CN105446055B - Camera mould group and its focusing method - Google Patents
Camera mould group and its focusing method Download PDFInfo
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- CN105446055B CN105446055B CN201410267607.6A CN201410267607A CN105446055B CN 105446055 B CN105446055 B CN 105446055B CN 201410267607 A CN201410267607 A CN 201410267607A CN 105446055 B CN105446055 B CN 105446055B
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- shooting state
- current
- mould group
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Abstract
The invention discloses a kind of camera mould group and its focusing methods, which includes: processor, driving power, voice coil motor and camera lens；Wherein, the processor connects the driving power, for the current shooting state according to the camera mould group, starting driving current needed for obtaining the corresponding voice coil motor of the current shooting state, and control the driving power and provide the starting driving current to the voice coil motor, to drive the camera lens mobile.
Description
Technical field
The present invention relates to the camera mould group of electronic product more particularly to a kind of startings that can be achieved to automatically determine voice coil motor
The camera mould group and its focusing method of driving current size.
Background technique
Electronic product at present, such as smart phone, tablet computer etc. are each equipped with camera mould group, to meet the bat of user
Take the photograph demand.The micro-camera mould group of usual these electronic products configuration has automatic focusing function, to obtain clearer figure
Picture.
The focusing drive unit of micro-camera mould group generally uses voice coil motor.By providing driving electricity to voice coil motor
Stream makes voice coil motor that camera lens be driven to be moved to each scanning element.Processor judges each scanning element image definition, finds image clearly
It spends highest scanning element (i.e. focusing position) and provides corresponding driving current to voice coil motor, with moving lens to focusing position
Realize focusing.
But in actual photographed, camera mould group is usually to shoot to front, but be also frequently encountered upwardly or downwardly
The case where shooting.Currently, camera mould group is for forward, upwardly or downwardly the provided starting driving current of shooting is identical.So
And when shooting upward or downward, since camera lens is influenced by gravity, originates driving current required for moving and clap forward
It is slightly discrepant when taking the photograph.For example, the starting driving current of voice coil motor is slightly bigger than normal when camera lens is shot downwards, cause to occur
Distant view blooming；And camera lens to photographs when, the starting driving current of voice coil motor is slightly less than normal, causes distant view occur fuzzy
And phenomena such as focusing time extension.
Summary of the invention
In view of the problems of the prior art, the present invention provides a kind of starting drivings that can be achieved to automatically determine voice coil motor
The camera mould group and its focusing method of size of current.
Additional aspect and advantage of the invention will be set forth in part in the description, and partly will be from description
It is apparent from, or can practice through the invention and acquistion.
One aspect of the present invention provides a kind of camera mould group comprising: processor, driving power, voice coil motor and camera lens；
Wherein, the processor connects the driving power and works as described in acquisition for the current shooting state according to the camera mould group
Starting driving current needed for the corresponding voice coil motor of preceding shooting state, and the driving power is controlled to the voice coil horse
Up to the starting driving current is provided, to drive the camera lens mobile.
In an embodiment, the camera mould group further include: display module；The display module connects the processor,
For showing the different shooting states of the camera mould group, the current shooting state of the camera mould group for selection by the user, and
The current shooting state of the camera mould group of user's selection is supplied to the processor.
In another embodiment, the camera mould group further include: measurement module；Wherein, the different shooting state according to
Corner dimension between the front and horizontal plane of the camera lens determines；The measurement module connects the processor, described in measurement
Angle between the front and horizontal plane of camera lens, and the angle measured is sent to the processor；The processor
It is also used to obtain the current shooting state of the camera mould group according to the angle；Alternatively, described obtain the current shooting shape
Starting driving current needed for the corresponding voice coil motor of state includes: to calculate the current shooting state according to the angle
Starting driving current needed for the corresponding voice coil motor.
In another embodiment, the camera mould group further include: measurement module and display module；Wherein, the different bats
State is taken the photograph to be determined according to the corner dimension between the front and horizontal plane of the camera lens；The measurement module connects the processing
Device measures the angle between the front and horizontal plane of the camera lens, and the angle measured is sent to the processor；
The processor is also used to obtain the current shooting state reference value of the camera mould group according to the angle；The display mould
Block connects the processor, for showing the current shooting state reference value from the received camera mould group of the processor,
For user's confirmation, and by the current shooting state reference value of the camera mould group confirmed through the user, as the phase
The current shooting state of machine mould group, is supplied to the processor.
