CN105453166A - Method and apparatus for regulating backlight brightness, and electronic device - Google Patents

Method and apparatus for regulating backlight brightness, and electronic device Download PDF

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Publication number
CN105453166A
CN105453166A CN201380078886.5A CN201380078886A CN105453166A CN 105453166 A CN105453166 A CN 105453166A CN 201380078886 A CN201380078886 A CN 201380078886A CN 105453166 A CN105453166 A CN 105453166A
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Prior art keywords
backlight illumination
illumination
ambient light
backlight
value
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CN201380078886.5A
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CN105453166B (en
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杨泓
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Huawei Device Co Ltd
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Huawei Device Co Ltd
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Priority to CN201810770016.9A priority Critical patent/CN108877692B/en
Priority to CN201810770001.2A priority patent/CN108877739B/en
Publication of CN105453166A publication Critical patent/CN105453166A/en
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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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

Provided are a method and an apparatus for regulating a backlight brightness, and an electronic device. The method comprises the following steps: after an ambient light illuminance value is obtained by means of an ambient light sensor, determining a backlight brightness regulation value corresponding to the ambient light illuminance value according to a backlight brightness regulation curve and the ambient light illuminance value, the backlight brightness regulation curve being determined according to a brightness reference value and a correspondence between an ambient light illuminance and a backlight brightness; and regulating a backlight brightness of a display screen of an electronic device according to the backlight regulation value. The method can regulate a backlight brightness of a display screen according to an ambient light illuminance in consideration of power consumption of an electronic device and a visual feeling of eyes of a user.

Description

Method and apparatus for regulating backlight brightness, and electronic device
A kind of method of adjusting backlight luminance, device and technical field of electronic equipment
The present invention relates to electronic technology field, more particularly to a kind of method of adjusting backlight luminance, device and electronic equipment.Background technology
Ambient light sensor has been such as smart mobile phone, tablet personal computer, notebook computer, intelligent television, the standard configuration of multimedia player electronic equipment, its most important One function is exactly the light conditions for perceiving electronic equipment local environment, and inform processor, display backlight brightness is automatically adjusted based on electronic equipment set manufacturer or the mapping curve of the default ambient light of application developer and backlight, so as to reduce the power consumption of product, this is a kind of method for saving power consumption.
In the prior art, the not relatively reasonable scheme that display backlight brightness is adjusted according to ambient light illumination.The content of the invention
The embodiment of the present invention provides a kind of method of adjusting backlight luminance, device and electronic equipment, to adjust the backlight illumination of display screen according to ambient light illumination to take into account powder consumption of electronic equipment and user human visual experience.
The first aspect of the present invention there is provided a kind of method of adjusting backlight luminance, including：After ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and the ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with the ambient lighting angle value, wherein, the backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination；According to the backlight illumination regulated value, the backlight illumination of the display screen of the electronic equipment is adjusted.
With reference in a first aspect, in the first possible implementation, before the acquisition ambient lighting angle value by ambient light sensor, methods described also includes：The luminance reference value is obtained, based on the corresponding relation between the luminance reference value and ambient light illumination and backlight illumination, generation backlight illumination regulation Curve, wherein, the corresponding relation between the ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
With reference to first aspect or the first possible implementation, in second of possible implementation, the corresponding relation between the ambient light illumination and backlight illumination is specifically obtained by following steps：Mapping relations based on human eye brightness and ambient light illumination, determine the sensitivity curve；Based on the sensitivity curve, the corresponding relation between the ambient light illumination and backlight illumination is determined.
With reference to the first possible implementation or second of possible implementation, in the third possible implementation, the sensitivity curve is specifically obtained by below equation：
L I L w Y
S=Shang> 0.008856
Y I Yw ' Yw
Wherein, S is susceptibility of the human eye to brightness, and J is human eye brightness value,；For ambient lighting angle value, Lw is the maximum of human eye brightness, and 1% is the maximum of ambient light illumination, J=- 16
It is described to be based on the sensitivity curve in the 4th kind of possible implementation with reference to second of possible implementation or the third possible implementation, the corresponding relation between the ambient light illumination and backlight illumination is determined, is specially：The inverse of the sensitivity curve is calculated, the corresponding relation between the ambient light illumination and backlight illumination is obtained.
With reference to first aspect and the first possible implementation to any one in the 4th kind of possible implementation, in the 5th kind of possible implementation, it is described that the backlight illumination of the display screen of the electronic equipment is adjusted according to the backlight illumination regulated value, be specially：When the brightness value corresponding to the backlight illumination regulated value is more than the maximum brightness level of the backlight illumination, the backlight illumination of the display screen is adjusted to the brightness value corresponding to maximum brightness level.
