CN104601893A - Current setting device of LED (Light Emitting Diode) flashlight, method and flash photographing device - Google Patents
Current setting device of LED (Light Emitting Diode) flashlight, method and flash photographing device Download PDFInfo
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Abstract
The invention relates to an LED (Light Emitting Diode) fill-in light flashlight technique, particularly relates to a current setting device of an LED flashlight, a method and a flash photographing device, and solves the problems that the background exposition of the LED flashlight is not enough when the background is darker. The current setting device of LED flashlight provided by the invention comprises a parameter acquiring module (401) and a processing module (402), wherein the parameter acquiring module (401) is used for acquiring a VCM (Voice Coil Motor) code after the flash photographing device where the LED flashlight is focuses on automatically; the processing module (402) is used for determining a total output current value of the LED flashlight according to the VCM code. Since the VCM code can reflect the far and near distances of a shot object, the current setting device of the LED flashlight can realize that the total output current value of the LED flashlight can be set according to the far and near distances of the shot object, therefore the exposure time and ISO cannot be adjusted excessively, the total output current value of the fixed LED flashlight can be prevented, the exposure time can be shortened or the problem that the insufficient background exposure is caused by the ISO can be solved.
Description
Technical field
The present invention relates to light-emitting diode (Light Emitting Diode, LED) light filling shooting technology, particularly relate to a kind of LED electric current of flash lamp setting device and method, flash photographing device.
Background technology
LED photoflash lamp be installed on mobile phone, panel computer, etc. in equipment, for the light filling when these camera installations are taken pictures.At present, LED photoflash lamp has the polytype such as single LED photoflash lamp, many LED photoflash lamp, monochromatic temperature LED photoflash lamp, variable color-temperature LED photoflash lamp.Wherein, only comprise a LED lamp in single LED photoflash lamp, many LED photoflash lamp comprises plurality of LEDs lamp.
LED is driven luminous by LED drive integrated circult (Integrated Circuit, IC), LED drive integrated circult controls the switch, output current size, current duration etc. of LED.For single LED photoflash lamp, LED drive IC arranges the electric current of a LED in this photoflash lamp, and namely the total output current of photoflash lamp, controls its luminous intensity; For many LED photoflash lamp, LED drive IC arranges the electric current of each LED in this photoflash lamp respectively, and the electric current sum of each LED is the total output current of photoflash lamp.For variable color-temperature LED photoflash lamp, the colour temperature of each LED is different, and LED drive IC arranges electric current by each LED etc. being respectively different-colour, can realize the colour temperature regulating photoflash lamp.
At present, when LED light filling is taken pictures, in automatic exposure process, usually there are preflashing and strong sudden strain of a muscle two steps.Dodge in step strong, no matter be single LED photoflash lamp or many LED photoflash lamp, the total output current of photoflash lamp is fixing.Photometric system in equipment is ensured by light-metering part normal exposure by preflashing.The focus of taking during shooting is usually located at subject.Because subject distance camera is nearer during preflashing, the reverberation produced is comparatively strong, is therefore flashing by force in journey, normal in order to ensure subject exposure, under the prerequisite that total output current of photoflash lamp is fixing, usually to shorten the time for exposure or reduce photosensitivity (ISO).If background is comparatively dark, then background can be caused under-exposed.
Summary of the invention
The embodiment of the present invention provides a kind of LED electric current of flash lamp setting device and method, flash photographing device, in order to solve LED photoflash lamp to when background is darker, the problem of background under-exposure.
First aspect, the embodiment of the present invention provides a kind of LED electric current of flash lamp setting device, comprising:
Parameter acquisition module, for the voice coil motor VCM code obtained after obtaining the flash photographing device auto-focusing at LED photoflash lamp place, the described VCM code that described parameter acquisition module obtains is relevant to the distance between described flash photographing device and subject;
Processing module, the VCM code for obtaining according to described parameter acquisition module determines the output total current value of described LED photoflash lamp, and the output total current value of the described LED photoflash lamp that described processing module is determined is luminous for controlling described LED photoflash lamp.
In conjunction with first aspect, in the implementation that the first is possible,
Described processing module also for: determine the output total current value of described LED photoflash lamp at the VCM code obtained according to described parameter acquisition module before, demarcate the corresponding relation of the output total current value that VCM code and described LED photoflash lamp need as follows:
For effective each of focusing interval N number of affecting distance and comprise of described LED photoflash lamp, test the output total current value that described LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the described LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to described first corresponding relation and described second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and described LED photoflash lamp need;
Described processing module, specifically for the corresponding relation of the output total current value needed according to the described VCM code determined and described LED photoflash lamp, determines the output total current value of the described LED photoflash lamp of the VCM code correspondence obtained.