In another embodiment, the camera model further include: memory module connects the processor, for storing
Difference needed for the voice coil motor corresponding to the different shooting states of the camera model originates driving current；Wherein, institute
Stating starting driving current needed for obtaining the corresponding voice coil motor of the current shooting state includes: to the memory module
Starting driving current needed for inquiring the corresponding voice coil motor of the current state.
In another embodiment, the difference shooting state includes: upward shooting state, forward shooting state and bat downwards
Take the photograph state；The corresponding starting driving current of the upward shooting state is greater than that the shooting state forward is corresponding described to be risen
Beginning driving current, and the corresponding starting driving current of the shooting state forward is corresponding greater than the downward shooting state
The starting driving current.
Another aspect of the present invention provides a kind of focusing method of camera mould group, and the camera mould group includes camera lens, described
Focusing method includes: to obtain the corresponding driving institute of the current shooting state according to the current shooting state of the camera mould group
Starting driving current needed for stating camera lens；And according to the starting driving current, drive the movement of the camera lens.
In an embodiment, the focusing method further include: show the different shooting states of the camera mould group, for
Family selects the current shooting state of the camera mould group；The current shooting state for the camera mould group that user is selected is as institute
State the current shooting state of camera mould group.
In another embodiment, the difference shooting state is big according to the angle between the front and horizontal plane of the camera lens
Small determination；The focusing method further include: measure the angle between the front and horizontal plane of the camera lens；According to the angle,
Obtain the current shooting state of the camera mould group；Alternatively, described obtain the corresponding driving mirror of the current shooting state
Starting driving current needed for head includes: to calculate the corresponding driving camera lens of the current shooting state according to the angle
Required starting driving current.
In another embodiment, the difference shooting state is big according to the angle between the front and horizontal plane of the camera lens
Small determination；The focusing method further include: measure the angle between the front and horizontal plane of the camera lens；According to the angle,
Obtain the current shooting state reference value of the camera mould group；Show the current shooting state reference value of the camera mould group, with
Confirm for user, and by the current shooting state reference value of the camera mould group confirmed through the user, as the camera
The current shooting state of mould group.
In another embodiment, the focusing method further include: the different shooting states institute for storing the camera model is right
Difference starting driving current needed for the driving camera lens answered；Wherein, described to obtain the corresponding drive of the current shooting state
Starting driving current needed for moving the camera lens includes: to inquire the corresponding voice coil motor institute of the stored current state
The starting driving current needed.
In another embodiment, the difference shooting state includes: upward shooting state, forward shooting state and bat downwards
Take the photograph state；The corresponding starting driving current of the upward shooting state is greater than that the shooting state forward is corresponding described to be risen
Beginning driving current, and the corresponding starting driving current of the shooting state forward is corresponding greater than the downward shooting state
The starting driving current.
Camera mould group provided in an embodiment of the present invention and its focusing method, by presetting different rise for different shooting states
Beginning driving current, and by the judgement to shooting state, so that voice coil motor is quickly obtained suitable starting driving current, from
And drive camera lens quickly and accurately to focus, avoid due to starting driving current it is excessive or it is too small cause to occur it is blurred image
Phenomenon, and starting driving current it is too small caused by the phenomenon that focusing time extends in shooting process.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 illustrates the structural schematic diagram of the camera mould group of the embodiment of the present invention.
Fig. 2 illustrates relational graph when to photographs between lens displacement and driving current size.
Relational graph when Fig. 3 illustrates shooting forward between lens displacement and driving current size.
Relational graph when Fig. 4 illustrates downward shooting between lens displacement and driving current size.
Fig. 5 illustrates the schematic diagram of angle between camera lens and horizontal plane.
Fig. 6 illustrates the flow chart of the focusing method of the embodiment of the present invention.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.
Described feature or structure etc. can be incorporated in any suitable manner in one or more embodiments.?
In following description, many details are provided to provide and fully understand to embodiments of the present invention.However, this field
Technical staff will be appreciated that it is one or more in no specific detail, or using other methods, constituent element etc.,
Technical solution of the present invention can be practiced.In other cases, be not shown in detail or describe known features or operation to avoid
The fuzzy present invention.
Fig. 1 illustrates the structural schematic diagram of the camera mould group of the embodiment of the present invention.As shown in Figure 1, camera mould group includes: to deposit
Store up module 110, processor 120, driving power 140, voice coil motor 150, camera lens 160 and display module 170.