Second aspect there is provided a kind of device of adjusting backlight luminance, including：Backlight illumination regulated value determining module, for after ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and the ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with the ambient lighting angle value, wherein, the backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination；Backlight adjustment module, for according to the backlight illumination regulated value, Adjust the backlight illumination of the display screen of the electronic equipment.
With reference to second aspect, in the first possible implementation, the electronic equipment, in addition to：Backlight illumination adjustment curve generation module, for before the electronic equipment obtains ambient lighting angle value by ambient light sensor, obtain the luminance reference value, based on the corresponding relation between the luminance reference value and ambient light illumination and backlight illumination, generate backlight illumination adjustment curve, wherein, the corresponding relation between the ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
With reference to second aspect or the first possible implementation, in second of possible implementation, the corresponding relation between the ambient light illumination and backlight illumination is specifically obtained by following steps：Mapping relations based on human eye brightness and ambient light illumination, determine the sensitivity curve；Based on the sensitivity curve, the corresponding relation between the ambient light illumination and backlight illumination is determined.
With reference to the first possible implementation or second of possible implementation, in the third possible implementation, the sensitivity curve is specifically obtained by below equation：
L I L w Y
S=Shang> 0.008856
Y I Yw ' Yw
Wherein, S is susceptibility of the human eye to brightness, and J is human eye brightness value,；For ambient lighting angle value, Lw is the maximum of human eye brightness, and 1% is the maximum of ambient light illumination, J=1-16
With reference to second aspect and the first possible implementation to any one in the third possible implementation, in the 4th kind of possible implementation, the backlight adjustment module, specifically for：When the brightness value corresponding to the backlight illumination regulated value is more than the maximum brightness level of the backlight illumination, the backlight illumination of the display screen is adjusted to the brightness value corresponding to maximum brightness level.
The third aspect there is provided a kind of electronic equipment, including：Ambient light sensor, the ambient light illumination for gathering electronic equipment local environment；Processor, it is connected with the ambient light sensor, for after ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and the ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with the ambient lighting angle value；According to the backlight illumination regulated value, the backlight illumination of the display screen of the electronic equipment is adjusted, wherein, the backlight illumination adjustment curve is based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination Determine.
With reference to the third aspect, in the first possible implementation, the processor is additionally operable to：Before the electronic equipment obtains ambient lighting angle value by ambient light sensor, obtain the luminance reference value, based on the corresponding relation between the luminance reference value and ambient light illumination and backlight illumination, generate the backlight illumination adjustment curve, wherein, the corresponding relation between the ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
With reference to the third aspect or the first possible implementation, in second of possible implementation, the corresponding relation between the ambient light illumination and backlight illumination is specifically obtained by following steps：Mapping relations based on human eye brightness and ambient light illumination, determine the sensitivity curve；Based on the sensitivity curve, the corresponding relation between the ambient light illumination and backlight illumination is determined.
With reference to the first possible implementation or second of possible implementation, in the third possible implementation, the sensitivity curve is specifically obtained by below equation：
L I L w Y
S=Shang> 0.008856
Y I Yw ' Yw
Wherein, S is susceptibility of the human eye to brightness, and J is human eye brightness value,；For ambient lighting angle value, Lw is the maximum of human eye brightness, and 1% is the maximum of ambient light illumination, J=1-16
With reference to the third aspect and the first possible implementation to any one in the third possible implementation, in the 4th kind of possible implementation, the processor, specifically for：When the brightness value corresponding to the maximum brightness level of brightness of the backlight illumination regulated value more than the display screen back of the body, the backlight illumination of the display screen is adjusted to the brightness value corresponding to the maximum brightness level.The present invention has the beneficial effect that：
Because electronic equipment can be after ambient lighting angle value be obtained by ambient light sensor, according to the backlight illumination adjustment curve based on determined by the corresponding relation between luminance reference value and ambient light illumination and backlight illumination and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, and according to backlight illumination regulated value, adjust the backlight illumination of the display screen of electronic equipment, so, electronic equipment The backlight illumination of display screen.Brief description of the drawings
Fig. 1 be one embodiment of the invention in adjusting backlight luminance method flow diagram；
Fig. 2 be one embodiment of the invention in adjusting backlight luminance device functional block diagram;
Fig. 3 be one embodiment of the invention in electronic equipment structural representation.Embodiment
The embodiment of the present invention provides a kind of method of adjusting backlight luminance, device and electronic equipment, to adjust the backlight illumination of display screen according to ambient light illumination for taking into account powder consumption of electronic equipment and user human visual experience, its solution general thought is as follows：
Electronic equipment is after ambient lighting angle value is obtained by ambient light sensor, according to the backlight illumination adjustment curve based on determined by the corresponding relation between luminance reference value and ambient light illumination and backlight illumination and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, and according to backlight illumination regulated value, adjust the backlight illumination of the display screen of electronic equipment, so, electronic equipment can just take into account powder consumption of electronic equipment and user human visual experience, to adjust the backlight illumination of display screen according to ambient light illumination, and Consumer's Experience can be improved.