In conjunction with the first possible implementation of first aspect or first aspect, in the implementation that the second is possible,
Described parameter acquisition module also for: acquisition described VCM code before, obtain ambient brightness value during described flash photographing device preview;
Described processing module specifically for:
The described VCM code obtained according to described parameter acquisition module and described ambient brightness value, determine the output total current value of described LED photoflash lamp.
In conjunction with the first possible implementation of first aspect, first aspect or the possible implementation of the second, in the implementation that the third is possible, described output total current value is that described LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, if described output total current value is described LED photoflash lamp flashing by force the output total current value in journey, and described LED photoflash lamp comprises the LED of multiple different-colour, then
Described parameter acquisition module also for: acquisition described VCM code before, obtain Automatic white balance AWB yield value during described flash photographing device preview;
Described processing module also for: after the VCM code obtained according to described parameter acquisition module determines the output total current value of described LED photoflash lamp, according to the AWB yield value that described parameter acquisition module obtains, and the output total current value determined, determine the current value of each LED that described LED photoflash lamp comprises.
Second aspect, the embodiment of the present invention provides a kind of flash photographing device, comprise: LED photoflash lamp, the LED drive integrated circult IC, the camera that are connected with described LED photoflash lamp, and the LED electric current of flash lamp setting device be connected with described camera and described LED drive IC;
Described LED electric current of flash lamp setting device, after controlling described camera auto-focusing, obtains voice coil motor VCM code; The output total current value of LED photoflash lamp is determined according to the VCM code obtained; The output total current value of the LED photoflash lamp determined is issued described LED drive IC;
Described LED drive integrated circult IC, for the output total current value of the LED photoflash lamp according to described LED electric current of flash lamp setting device transmission, controls described LED photoflash lamp luminous.
In conjunction with second aspect, in the implementation that the first is possible,
Described LED electric current of flash lamp setting device also for: before determining the output total current value of LED photoflash lamp according to the VCM code obtained, demarcate the corresponding relation of the output total current value that VCM code and described LED photoflash lamp need as follows:
For effective each of focusing interval N number of affecting distance and comprise of described LED photoflash lamp, test the output total current value that described LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the described LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to described first corresponding relation and described second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and described LED photoflash lamp need;
Described LED electric current of flash lamp setting device, specifically for the corresponding relation of the output total current value needed according to the described VCM code determined and described LED photoflash lamp, determines the output total current value of the described LED photoflash lamp of the VCM code correspondence obtained.
In conjunction with the first possible implementation of second aspect or second aspect, in the implementation that the second is possible,
Described LED electric current of flash lamp setting device also for: before the described VCM code of acquisition, control described camera and carry out preview, and ambient brightness value when obtaining preview;
Described LED electric current of flash lamp setting device specifically for: according to obtain described VCM code and described ambient brightness value, determine the output total current value of described LED photoflash lamp.
In conjunction with the first possible implementation of second aspect, second aspect or the possible implementation of the second, in the implementation that the third is possible, described output total current value is that described LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation, if described output total current value is described LED photoflash lamp flashing by force the output total current value in journey, and described LED photoflash lamp comprises the LED of multiple different-colour, then
Described LED electric current of flash lamp setting device also for: before the described VCM code of acquisition, control described camera and carry out preview, and Automatic white balance AWB yield value when obtaining described flash photographing device preview;
After determining the output total current value of LED photoflash lamp according to the VCM code obtained, according to the AWB yield value obtained, and the output total current value determined, determine the current value of each LED that described LED photoflash lamp comprises, the current value of each LED comprised by the described LED photoflash lamp determined issues described LED drive IC;
Described LED drive IC, also for the current value of each LED that the described LED photoflash lamp sent according to described LED electric current of flash lamp setting device comprises, controls each LED that described LED photoflash lamp comprises luminous respectively.
The third aspect, the embodiment of the present invention provides a kind of LED electric current of flash lamp method to set up, comprising:
The voice coil motor VCM code obtained after obtaining flash photographing device auto-focusing, the described VCM code of acquisition is relevant to the distance between described flash photographing device and subject;
Determine the output total current value of the LED photoflash lamp of described flash photographing device according to the VCM code obtained, the output total current value of the described LED photoflash lamp determined is luminous for controlling described LED photoflash lamp.
In conjunction with the third aspect, in the implementation that the first is possible,
Before determining the output total current value of the LED photoflash lamp of described flash photographing device according to the VCM code obtained, also comprise: the corresponding relation demarcating the output total current value of VCM code and described LED photoflash lamp needs as follows: for effective each of focusing interval N number of affecting distance and comprise of described LED photoflash lamp, test the output total current value that described LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the described LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to described first corresponding relation and described second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and described LED photoflash lamp need;
Determine the output total current value of LED photoflash lamp according to the VCM code obtained, comprising:
The corresponding relation of the output total current value needed according to the described VCM code determined and described LED photoflash lamp, determines the output total current value of the described LED photoflash lamp of the VCM code correspondence obtained.