Memory module 110 is used to store the starting driving current of corresponding each shooting state.Wherein each shooting state for example wraps
Include shooting state, upward shooting state and downward shooting state forward.
Memory module 110 for example can be read-only memory (read-only memory, ROM), flash memory (flash
Memory) Electrical Erasable read-only memory ((Electrically Erasable Programmable Read-Only
Memory, EEPROM) or security storage card ((Secure Digital Memory Card), invention is not limited thereto.
Fig. 2-Fig. 4 illustrate respectively upwards, forward and downward shoot when lens displacement and driving current size between pass
System's figure.When as shown in figs 2-4, to photographs, when originating driving current and reaching 28mA, camera lens starts to move；It shoots forward
When, when starting driving current reaches 22mA, camera lens starts to move；Downwards when shooting, when starting driving current reaches 19mA,
Camera lens starts to move.
Therefore, the corresponding starting driving current of each shooting state that memory module 110 is stored for example can be with are as follows: claps upwards
When taking the photograph, starting driving current is 28mA；When shooting forward, starting driving current is 22mA；Downwards when shooting, driving circuit is originated
For 19mA.But invention is not limited thereto, as needed, or other different starting drivings are arranged in each shooting state
Electric current.
Display module 170 connects processor 120, and the shooting state for showing different is selected for user, and will be used
The result of family selection is supplied to processor 120.
Display module 170 is, for example, the touch display screen of affiliated electronic equipment (such as smart phone), in addition to aobvious to user
Show outside different shooting states, the selection that user can also carry out shooting state by touching the display module 170.
In addition, camera mould group further includes input module, display module 170 connects input module.Display module 170 to
After family progress shooting state is shown, user is selected by operation input module, and selection result is transferred to display module
170.Input module is, for example, the keyboard of affiliated electronic equipment (such as smart phone).
According to another embodiment of the invention, camera mould group further includes measurement module 130.130 junction of measurement module
Device 120 is managed, is sent to processor 120 for measuring the angle α between camera lens 160 and horizontal plane, and by measured value.
Fig. 5 illustrates the schematic diagram of angle between camera lens and horizontal plane.As shown in figure 5, define 160 place plane of camera lens with
The angle of horizontal plane is α, when 160 front of camera lens is (i.e. towards the one side of object to be captured, such as the one side institute in terms of direction shooting in figure
Show) it is horizontal downward when, α is 0 degree, when 160 front level of camera lens upward when, α is 180 degree.
The above-mentioned definition for angle α is only one embodiment of the present of invention, and the invention is not limited thereto.Such as it can also determine
160 front of adopted camera lens it is horizontal upward when, α is 0 degree；And when the front of camera lens 160 it is horizontal downward when, α is 180 degree.
Measurement module 130 can be for example gravity sensor, can accurately be surveyed by the horizontal measuring instrument in gravity sensor
Measure the tilt angle of Devices to test with respect to the horizontal plane.
Processor 120 receives the measurement result of measurement module 130, and according to preset shooting state decision rule,
Judge current shooting state.
Preset decision rule for example can be with are as follows:
If the front for defining camera lens 160 it is horizontal downward when α be 0 degree, the front of camera lens 160 it is horizontal upward when α be 180
Degree, then define each shooting state are as follows: is downward shooting state when 45 ° of 0 °≤α <；When 135 ° of 45 °≤α <, to clap forward
Take the photograph state；It is upward shooting state when 180 ° of 135 °≤α <.
If the front for defining camera lens 160 it is horizontal upward when α be 0 degree, the front of camera lens 160 it is horizontal downward when α be 180
Degree, then define each shooting state are as follows: is downward shooting state as 180 ° of 135 °≤α <；When 135 ° of 45 °≤α <, for forward
Shooting state；It is upward shooting state as 45 ° of 0 °≤α <.
Above-mentioned each threshold value for defining different conditions, can also set, however it is not limited to above-mentioned according to actual needs
0 degree, 45 degree, 135 degree and 180 degree.
Processor 120 connects memory module 110.Above-mentioned decision rule predetermined can store in processor 120；
It is stored in memory module 110, processor 120 obtains the decision rule from memory module 110.
Processor 120 judges measured value received from measurement module 130 according to above-mentioned decision rule, with determination
Current shooting state.