To the main realization principle of the embodiment of the present invention, specific implementation process and its beneficial effect that should be able to be reached is explained in detail with reference to Figure of description.
The present embodiment provides a kind of method of adjusting backlight luminance, applied on an electronic equipment, the electronic equipment can be smart mobile phone, tablet personal computer, notebook computer, multimedia player etc., these electronic equipments include a display screen, the display screen can be common liquid crystals display screen, can also be touch display screen, or flexible screen, the application is not specifically limited.Further, an ambient light sensor is additionally provided with the electronic equipment, the ambient light illumination for detecting electronic equipment local environment.
Specific operating procedure as shown in figure 1, including：
S101 :After ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, wherein, Backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination；
S102:According to backlight illumination regulated value, the backlight illumination of the display screen of electronic equipment is adjusted.
In the present embodiment, above-mentioned backlight illumination adjustment curve is determined before S101, then, method can also include：Obtain luminance reference value, based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination, backlight illumination adjustment curve is generated, wherein, the corresponding relation between ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
Wherein, the luminance reference value that electronic equipment is obtained can for electronic equipment user in actual use, just the blunt ambient light illumination according to current environment is set, such as, user or electronic equipment call a luminance reference value to obtain interface, now, and the ambient light illumination of environment where electronic equipment detects active user is h lux, user can set it to think the backlight brightness values of most comfortable display screen under the present circumstances, such as 11 in the luminance reference value obtains interface.Preferably, the setting of the luminance reference value only can automatically initiate inquiry when user's first time is using electronic equipment by electronic equipment, afterwards, and user can pass through carries out selection change manually in the setting of the system of electronic equipment.
Next, when electronic equipment obtains above-mentioned luminance reference value, electronic equipment is according to the corresponding relation being preset between ambient light illumination therein and backlight illumination, backlight illumination adjustment curve of the generation one for the active user of electronic equipment.
It should be noted that in actual applications, the ambient light illumination that ambient light sensor is measured can be in the color spaces of CIE 1931（The color space standards as defined in international lighting association in 1931）Under brightness Y, and the backlight illumination that human eye is perceived is closer to CIE Luv color spaces（By international lighting association（CIE) in color space standards as defined in 1976）In brightness L, then, can use Y characterize ambient lighting angle value, L characterize human eye brightness value, as shown in Equation 1, the mapping relations between Y and L are：
1 I 3
= 1 1 6 - 1 6 —— > 0.008856
Yw, Yw Wherein, it is the maximum of environmental light brightness, that is, ambient light sensor is capable of the maximum of measured value.
In order that under different ambient light illuminations, the backlight illumination for the display screen that user is perceived does not change, the manufacturer of electronic equipment or the developer of application program are according to above-mentioned formula（1) mapping relations of human eye brightness and environmental light brightness shown in, obtain sensitivity curve of the human eye to brightness, i.e. formula（2 ).
Wherein, S be human eye to the susceptibility of brightness, Jw is the maximum of human eye brightness, that is, L maximum, in actual applications, Jw can take 100 nits.
With reference to formula（1) and（2), it can obtain：
Further, based on above-mentioned sensitivity curve, the corresponding relation between environmental light brightness and backlight illumination is determined, specifically, calculating the inverse of sensitivity curve, the corresponding relation between environmental light brightness and backlight illumination, i.e. formula is obtained（3 ):
L e =
Wherein, Je is the backlight brightness values of display screen.
Further, by the corresponding ambient lighting angle value of luminance reference value, such as luminance reference value is nits, its correspondence ambient lighting angle value/z lux, and formula is brought into as Y value（3), the backlight illumination Je of the display screen of acquisition now value, such as nits, then, it becomes possible to generate above-mentioned backlight illumination adjustment curve Je', i.e.,：
" normalization " processing is namely carried out to curve Je, the coordinate system that longitudinal axis span is 0 ~ 1 coordinate system that longitudinal axis span is 0 ~ 255 is converted into, to obtain curve Le'.