In conjunction with the first possible implementation of the third aspect or the third aspect, in the implementation that the second is possible,
Before the described VCM code of acquisition, also comprise: obtain ambient brightness value during described flash photographing device preview;
The described VCM code according to obtaining determines the output total current value of the LED photoflash lamp of described flash photographing device, comprising:
According to the described VCM code obtained and described ambient brightness value, determine the output total current value of described LED photoflash lamp.
In conjunction with the first possible implementation of the third aspect, the third aspect or the possible implementation of the second, in the implementation that the third is possible, described output total current value is that described LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
In conjunction with the third possible implementation of the third aspect, in the 4th kind of possible implementation, if described output total current value is described LED photoflash lamp flashing by force the output total current value in journey, and described LED photoflash lamp comprises the LED of multiple different-colour, then
Before the described VCM code of acquisition, also comprise: obtain Automatic white balance AWB yield value during described flash photographing device preview;
After determining the output total current value of the LED photoflash lamp of described flash photographing device according to the VCM code obtained, also comprise:
According to the AWB yield value obtained, and the output total current value determined, determine the current value of each LED that described LED photoflash lamp comprises.
To sum up, embodiments provide a kind of LED electric current of flash lamp setting device and method, flash photographing device, wherein, because VCM code can reflect the distance of subject, therefore the embodiment of the present invention can realize this arranges LED photoflash lamp output total current value according to the distance of subject, so just without the need to excessively adjusting time for exposure and ISO, thus when avoiding the output total current value adopting fixing LED photoflash lamp, shortening time for exposure or reduction ISO cause the problem of background under-exposure.
Accompanying drawing explanation
The structural representation of the flash photographing device that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the method flow diagram of the corresponding relation of the output total current value that demarcation VCM code and LED photoflash lamp need;
Fig. 3 is the flow chart of taking pictures of the embodiment of the present invention one;
The structural representation of the LED electric current of flash lamp setting device that Fig. 4 provides for the embodiment of the present invention;
The flow chart of the LED electric current of flash lamp method to set up that Fig. 5 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of LED electric current of flash lamp setting device and method, flash photographing device, in order to solve LED photoflash lamp when background is darker, to the problem of background under-exposure far away.
In the LED electric current of flash lamp setting device that the embodiment of the present invention provides, parameter acquisition module, for voice coil motor (VoiceCoil Motor, the VCM) code (VCM code) obtained after obtaining the flash photographing device auto-focusing at LED photoflash lamp place; Processing module, the VCM code for obtaining according to parameter acquisition module determines the output total current value of LED photoflash lamp.
Because VCM code can reflect the distance of subject, therefore the embodiment of the present invention can realize this arranges LED photoflash lamp output total current value according to the distance of subject, so just without the need to excessively adjusting time for exposure and ISO, thus when avoiding the output total current value adopting fixing LED photoflash lamp, shortening time for exposure or reduction ISO cause the problem of background under-exposure.
Such as: if subject is close to camera, then according to the VCM code obtained after auto-focusing, the output total current value of less LED photoflash lamp is set, now just without the need to excessively shortening the time for exposure and reducing ISO, compared with the technology adopted at present, be equivalent to increase the time for exposure of background or improve the ISO of background.
Below, by reference to the accompanying drawings the embodiment of the present invention is described in detail.First, introduce the flash photographing device that the embodiment of the present invention provides, then introduce LED electric current of flash lamp setting device and method that the embodiment of the present invention provides.
The structural representation of the flash photographing device 10 that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, this device comprises:
LED photoflash lamp 101, the LED drive integrated circult (IntegratedCircuit, IC) 102 be connected with LED photoflash lamp 101, camera 103, and the processor 104 be connected with camera 103 and LED drive IC 102.
Wherein, processor 104, after controlling camera 103 auto-focusing, obtains voice coil motor VCM code; The output total current value of LED photoflash lamp is determined according to the VCM code obtained; The output total current value of the LED photoflash lamp determined is issued LED drive IC 102;
LED drive integrated circult IC102, for the output total current value of LED photoflash lamp sent according to processor 104, control LED photoflash lamp 101 is luminous.
Particularly, LED photoflash lamp 101 can comprise one or plurality of LEDs lamp, if comprise plurality of LEDs lamp, this plurality of LEDs lamp can have identical colour temperature or different-colour.
LED photoflash lamp 101, under the driving of LED drive IC 102, sends the light of specified intensity and appointment duration.This specified intensity and appointment duration are controlled by LED drive IC 102 by processor 104.
If LED photoflash lamp 101 comprises a LED lamp, or comprise the LED of many identical colour temperatures, then LED photoflash lamp 101 sends monochromatic Wen Guang; If LED photoflash lamp 101 comprises the LED of many different-colours, then send the light of variable color-temperature.
