing value is less than described first threshold, keep current backlight brightness constant.
4. backlight adjusting method as claimed in claim 2, is characterized in that, described according to described photosensitive brightness value, and described current environment brightness value, regulates the backlight illumination of described display device, comprising:
If described photosensitive brightness value is by entering within default photosensitive brightness range outside the photosensitive brightness range preset, open described first imageing sensor and described second imageing sensor detection current environment brightness, obtain described current environment brightness value, and according to described current environment brightness value adjusting backlight luminance.
5. described backlight adjusting method as claimed in claim 2, is characterized in that, described according to described photosensitive brightness value, and described current environment brightness value, regulates the backlight illumination of described display device, comprising:
Determine that described photosensitive brightness value is greater than the higher limit of described default photosensitive brightness range, then based on described photosensitive brightness value, regulate the backlight illumination of described display device;
Determine that described photosensitive brightness value is less than the lower limit of described default photosensitive brightness range, then detect current environment brightness by described first imageing sensor and described second figure image sensor, obtain described current environment brightness value, if described current environment brightness value is less than Second Threshold, then using preset minimum backlight brightness as current backlight brightness.
6. the screen backlight control method as described in any one of claim 1-5, is characterized in that, described first imageing sensor is the preposition imageing sensor on described display device, and described second imageing sensor is the rearmounted imageing sensor on described display device.
7. a display device, described display device comprises light sensor, the first imageing sensor and the second imageing sensor, it is characterized in that, comprising:
Receiver module, for receiving the photosensitive brightness value that the brightness of described light sensor detection current environment obtains;
Processing module, the first brightness value of current environment detected for the described photosensitive brightness value received according to described receiver module, described first imageing sensor and the second brightness value of the current environment of described second imageing sensor detection, regulate the backlight illumination of described display device.
8. display device as claimed in claim 7, it is characterized in that, the described photosensitive brightness value of described processing module specifically for receiving according to described receiver module, and current environment brightness value, regulate the backlight illumination of described display device, described current environment brightness value is the maximal value in described first brightness value and described second brightness value.
9. display device as claimed in claim 8, it is characterized in that, described processing module comprises:
Photosensitive brightness changing value acquiring unit, for determining that the described photosensitive brightness value that described receiver module receives is positioned within default photosensitive brightness range, being detected the change of current environment brightness, obtaining photosensitive brightness changing value by described light sensor;
First regulon, if the described photosensitive brightness changing value obtained for described photosensitive brightness changing value acquiring unit is greater than first threshold, then detect current environment brightness by described first imageing sensor and described second imageing sensor, obtain described current environment brightness value, and according to described current environment brightness value adjusting backlight luminance; If described photosensitive brightness changing value is less than described first threshold, keep current backlight brightness constant.
10. display device as claimed in claim 8, it is characterized in that, if described processing module is further used for the described photosensitive brightness value of described receiver module reception by entering within default photosensitive brightness range outside the photosensitive brightness range preset, open described first imageing sensor and described second imageing sensor detection current environment brightness, obtain described current environment brightness value, and according to described current environment brightness value adjusting backlight luminance.
11. described display devices as claimed in claim 8, it is characterized in that, described processing module comprises:
Second regulon, for determining that described photosensitive brightness value that described receiver module receives is greater than the higher limit of described default photosensitive brightness range, then based on described photosensitive brightness value, regulates the backlight illumination of described display device;
3rd regulon, for determining that described photosensitive brightness value that described receiver module receives is less than the lower limit of described default photosensitive brightness range, then detect current environment brightness by described first imageing sensor and described second figure image sensor, obtain described current environment brightness value, if described current environment brightness value is less than Second Threshold, then using preset minimum backlight brightness as current backlight brightness.
12. display devices as described in any one of claim 7-11, it is characterized in that, described first imageing sensor is the preposition imageing sensor on described display device, and described second imageing sensor is the rearmounted imageing sensor on described display device.
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| CN201410374560.3A CN105280159B (en) | 2014-07-31 | 2014-07-31 | The backlight adjusting method and its display device of a kind of display device |
| PCT/CN2015/084822 WO2016015587A1 (en) | 2014-07-31 | 2015-07-22 | Backlight adjustment method for display device, display device, computer program product and computer-readable storage medium |
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| WO2016015587A1 (en) | 2016-02-04 |
| CN105280159B (en) | 2017-11-28 |
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