It should be noted that, above-mentioned backlight adjustment curve is after generation, it can store in the electronic device, directly invoked during for follow-up using, without generating the curve online again, it is just online again to generate backlight adjustment curve when user changes numeral or the initialization electronic equipment of luminance reference value.
First, S101 is performed:After ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value.
Specifically, after electronic equipment obtains backlight illumination adjustment curve Je', electronic equipment at least can be especially by following two embodiments according to backlight illumination adjustment curve and ambient lighting angle value, to determine backlight illumination regulated value corresponding with ambient lighting angle value.
The first embodiment, ambient light sensor can at regular intervals, and such as 5s, 30s, lmin gather an ambient lighting angle value, obtains ambient lighting angle value, as/, then, according to backlight illumination adjustment curve Je', ambient lighting angle value/corresponding backlight illumination regulated value with collecting will be obtained, such as m, namely incite somebody to action/bring curve Je' into, it is possible to obtain Je'=m, i.e. backlight illumination regulated value.
Second of embodiment, ambient light sensor each a period of time, such as 5s, 30s, lmin gather an ambient lighting angle value, obtain ambient lighting angle value, as/, then, electronic equipment judges whether the ambient light illumination of electronic equipment local environment changes according to these values, in this way, then ambient lighting angle value/corresponding backlight illumination regulated value with collecting will be obtained according to backlight illumination adjustment curve Le', such as m, namely incite somebody to action/bring curve Je' into, it is possible to obtain Je'=m, i.e. backlight illumination regulated value；If it is not, then without any action.
Certainly, in specific implementation process, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value Methods be not limited only to above two embodiment, the application is not specifically limited.
Next, performing S102, i.e.,：According to backlight illumination regulated value, the backlight illumination of the display screen of electronic equipment is adjusted.
In specific implementation process, S102 can be：The backlight illumination regulated value that the backlight illumination of the display screen of electronic equipment is adjusted to be obtained by S101.
Certainly, in the present embodiment, by the maximum brightness level that binary code can be recognized is 255, so, when above-mentioned backlight illumination regulated value be more than display screen backlight illumination maximum brightness level corresponding to brightness value corresponding to brightness value when, S102 can be by the backlight illumination of display screen be adjusted to maximum brightness level corresponding to brightness value corresponding to brightness value.
Such scheme is illustrated with instantiation below.
So that electronic equipment is tablet personal computer as an example, formula can be prestored before it dispatches from the factory（And formula 3)（4), when user uses the tablet personal computer for the first time, tablet personal computer can show that a luminance reference value sets interface, the current environment illuminance that current environment light sensors are arrived is shown on the interface, such as 400 lux, user can set the backlight illumination that the display screen that the most comfortable is thought under this ambient light is set on interface in luminance reference value, if that user's selection is 50 nits, the maximum range of ambient light sensor
%=10000lux, then, first, the lux of current environment illuminance Y=400 during luminance reference value is set according to user, passes through formula（3) nits of Je=0.169 is obtained, then, by=50 nits, the nits of J=0.169 brings formula into（4), in this way, it is possible to try to achieve the backlight illumination adjustment curve for the user, i.e. formula (4):
S101 is performed, ambient light sensor can gather the ambient lighting angle value of a tablet personal computer local environment every one minute, and bring the value into above-mentioned formula（4) backlight illumination regulated value, is just resulted in.Further, S102 is performed, i.e., the backlight illumination of display screen is adjusted to the backlight illumination regulated value. Certainly, in another embodiment, every the ambient lighting angle value of the tablet personal computer local environment of collection in one minute, and judge whether the ambient lighting angle value is consistent with the ambient lighting angle value of last time collection, or in rational domain of walker, in this way, then it is assumed that the ambient light of tablet personal computer local environment does not change, so, avoid the need for performing S102;If not, think that the ambient light of tablet personal computer local environment changes, now, then the ambient lighting angle value collected is brought into above-mentioned formula（4) backlight illumination regulated value, is just resulted in.Further, S102 is performed, i.e., the backlight illumination of display screen is adjusted to the backlight illumination regulated value.
Further, when bringing ambient lighting angle value into above-mentioned formula（4) and obtain backlight illumination regulated value be 800 nits, more than display screen backlight illumination maximum brightness level 255 corresponding to 500 nits of brightness value when, the backlight illumination of display screen can be adjusted to 500 nits.