The shooting state can also be supplied to display module by still another embodiment in accordance with the present invention, processor 120
170。
Display module 170 shows above-mentioned shooting state, with the shooting state for prompting user current and gives user
With selection, and the result that user selects is sent to processor 120.
Processor 120 is also connected with driving power.Processor 120 through the foregoing embodiment in distinct methods obtain it is current
After shooting state, starting driving current corresponding to current shooting state is obtained from memory module 110, and control driving power
140 provide the starting driving current to voice coil motor 150 to drive camera lens 160 to start to move.
In addition, processor 120 can also the direct corner dimension according to measured by measurement module 130, calculate the folder in real time
The starting driving current size of required driving camera lens corresponding to the size of angle, without being inquired to memory module 110.It should
Calculation method is for example are as follows:
Front to define camera lens 160 it is horizontal downward when α for 0 degree, the front level of camera lens 160 upward when α be that 180 degree is
Example, if starting driving current value when α=90 degree is 22mA, the every reduction m degree of α, such as the driving electricity of starting corresponding to m=5, α
Stream reduces x mA, such as x=0.167mA；The every increase n degree of α, such as starting driving current corresponding to n=5, α increase ymA, example
Such as y=0.333mA.
Above-mentioned calculation method is only one embodiment of the present of invention, and invention is not limited thereto, can also be others
Calculation method, for example, be obtained ahead of time above-mentioned angle and originate driving current between curve, by inquire the curve to obtain
Originate driving current.
The microprocessor of the series such as can be ARM7, ARM9, ARM9E, ARM10E of ARM company of processor 120, this
Invention is not limited.
Fig. 6 illustrates the flow chart of the focusing method of the embodiment of the present invention.As shown in fig. 6, this method comprises:
Step S101, the corresponding starting driving current value of storage each shooting state of camera mould group；
For example, memory module 110 stores the starting driving current of corresponding each shooting state.Wherein each shooting state for example wraps
Include shooting state, upward shooting state and downward shooting state forward.
The corresponding starting driving current of each shooting state that memory module 110 is stored for example can be with are as follows: when to photographs,
Starting driving current is 28mA；When shooting forward, starting driving current is 22mA；Downwards when shooting, starting driving circuit is
19mA.But invention is not limited thereto, as needed, or other different starting driving electricity are arranged in each shooting state
Stream.
Step S102 obtains the shooting state of Current camera mould group；
For example, processor 120 obtains the shooting shape of Current camera module from display module 170 or measurement module 130
State.
According to one embodiment, display module 170 shows that a variety of different shooting states are selected for user, and user is selected
The result selected is supplied to processor 120.
According to another embodiment, measurement module 130 measures the angle α between camera lens 160 and horizontal plane, and by measured value
It is sent to processor 120；
Processor 120 receives the measurement result of measurement module 130, and according to preset shooting state decision rule,
Judge current shooting state.
According to further embodiment, the current shooting state of judgement is supplied to display module 170 by processor 120；
Display module 170 shows above-mentioned shooting state, with the shooting state for prompting user current and gives user
With confirmation, and the result that user confirms is sent to processor 120.
Step S103 obtains starting driving current value corresponding to the shooting state of Current camera mould group, Xiang Xiangji mould group
Voice coil motor the starting driving current is provided, to drive the camera lens of camera mould group to start to move.
For example, processor 120 obtains starting driving current corresponding to current shooting state from memory module 110, and
It controls driving power 140 and provides the starting driving current to voice coil motor 150 to drive camera lens 160 to start to move.
In addition, processor 120 can also the direct corner dimension according to measured by measurement module 130, calculate the folder in real time
The starting driving current size of required driving camera lens corresponding to the size of angle, without being inquired to memory module 110.It should
Calculation method is for example are as follows:
Front to define camera lens 160 it is horizontal downward when α for 0 degree, the front level of camera lens 160 upward when α be that 180 degree is
Example, if starting driving current value when α=90 degree is 22mA, the every reduction m degree of α, such as the driving electricity of starting corresponding to m=5, α
Stream reduces x mA, such as x=0.167mA；The every increase n degree of α, such as starting driving current corresponding to n=5, α increase ymA, example
Such as y=0.333mA.
Above-mentioned calculation method is only one embodiment of the present of invention, and invention is not limited thereto, can also be others
Calculation method, for example, be obtained ahead of time above-mentioned angle and originate driving current between curve, by inquire the curve to obtain
Originate driving current.