LED drive IC 102 is responsible for the switch of control LED photoflash lamp 101, the size of LED photoflash lamp 101 output current and duration etc.
Camera 103 is responsible for gathering preview data and data of taking pictures.
Processor 104 can comprise one or more processor, such as: comprise application processor (the Application Processor shown in Fig. 1, AP) 1041 and image-signal processor (Image Signal Processor, ISP) 1042.
If processor 104 comprises multiple processor, then the plurality of processor comprised worked in coordination with take pictures, the controlling functions of photoflash lamp.Such as: AP1041 controls to take pictures flow process, control LED drive IC 102 etc.; ISP1042 is responsible for the data processing camera 103, carries out auto-focusing process and automatic exposure process etc.
When arranging the electric current of LED photoflash lamp 101, particularly, as mentioned above, after processor 104 controls camera 103 auto-focusing, VCM code is obtained; The output total current value of LED photoflash lamp 101 is determined according to the VCM code obtained; The output total current value of the LED photoflash lamp 101 determined is issued LED drive IC 102.
Wherein, can control camera 103 auto-focusing, and obtain the VCM code after camera 103 auto-focusing by ISP1042, or obtain the VCM code after auto-focusing by AP1041, concrete which kind of mode of employing, can determine according to the concrete condition of Realization of Product.Such as: according to the processing load of AP1041 and ISP1042, the process obtaining VCM code is realized by the processor that processing load is lighter.
If obtain VCM code by ISP1042, then the VCM code of acquisition is issued AP1041 by ISP1042, AP1041 determines the output total current value of LED photoflash lamp 101 according to the VCM code received from ISP1042, afterwards, the output total current value of this LED photoflash lamp 101 determined is issued LED drive IC 102.
Alternatively, the corresponding relation of the output total current value that AP1041 can need according to the VCM code demarcated in advance and LED photoflash lamp 101, the output total current value that this LED photoflash lamp 101 corresponding to VCM code finding acquisition needs, using the output total current value of this value found as the LED photoflash lamp 101 determined.
Alternatively, as shown in Figure 2, AP1041 demarcates the corresponding relation of the output total current value that VCM code and LED photoflash lamp 101 need by following steps:
S201: effective distance that affects of LED photoflash lamp 101 is divided into N number of focusing interval;
S202: the LED photoflash lamp supported in LED drive IC 102 exports within the scope of total current, and the output total current of LED photoflash lamp is divided into N number of shelves;
Alternatively, each total current shelves have corresponding preflashing total current and dodge total current by force, in other words, preflashing total current being divided into N number of shelves, being also divided into N number of shelves by dodging by force total current.
The scheme that the embodiment of the present invention arranges LED electric current of flash lamp had both been applicable to arrange preflashing total current, was also applicable to arrange and dodged total current by force.
S203: each focusing interval for the N number of focusing divided is interval, is obtained the output total current value of the LED photoflash lamp 101 needed by test;
S204: the first corresponding relation demarcating the output total current value that focusing interval needs with LED photoflash lamp 101, as shown in Table 1 below (for strong lightning stream);
S205: focus in each the focusing interval in N number of focusing interval;
Such as: in coboundary or the focusing of lower boundary place in this focusing interval;
S206: the second corresponding relation demarcating each focusing interval and VCM code, as shown in Table 2 below (for strong lightning stream);
S207: according to the second corresponding relation demarcated in the first corresponding relation demarcated in step S204 and step S206, the corresponding relation of the output total current value that demarcation VCM code and LED photoflash lamp 101 need, as shown in Table 3 below.
Table 1, interval the first corresponding relation with exporting total current value of focusing
| Focusing is interval | Export total current value |
| >200cm | 1500mA |
| >=100cm, and≤200cm | 1000mA |
| >=50cm, and≤99cm | 750mA |
| >=25cm, and≤49cm | 375mA |
| >=0cm, and≤25cm | 187mA |
The second corresponding relation that table 2, VCM code are interval with focusing
| VCM code | Focusing is interval |
| >=0, and≤150 | >200cm |
| >=151, and≤200 | >=100cm, and≤200cm |
| >=201, and≤300 | >=50cm, and≤99cm |
| >=301, and≤400 | >=25cm, and≤49cm |
| >=401, and≤500 | >=0cm, and≤25cm |
Table 3, VCM code and the corresponding relation exporting total current value
| VCM code | Export total current value |
| >=0, and≤150 | 1500mA |
| >=151, and≤200 | 1000mA |
| >=201, and≤300 | 750mA |
| >=301, and≤400 | 375mA |
| >=401, and≤500 | 187mA |
Alternatively, if LED photoflash lamp 101 is made up of the LED that many colour temperatures are different, then export except total current except arranging, also need for each LED lamp distributes electric current, for this situation, after step S207, also can comprise step S208: for each the LEDs drive IC 102 in LED photoflash lamp 101 distributes electric current.