Seen from the above description, because electronic equipment can be after ambient lighting angle value be obtained by ambient light sensor, according to the backlight illumination adjustment curve based on determined by the corresponding relation between luminance reference value and ambient light illumination and backlight illumination and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, and according to backlight illumination regulated value, adjust the backlight illumination of the display screen of electronic equipment, so, electronic equipment can just take into account powder consumption of electronic equipment and user human visual experience, to adjust the backlight illumination of display screen according to ambient light illumination, Consumer's Experience can further be improved.
Based on same inventive concept, the second aspect of the present invention there is provided a kind of device of adjusting backlight luminance, as shown in Fig. 2 including：Backlight illumination regulated value determining module 10, for after ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, wherein, backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination；Backlight adjustment module 20, for according to backlight illumination regulated value, adjusting the backlight illumination of the display screen of electronic equipment.
In the present embodiment, said apparatus also includes：Backlight illumination adjustment curve generation module 30, for obtaining luminance reference value, based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination, generate backlight illumination adjustment curve, wherein, the corresponding relation between ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
Specifically, between ambient light illumination and backlight illumination corresponding relation is specifically obtained by following steps： Mapping relations based on human eye brightness and ambient light illumination, determine sensitivity curve；Based on sensitivity curve, the corresponding relation between ambient light illumination and backlight illumination is determined.
In actual applications, the ambient light illumination that ambient light sensor is measured is the brightness Y under the color spaces of CIE 1931, and the backlight illumination that human eye is perceived is closer to the brightness L in CIE Luv color spaces, so, just ambient lighting angle value is characterized with Y, L characterizes human eye brightness value, the mapping relations such as formula between Y and L（1) shown in.
So, in order that under different ambient light illuminations, the backlight illumination for the display screen that user is perceived does not change, the manufacturer of electronic equipment or the developer of application program are according to above-mentioned formula（1) mapping relations of human eye brightness and environmental light brightness shown in, obtain sensitivity curve of the human eye to brightness, i.e. formula（2), in actual applications, Jw100 nits can be taken.
Optionally, with reference to formula（1) and（2), it can obtain：
Further, based on above-mentioned sensitivity curve, the corresponding relation between environmental light brightness and backlight illumination is determined, specifically, calculating the inverse of sensitivity curve, the corresponding relation between environmental light brightness and backlight illumination, i.e. formula is obtained（3 ).
Further, backlight illumination adjustment curve generation module 30, by the corresponding ambient lighting angle value of luminance reference value, such as luminance reference value is nits, and its correspondence ambient lighting angle value z lux bring formula into as Y value（3), the backlight illumination Je of the display screen of acquisition now value, such as nits, then, it becomes possible to which generation refer to formula for the backlight illumination adjustment curve of electronic equipment active user（4), that is, to by " normalization " processing is carried out, curve is converted into the coordinate system that longitudinal axis span is 0 ~ 255 by the coordinate system that longitudinal axis span is 0 ~ 1, to obtain backlight illumination adjustment curve.
In the present embodiment, above-mentioned luminance reference value can for electronic equipment user in actual use, set according to the ambient light illumination of current environment, such as, electronic equipment detects ring where active user The ambient light illumination in border is Mux, and one luminance reference value of ejection obtains interface, so that user sets it to think the backlight brightness values of most comfortable display screen under the present circumstances, such as 11.
Preferably, the setting of the luminance reference value only automatically initiates inquiry when user's first time is using electronic equipment by electronic equipment, afterwards, and user can pass through carries out selection change manually in the setting of the system of electronic equipment.
Further, backlight illumination regulated value determining module 10, after electronic equipment obtains ambient lighting angle value by ambient light sensor, according to the backlight illumination adjustment curve and ambient lighting angle value determined by backlight illumination adjustment curve generation module 30, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value.
Wherein, above-mentioned ambient lighting angle value can be acquired by ambient light sensor by least two embodiments described in said one or multiple embodiments, herein no longer --- repeat.
Further, backlight adjustment module 20, for according to the backlight illumination regulated value determined by backlight illumination regulated value determining module 20, adjusting the backlight illumination of the display screen of electronic equipment.
Specifically, the backlight illumination regulated value that the backlight illumination of the display screen of electronic equipment is adjusted to be determined by backlight illumination regulated value determining module 10 by backlight adjustment module 20.
In another embodiment, backlight adjustment module 20, is specifically additionally operable to：When backlight illumination regulated value be more than display screen backlight illumination maximum brightness level corresponding to brightness value when, by the backlight illumination of display screen be adjusted to maximum brightness level corresponding to brightness value.
In various embodiments above, in the case where not conflicting, implementation can be mutually combined.