Such as: the strong sudden strain of a muscle total current value that step S207 determines is 1500mA, preflashing total current value is 180mA, because LED brightness under same current of different-colour may have larger difference, therefore in order to preflashing light-metering is accurate, need the combination of the preflashing electric current ensureing each LED identical with the ratio of the combination of the strong lightning stream of each LED.
Such as: strong total current value of dodging is: 1500mA, and preflashing total current value is: 180mA;
Suppose that LED photoflash lamp 101 comprises two LED, be respectively LED1 and LED2, if being combined as of the strong lightning stream of each LED: LED1:500mA, LED2:1000mA, then
Being combined as of the preflashing electric current of each LED: LED1:60mA, LED2:120mA.
When distributing electric current for each LED, can distribute according to Automatic white balance (Auto WhiteBalance, AWB) yield value during preview.
Wherein, processor 104 is before acquisition VCM code, and obtain AWB yield value during preview, alternatively, this AWB yield value can be determined by AP1041 or ISP1042.
Alternatively, before processor 104 obtains VCM code, first to obtain ambient brightness value during preview.Similar with the mode obtaining VCM code, ambient brightness value can be obtained by AP1041, also can be obtained by ISP1042.If obtained by ISP1042, then ISP1042 control camera 103 carries out preview, the brightness of camera 103 induced environment, the information of the ambient brightness sensed is returned to ISP1042, ISP1042 is according to the ambient brightness value during information determination preview of ambient brightness received, the ambient brightness value determined is issued AP1041, and AP1041, according to this ambient brightness value and aforesaid VCM code, determines the output total current value of LED photoflash lamp 101.
AP1041, when determining the output total current value of LED photoflash lamp 101, according to the VCM code obtained and ambient brightness value, can determine the output total current value of LED photoflash lamp 101.
Such as: when ambient brightness value is less than default low light according to threshold value, on the output total current value basis determined according to VCM code, improve a grade, such as: with reference to table 3, determine that exporting total current value is 750mA, if ambient brightness value is less than default low light according to threshold value, then, on the basis of 750mA, output total current value is promoted to 1000mA.
For another example: when ambient brightness value is greater than default high illumination threshold value, on the output total current value basis determined according to VCM code, improve a grade, such as: with reference to table 3, determine that exporting total current value is 375mA, if ambient brightness value is greater than default high illumination threshold value, then, on the basis of 375mA, output total current value is reduced to 750mA.
Below, by embodiment one, the flow process of taking pictures during the LED electric current of flash lamp plan of establishment adopting the embodiment of the present invention to provide is described.
[embodiment one]
In embodiment one, the LED comprising multiple different-colour for LED photoflash lamp 101 is described.As shown in Figure 3, the flow process of taking pictures of embodiment one comprises the steps:
S301:AP1041 obtains the VCM code after auto-focusing, and following parameters during preview: the parameter such as surround lighting bright values, AWB yield value, ISO value, time for exposure; AP1041 preserves the above-mentioned parameter obtained;
S302:AP1041, according to the VCM code obtained, determines corresponding to flash by force in journey, the output total current value of LED photoflash lamp 101;
The ambient brightness value during preview of S303:AP1041 by acquisition compares according to threshold value with the high illumination threshold value preset and default low light, if ambient brightness value is less than low light according to threshold value or be greater than high illumination threshold value, then the basis of the output total current determined in step S302 improves one grade; Again according to demarcate in advance strong dodge time the output total current value of LED photoflash lamp 101 and preflashing time LED photoflash lamp 101 the corresponding relation of output total current value, the output total current value of LED photoflash lamp 101 when determining preflashing;
S304:AP1041 according to determine in the AWB yield value when VCM code obtained in step S301, preview, step S302 strong dodge time the output total current value of LED photoflash lamp 101, the current value of each LED in LED photoflash lamp 101 when determining to dodge by force; AP1041 according to the output total current value of the LED photoflash lamp 101 during the preflashing determined in the AWB yield value when VCM code obtained in step S301, preview, step S303, the current value of each LED in LED photoflash lamp 101 when determining preflashing;
Particularly, AP1041 can obtain the currents combination of each LED in the LED photoflash lamp 101 of LED drive IC 102 support in advance, and demarcates AWB yield value corresponding to each currents combination in advance;
AP1041 is according to the output total current value of the LED photoflash lamp 101 during the strong sudden strain of a muscle determined, find from above-mentioned each currents combination electric current and value for determine strong sudden strain of a muscle time each currents combination of output total current value of LED photoflash lamp 101, from each currents combination found, select the immediate currents combination of AWB yield value during the preview of corresponding AWB yield value and acquisition, when determining to dodge by force, the current value of each LED of LED photoflash lamp 101 is the value of each electric current in the currents combination of this selection;
Similarly, AP1041 also determine preflashing time LED photoflash lamp 101 in the current value of each LED;
S305:AP1041 starts preflashing light-metering, and ambient brightness value when obtaining preflashing;