Various change mode and instantiation in the method for adjusting backlight luminance in the embodiment of earlier figures 1 are equally applicable to the terminal of the present embodiment, pass through the detailed description of the foregoing method to adjusting backlight luminance, those skilled in the art are clear that the implementation of the device in the present embodiment, so it is succinct for specification, it will not be described in detail herein.Based on same inventive concept, the third aspect of the present invention can be smart mobile phone, tablet personal computer, notebook computer, multimedia player etc. there is provided a kind of electronic equipment, the electronic equipment.
Fig. 3 is illustrated that the structural representation of electronic equipment of the embodiment of the present invention.
Fig. 3 is refer to, the electronic equipment includes：Ambient light sensor 301, for gathering electronic equipment institute Locate the ambient light illumination of environment；Processor 303, it is connected with ambient light sensor 301, after ambient lighting angle value is obtained by ambient light sensor in electronic equipment, according to backlight illumination adjustment curve and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, then, according to backlight illumination regulated value, adjust the backlight illumination of the display screen of electronic equipment, wherein, corresponding relations of the backlight illumination adjustment curve ^^ between luminance reference value and ambient light illumination and backlight illumination is determined.
Wherein, the electronic equipment can also include memory 302, the mapping table for the corresponding relation between storage environment illuminance and backlight illumination, that is, ambient light illumination and backlight illumination.
In the present embodiment, memory 302, it can be the internal memory of terminal, store the corresponding relation between electronic equipment set manufacturer and the default ambient light illumination of application developer and backlight illumination, the ambient lighting angle value gathered by ambient light sensor can also be stored, so, processor 303 can just read the corresponding relation and ambient lighting angle value between above-mentioned ambient light illumination and backlight illumination from memory 302.Memory 302 can also be one of NVRAM nonvolatile storages, DRAM dynamic RAMs, SRAM SRAMs, Flash flash memories etc..
Wherein, in figure 3, processor 303 can also with such as I/O interfaces 304, display screen 305, WiFi module 306, radio-frequency antenna 307 etc it is various other be electrically connected to together with, these are all known in the field, therefore, no longer it is described further by the application.
In actual applications, display screen 305 can be common liquid crystals display screen, can also be touch display screen, or flexible screen, the application is not specifically limited.
Further, processor 303, are additionally operable to：Before ambient lighting angle value is obtained by ambient light sensor, obtain luminance reference value, based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination, generate backlight illumination adjustment curve, wherein, the corresponding relation between ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
In the present embodiment, above-mentioned backlight adjustment curve is after generation, it can store in the memory 302, directly invoked during for follow-up using, without generating the curve online again, it is just online again to generate backlight adjustment curve when user changes numeral or the initialization electronic equipment of luminance reference value.
Further, between ambient light illumination and backlight illumination corresponding relation is specifically obtained by following steps：Mapping relations based on human eye brightness and ambient light illumination, determine sensitivity curve；Based on sensitivity curve, Determine the corresponding relation between ambient light illumination and backlight illumination.
In actual applications, the ambient light illumination that ambient light sensor is measured is the brightness Y under the color spaces of CIE 1931, and the backlight illumination that human eye is perceived is closer to the brightness L in CIE Luv color spaces, so, just ambient lighting angle value is characterized with Y, L characterizes human eye brightness value, and the mapping relations between Y and L are just as shown in Equation 1.
So, in order that under different ambient light illuminations, the backlight illumination for the display screen that user is perceived does not change, the manufacturer of electronic equipment or the developer of application program are according to above-mentioned formula（1) mapping relations of human eye brightness and environmental light brightness shown in, obtain sensitivity curve of the human eye to brightness, i.e. formula（2) in actual applications, Jw100 nits can be taken.
Optionally, with reference to formula（1) and（2), it can obtain：
Further, based on above-mentioned sensitivity curve, the corresponding relation between environmental light brightness and backlight illumination is determined, specifically, calculating the inverse of sensitivity curve, the corresponding relation between environmental light brightness and backlight illumination, i.e. formula is obtained（3 ).
By the corresponding ambient lighting angle value of luminance reference value, such as luminance reference value is nits, its correspondence ambient lighting angle valueLux, formula is brought into as Y value（3), the backlight illumination Je of acquisition now value, such as nits, then, it becomes possible to generate above-mentioned backlight illumination adjustment curve, refer to formula（4), that is, to by " normalization " processing is carried out, curve is converted into the coordinate system that longitudinal axis span is 0 ~ 255 by the coordinate system that longitudinal axis span is 0 ~ 1, to obtain curve Le'.