Particularly, the current value of each LED in the LED photoflash lamp 101 during the preflashing can determined according to step S304, controls each LED luminous, carries out preflashing light-metering;
S306:AP1041 is according to the result of preview, preflashing light-metering, and the relation of preflashing current value and strong lightning flow valuve, when determining to dodge by force need ISO value and and the time for exposure;
Particularly, AP1041 according to the ambient brightness value during preview obtained in step S301, and obtain in step S305 preflashing time ambient brightness value, the brightness value of LED photoflash lamp 101 when determining preflashing;
Corresponding relation (by test calibration) between the brightness value of the LED photoflash lamp 101 of AP1041 according to the brightness value of the LED photoflash lamp 101 when demarcating preflashing in advance and when dodging by force, the brightness value of LED photoflash lamp 101 when determining to dodge by force;
AP1041 again according to the brightness value of LED photoflash lamp 101 when determining to dodge by force, the ambient brightness value during preview of acquisition, and the output total current value of the strong LED photoflash lamp 101 when dodging determined, the ISO value needed when determining to dodge by force and and time when exposing;
AWB yield value (the AWB yield value demarcated in advance) corresponding for the currents combination found in AWB yield value when obtaining preview in step S301 and step S304 is weighted on average by S307:AP1041, determines AWB yield value when dodging by force;
Strong ISO value when dodging determined in S308:AP1041 setting steps S306 and time for exposure, the current value of each LED in the strong LED photoflash lamp 101 when dodging determined in step S304, and determine in step S307 strong sudden strain of a muscle time AWB yield value;
The parameters that S309:AP1041 is arranged according to step S308, starts exposure of taking pictures, and start strong sudden strain of a muscle, end exposure closes photoflash lamp simultaneously simultaneously.
Above, describe the flash photographing device that the embodiment of the present invention provides, and described the flow process of flash photographing by embodiment one.Based on identical inventive concept, the embodiment of the present invention additionally provides LED electric current of flash lamp setting device and method, the flash photographing device provided due to principle and the embodiment of the present invention of its technical solution problem is similar, and it implements the enforcement that can refer to this flash photographing device, repeats part and repeats no more.
The structural representation of the LED electric current of flash lamp setting device that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, this device comprises:
Parameter acquisition module 401, for the voice coil motor VCM code obtained after obtaining the flash photographing device auto-focusing at LED photoflash lamp place, the VCM code that parameter acquisition module 401 obtains is relevant to the distance between flash photographing device and subject;
Processing module 402, the VCM code for obtaining according to parameter acquisition module 401 determines the output total current value of LED photoflash lamp, and the output total current value of the LED photoflash lamp that processing module 402 is determined is luminous for control LED photoflash lamp.
Alternatively, processing module 402 also for: determine the output total current value of LED photoflash lamp at the VCM code obtained according to parameter acquisition module 401 before, demarcate the corresponding relation of the output total current value that VCM code and LED photoflash lamp need as follows:
For effective each of focusing interval N number of affecting distance and comprise of LED photoflash lamp, test the output total current value that LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to the first corresponding relation and the second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and LED photoflash lamp need;
Processing module 402, specifically for the corresponding relation of the output total current value needed according to the VCM code determined and LED photoflash lamp, determines the output total current value of the LED photoflash lamp of the VCM code correspondence obtained.
Alternatively, parameter acquisition module 401 also for: before acquisition VCM code, obtain ambient brightness value during flash photographing device preview;
Processing module 402 specifically for:
The VCM code obtained according to parameter acquisition module 401 and ambient brightness value, determine the output total current value of LED photoflash lamp.
Alternatively, exporting total current value is that LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
Alternatively, if exporting total current value is that LED photoflash lamp is flashing by force the output total current value in journey, and LED photoflash lamp comprises the LED of multiple different-colour, then
Parameter acquisition module 401 also for: before acquisition VCM code, obtain Automatic white balance AWB yield value during flash photographing device preview;
Processing module 402 also for: after the VCM code obtained according to parameter acquisition module 401 determines the output total current value of LED photoflash lamp, according to the AWB yield value that parameter acquisition module 401 obtains, and the output total current value determined, determine the current value of each LED that LED photoflash lamp comprises.
The flow chart of the LED electric current of flash lamp method to set up that Fig. 5 provides for the embodiment of the present invention.As shown in Figure 5, the method comprises:
S501: the voice coil motor VCM code obtained after obtaining flash photographing device auto-focusing, the VCM code of acquisition is relevant to the distance between flash photographing device and subject;
S502: the output total current value determining the LED photoflash lamp of flash photographing device according to the VCM code obtained, the output total current value of the LED photoflash lamp determined is luminous for control LED photoflash lamp.