Next, processor 303, after electronic equipment obtains ambient lighting angle value by ambient light sensor 301, according to backlight illumination adjustment curve and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value.
Specifically, after electronic equipment obtains backlight illumination adjustment curve Je', electronic equipment is at least Can be especially by least two embodiments described in said one or multiple embodiments according to backlight illumination adjustment curve and ambient lighting angle value, to determine backlight illumination regulated value corresponding with ambient lighting angle value, herein no longer --- repeat.
Further, processor 303, also particularly useful for：According to backlight illumination regulated value, the backlight illumination of the display screen of electronic equipment is adjusted.That is, the backlight illumination of the display screen of electronic equipment is adjusted into the above-mentioned backlight illumination regulated value determined by processor 303.
Certainly, in the present embodiment, when backlight illumination regulated value be more than display screen backlight illumination maximum brightness level corresponding to brightness value when, by the backlight illumination of display screen be adjusted to maximum brightness level corresponding to brightness value.
In various embodiments above, in the case where not conflicting, implementation can be mutually combined.
Various change mode and instantiation in the method for adjusting backlight luminance in the embodiment of earlier figures 1 are equally applicable to the terminal of the present embodiment, pass through the detailed description of the foregoing method to adjusting backlight luminance, those skilled in the art are clear that the implementation of the electronic equipment in the present embodiment, so it is succinct for specification, it will not be described in detail herein.
The present invention has the beneficial effect that：
Because electronic equipment can be after ambient lighting angle value be obtained by ambient light sensor, according to the backlight illumination adjustment curve based on determined by the corresponding relation between luminance reference value and ambient light illumination and backlight illumination and ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with ambient lighting angle value, and according to backlight illumination regulated value, adjust the backlight illumination of the display screen of electronic equipment, so, electronic equipment can just take into account powder consumption of electronic equipment and user human visual experience, to adjust the backlight illumination of display screen according to ambient light illumination, improve Consumer's Experience.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program product.Therefore, the form of the embodiment in terms of the present invention can use complete hardware embodiment or combine software and hardware.Moreover, the present invention can be used in one or more computer-usable storage mediums for wherein including computer usable program code（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The form of the computer program product of upper implementation.
The present invention is with reference to method according to embodiments of the present invention, equipment（System）And computer program production The flow chart and/or block diagram of product is described.It should be understood that can by the flow in each flow and/or square frame and flow chart and/or block diagram in computer program instructions implementation process figure and/or block diagram and/or square frame combination.These computer program instructions can be provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices to produce a machine so that produce the device for being used for realizing the function of specifying in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames by the instruction of the computing device of computer or other programmable data processing devices.
These computer program instructions may be alternatively stored in the computer-readable memory that computer or other programmable data processing devices can be guided to work in a specific way, so that the instruction being stored in the computer-readable memory, which is produced, includes the manufacture of command device, the command device realizes the function of being specified in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices, so that series of operation steps is performed on computer or other programmable devices to produce computer implemented processing, so that the instruction performed on computer or other programmable devices provides the step of being used to realize the function of specifying in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames.The spirit and scope of invention.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising including these changes and modification.

Claims (1)

  1. Claim
    1st, a kind of method of adjusting backlight luminance, it is characterised in that including：After ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and the ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with the ambient lighting angle value, wherein, the backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination；According to the backlight illumination regulated value, the backlight illumination of the display screen of the electronic equipment is adjusted.
    2nd, the method as described in claim 1, it is characterised in that before the acquisition ambient lighting angle value by ambient light sensor, methods described also includes：Obtain the luminance reference value, based on the corresponding relation between the luminance reference value and ambient light illumination and backlight illumination, generate backlight illumination adjustment curve, wherein, the corresponding relation between the ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
    3rd, method as claimed in claim 1 or 2, it is characterised in that the corresponding relation between the ambient light illumination and backlight illumination is obtained by following steps：
    Mapping relations based on human eye brightness and ambient light illumination, determine the sensitivity curve；Based on the sensitivity curve, the corresponding relation between the ambient light illumination and backlight illumination is determined.
    4th, method as claimed in claim 2 or claim 3, it is characterised in that the sensitivity curve is obtained by below equation：
    L I L w Y
    S=Shang> 0.008856
    Y I Yw ' Yw
    Wherein, S is susceptibility of the human eye to brightness, and J is human eye brightness value,；For ambient lighting angle value, Lw is the maximum of human eye brightness, and 1% is the maximum of ambient light illumination, -16
    5th, the method as described in claim 3 or 4, it is characterised in that described to be based on the sensitivity curve, determines the corresponding relation between the ambient light illumination and backlight illumination, is specially：The inverse of the sensitivity curve is calculated, the corresponding relation between the ambient light illumination and backlight illumination is obtained.