Alternatively, before step S502 determines the output total current value of the LED photoflash lamp of flash photographing device according to the VCM code obtained, also comprise:
Demarcate the corresponding relation of the output total current value that VCM code and LED photoflash lamp need as follows: LED photoflash lamp effective is affected to each of N number of interval of focus that distance comprises, the output total current value of test LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to the first corresponding relation and the second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and LED photoflash lamp need;
Step S502 determines the output total current value of LED photoflash lamp according to the VCM code obtained, and comprising:
The corresponding relation of the output total current value needed according to the VCM code determined and LED photoflash lamp, determines the output total current value of the LED photoflash lamp of the VCM code correspondence obtained.
Alternatively, before acquisition VCM code, also comprise: obtain ambient brightness value during flash photographing device preview;
Determine the output total current value of the LED photoflash lamp of flash photographing device according to the VCM code obtained, comprising: according to the VCM code obtained and ambient brightness value, determine the output total current value of LED photoflash lamp.
Alternatively, exporting total current value is that LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
Alternatively, if exporting total current value is that LED photoflash lamp is flashing by force the output total current value in journey, and LED photoflash lamp comprises the LED of multiple different-colour, then
Before acquisition VCM code, also comprise: obtain Automatic white balance AWB yield value during flash photographing device preview;
After determining the output total current value of the LED photoflash lamp of flash photographing device according to the VCM code obtained, also comprise: according to the AWB yield value obtained, and the output total current value determined, determine the current value of each LED that LED photoflash lamp comprises.
To sum up, the embodiment of the present invention provides a kind of LED electric current of flash lamp setting device and method, flash photographing device.Wherein, because VCM code can reflect the distance of subject, therefore the embodiment of the present invention can realize the output total current value arranging LED photoflash lamp according to the distance of subject, so just without the need to excessively adjusting time for exposure and ISO, thus when avoiding the output total current value adopting fixing LED photoflash lamp, shortening time for exposure or reduction ISO cause the problem of background under-exposure.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (15)
1. a LED electric current of flash lamp setting device, is characterized in that, comprising:
Parameter acquisition module, for the voice coil motor VCM code obtained after obtaining the flash photographing device auto-focusing at LED photoflash lamp place, the described VCM code that described parameter acquisition module obtains is relevant to the distance between described flash photographing device and subject;
Processing module, the VCM code for obtaining according to described parameter acquisition module determines the output total current value of described LED photoflash lamp, and the output total current value of the described LED photoflash lamp that described processing module is determined is luminous for controlling described LED photoflash lamp.
2. device as claimed in claim 1, is characterized in that,
Described processing module also for: determine the output total current value of described LED photoflash lamp at the VCM code obtained according to described parameter acquisition module before, demarcate the corresponding relation of the output total current value that VCM code and described LED photoflash lamp need as follows:
For effective each of focusing interval N number of affecting distance and comprise of described LED photoflash lamp, test the output total current value that described LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the described LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to described first corresponding relation and described second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and described LED photoflash lamp need;
Described processing module, specifically for the corresponding relation of the output total current value needed according to the described VCM code determined and described LED photoflash lamp, determines the output total current value of the described LED photoflash lamp of the VCM code correspondence obtained.
3. device as claimed in claim 1 or 2, is characterized in that,
Described parameter acquisition module also for: acquisition described VCM code before, obtain ambient brightness value during described flash photographing device preview;
Described processing module specifically for:
The described VCM code obtained according to described parameter acquisition module and described ambient brightness value, determine the output total current value of described LED photoflash lamp.
4. the device as described in any one of claims 1 to 3, is characterized in that, described output total current value is that described LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
5. device as claimed in claim 4, it is characterized in that, if described output total current value is described LED photoflash lamp flashing by force the output total current value in journey, and described LED photoflash lamp comprises the LED of multiple different-colour, then
Described parameter acquisition module also for: acquisition described VCM code before, obtain Automatic white balance AWB yield value during described flash photographing device preview;
Described processing module also for: after the VCM code obtained according to described parameter acquisition module determines the output total current value of described LED photoflash lamp, according to the AWB yield value that described parameter acquisition module obtains, and the output total current value determined, determine the current value of each LED that described LED photoflash lamp comprises.
6. a flash photographing device, comprising: LED photoflash lamp, the LED drive integrated circult IC, the camera that are connected with described LED photoflash lamp, and the LED electric current of flash lamp setting device be connected with described camera and described LED drive IC; It is characterized in that,
Described LED electric current of flash lamp setting device, after controlling described camera auto-focusing, obtains voice coil motor VCM code; The output total current value of LED photoflash lamp is determined according to the VCM code obtained; The output total current value of the LED photoflash lamp determined is issued described LED drive IC;
Described LED drive integrated circult IC, for the output total current value of the LED photoflash lamp according to described LED electric current of flash lamp setting device transmission, controls described LED photoflash lamp luminous.