    6th, the method as described in claim any one of 1-5, it is characterised in that described according to the backlight Brightness regulation value, adjusts the backlight illumination of the display screen of the electronic equipment, is specially：When the brightness value corresponding to the backlight illumination regulated value is more than the maximum brightness level of the backlight illumination, the backlight illumination of the display screen is adjusted to the brightness value corresponding to maximum brightness level.
    7th, a kind of device of adjusting backlight luminance, it is characterised in that including：
    Backlight illumination regulated value determining module, for after ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and the ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with the ambient lighting angle value, wherein, the backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination；
    Backlight adjustment module, for according to the backlight illumination regulated value, adjusting the backlight illumination of the display screen of the electronic equipment.
    8th, device as claimed in claim 7, it is characterised in that the electronic equipment, in addition to：Backlight illumination adjustment curve generation module, for before the electronic equipment obtains ambient lighting angle value by ambient light sensor, obtain the luminance reference value, based on the corresponding relation between the luminance reference value and ambient light illumination and backlight illumination, generate backlight illumination adjustment curve, wherein, the corresponding relation between the ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
    9th, device as claimed in claim 7 or 8, it is characterised in that the corresponding relation between the ambient light illumination and backlight illumination is specifically obtained by following steps：Mapping relations based on human eye brightness and ambient light illumination, determine the sensitivity curve；Based on the sensitivity curve, the corresponding relation between the ambient light illumination and backlight illumination is determined.
    10th, device as claimed in claim 8 or 9, it is characterised in that the sensitivity curve is specifically obtained by below equation：
    L I L w Y
    S=Shang> 0.008856
    Y I Yw ' Yw
    Wherein, S is susceptibility of the human eye to brightness, and J is human eye brightness value,；For ambient lighting angle value, Lw is the maximum of human eye brightness, and 1% is the maximum of ambient light illumination, J=116 | two I -16
    Yw 11st, the device as described in claim any one of 7-10, it is characterised in that the backlight adjustment module, specifically for：When the brightness value corresponding to the backlight illumination regulated value is more than the maximum brightness level of the backlight illumination, the backlight illumination of the display screen is adjusted to the brightness value corresponding to maximum brightness level.
    12nd, a kind of electronic equipment, it is characterised in that including：Ambient light sensor, the ambient light illumination for gathering electronic equipment local environment；
    Processor, it is connected with the ambient light sensor, for after ambient lighting angle value is obtained by ambient light sensor, according to backlight illumination adjustment curve and the ambient lighting angle value, it is determined that backlight illumination regulated value corresponding with the ambient lighting angle value；According to the backlight illumination regulated value, the backlight illumination of the display screen of the electronic equipment is adjusted, wherein, the backlight illumination adjustment curve is determined based on the corresponding relation between luminance reference value and ambient light illumination and backlight illumination.
    13rd, electronic equipment as claimed in claim 12, it is characterised in that the processor, is additionally operable to：Before the electronic equipment obtains ambient lighting angle value by ambient light sensor, obtain the luminance reference value, based on the corresponding relation between the luminance reference value and ambient light illumination and backlight illumination, generate the backlight illumination adjustment curve, wherein, the corresponding relation between the ambient light illumination and backlight illumination is that the sensitivity curve of brightness is determined according to human eye.
    14th, the electronic equipment as described in claim 12 or 13, it is characterised in that the corresponding relation between the ambient light illumination and backlight illumination is specifically obtained by following steps：
    Mapping relations based on human eye brightness and ambient light illumination, determine the sensitivity curve；Based on the sensitivity curve, the corresponding relation between the ambient light illumination and backlight illumination is determined.
    15th, the electronic equipment as described in claim 13 or 14, it is characterised in that the sensitivity curve is specifically obtained by below equation：
    L I L w Y
    S=Shang> 0.008856
    Y I Yw ' Yw
    Wherein, S is susceptibility of the human eye to brightness, and J is human eye brightness value,；For ambient lighting angle value, Lw is the maximum of human eye brightness, and 1% is the maximum of ambient light illumination, J=116 | two I -16
    Yw 16th, the electronic equipment as described in claim any one of 12-15, it is characterised in that the processor, is specifically additionally operable to：When the brightness value corresponding to the backlight illumination regulated value is more than the maximum brightness level of the backlight illumination, the backlight illumination of the display screen is adjusted to the brightness value corresponding to maximum brightness level.
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