7. flash photographing device as claimed in claim 6, is characterized in that,
Described LED electric current of flash lamp setting device also for: before determining the output total current value of LED photoflash lamp according to the VCM code obtained, demarcate the corresponding relation of the output total current value that VCM code and described LED photoflash lamp need as follows:
For effective each of focusing interval N number of affecting distance and comprise of described LED photoflash lamp, test the output total current value that described LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the described LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to described first corresponding relation and described second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and described LED photoflash lamp need;
Described LED electric current of flash lamp setting device, specifically for the corresponding relation of the output total current value needed according to the described VCM code determined and described LED photoflash lamp, determines the output total current value of the described LED photoflash lamp of the VCM code correspondence obtained.
8. flash photographing device as claimed in claims 6 or 7, is characterized in that,
Described LED electric current of flash lamp setting device also for: before the described VCM code of acquisition, control described camera and carry out preview, and ambient brightness value when obtaining preview;
Described LED electric current of flash lamp setting device specifically for: according to obtain described VCM code and described ambient brightness value, determine the output total current value of described LED photoflash lamp.
9. the device as described in any one of claim 6 ~ 8, is characterized in that, described output total current value is that described LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
10. device as claimed in claim 9, is characterized in that,
If described output total current value is described LED photoflash lamp flashing by force the output total current value in journey, and described LED photoflash lamp comprises the LED of multiple different-colour, then
Described LED electric current of flash lamp setting device also for: before the described VCM code of acquisition, control described camera and carry out preview, and Automatic white balance AWB yield value when obtaining preview;
After determining the output total current value of LED photoflash lamp according to the VCM code obtained, according to the AWB yield value obtained, and the output total current value determined, determine the current value of each LED that described LED photoflash lamp comprises, the current value of each LED comprised by the described LED photoflash lamp determined issues described LED drive IC;
Described LED drive IC, also for the current value of each LED that the described LED photoflash lamp sent according to described LED electric current of flash lamp setting device comprises, controls each LED that described LED photoflash lamp comprises luminous respectively.
11. 1 kinds of LED electric current of flash lamp methods to set up, is characterized in that, comprising:
The voice coil motor VCM code obtained after obtaining flash photographing device auto-focusing, the described VCM code of acquisition is relevant to the distance between described flash photographing device and subject;
Determine the output total current value of the LED photoflash lamp of described flash photographing device according to the VCM code obtained, the output total current value of the described LED photoflash lamp determined is luminous for controlling described LED photoflash lamp.
12. methods as claimed in claim 11, is characterized in that,
Before determining the output total current value of the LED photoflash lamp of described flash photographing device according to the VCM code obtained, also comprise: the corresponding relation demarcating the output total current value of VCM code and described LED photoflash lamp needs as follows: for effective each of focusing interval N number of affecting distance and comprise of described LED photoflash lamp, test the output total current value that described LED photoflash lamp needs respectively; First corresponding relation of the output total current value that the described LED photoflash lamp demarcating N number of focusing interval and test the interval correspondence of each focusing obtained needs; Focus in each focusing interval, demarcate the second corresponding relation of each focusing interval and VCM code; According to described first corresponding relation and described second corresponding relation, the corresponding relation of the output total current value that demarcation VCM code and described LED photoflash lamp need;
Determine the output total current value of LED photoflash lamp according to the VCM code obtained, comprising:
The corresponding relation of the output total current value needed according to the described VCM code determined and described LED photoflash lamp, determines the output total current value of the described LED photoflash lamp of the VCM code correspondence obtained.
13. methods as described in claim 11 or 12, is characterized in that,
Before the described VCM code of acquisition, also comprise: obtain ambient brightness value during described flash photographing device preview;
The described VCM code according to obtaining determines the output total current value of the LED photoflash lamp of described flash photographing device, comprising:
According to the described VCM code obtained and described ambient brightness value, determine the output total current value of described LED photoflash lamp.
14. methods as described in any one of claim 11 ~ 13, is characterized in that, described output total current value is that described LED photoflash lamp is in preflashing process or the output total current value of flashing by force in journey.
15. methods as claimed in claim 14, is characterized in that, if described output total current value is described LED photoflash lamp flashing by force the output total current value in journey, and described LED photoflash lamp comprises the LED of multiple different-colour, then
Before the described VCM code of acquisition, also comprise: obtain Automatic white balance AWB yield value during described flash photographing device preview;
After determining the output total current value of the LED photoflash lamp of described flash photographing device according to the VCM code obtained, also comprise:
According to the AWB yield value obtained, and the output total current value determined, determine the current value of each LED that described LED photoflash lamp comprises.
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