Camera mould group provided in an embodiment of the present invention and its focusing method, by presetting different rise for different shooting states
Beginning driving current, and by the judgement to shooting state, so that voice coil motor is quickly obtained suitable starting driving current, from
And drive camera lens quickly and accurately to focus, avoid due to starting driving current it is excessive or it is too small cause to occur it is blurred image
The phenomenon that focusing time extends in shooting process caused by phenomenon and starting driving current are too small.
It is particularly shown and described exemplary embodiments of the present invention above.It should be understood that the present invention is not limited to institute
Disclosed embodiment, on the contrary, it is intended to cover comprising various modifications within the scope of the appended claims and equivalent set
It changes.
Claims (6)
1. a kind of camera mould group characterized by comprising processor, driving power, voice coil motor and camera lens；Wherein,
The processor connects the driving power and works as described in acquisition for the current shooting state according to the camera mould group
Starting driving current needed for the corresponding voice coil motor of preceding shooting state, and the driving power is controlled to the voice coil horse
Up to the starting driving current is provided, to drive the camera lens mobile；
The camera mould group further include: display module；The display module connects the processor, for showing the camera mould
The different shooting states of group, for selection by the user the current shooting state of the camera mould group, and the phase that user is selected
The current shooting state of machine mould group is supplied to the processor；And
The camera mould group further include: memory module connects the processor, claps for storing the different of the camera mould group
Difference needed for taking the photograph the voice coil motor corresponding to state originates driving current；Wherein,
It is described obtain the corresponding voice coil motor of the current shooting state needed for starting driving current include: to be deposited to described
Starting driving current needed for storing up the corresponding voice coil motor of current state described in module polls.
2. camera mould group according to claim 1, which is characterized in that the camera mould group further include: measurement module；Its
In,
The difference shooting state is determined according to the corner dimension between the front and horizontal plane of the camera lens；
The measurement module connects the processor, measures the angle between the front and horizontal plane of the camera lens, and will measurement
To the angle be sent to the processor；
The processor is also used to obtain the current shooting state of the camera mould group according to the angle；Alternatively,
It is described obtain the corresponding voice coil motor of the current shooting state needed for starting driving current include: according to
Angle, starting driving current needed for calculating the corresponding voice coil motor of the current shooting state.
3. camera mould group according to claim 1, which is characterized in that the difference shooting state includes: to photographs shape
State, forward shooting state and downward shooting state；The corresponding starting driving current of the upward shooting state is greater than described
The corresponding starting driving current of shooting state forward, and the corresponding starting driving current of the shooting state forward is big
In the corresponding starting driving current of the downward shooting state.
4. a kind of focusing method of camera mould group, the camera mould group includes camera lens characterized by comprising
According to the current shooting state of the camera mould group, obtain needed for the corresponding driving camera lens of the current shooting state
Starting driving current；
According to the starting driving current, the movement of the camera lens is driven；
Show the different shooting states of the camera mould group, for selection by the user the current shooting state of the camera mould group；
The current shooting state for the camera mould group that user is selected is as the current shooting state of the camera mould group；And
Difference starting driving current needed for storing the driving camera lens corresponding to the different shooting states of the camera mould group；
Wherein
It is described obtain the corresponding driving camera lens of the current shooting state needed for starting driving current include: that inquiry has been deposited
Starting driving current needed for the corresponding voice coil motor of the current state of storage.
5. focusing method according to claim 4, which is characterized in that it is described difference shooting states according to the camera lens just
Corner dimension between face and horizontal plane determines；The focusing method further include:
Measure the angle between the front and horizontal plane of the camera lens；
According to the angle, the current shooting state of the camera mould group is obtained；Alternatively,
It is described obtain the corresponding driving camera lens of the current shooting state needed for starting driving current include: according to
Angle, starting driving current needed for calculating the corresponding driving camera lens of the current shooting state.
6. focusing method according to claim 4, which is characterized in that the difference shooting state includes: to photographs shape
State, forward shooting state and downward shooting state；The corresponding starting driving current of the upward shooting state is greater than described
The corresponding starting driving current of shooting state forward, and the corresponding starting driving current of the shooting state forward is big
In the corresponding starting driving current of the downward shooting state.
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| CN201410267607.6A CN105446055B (en) | 2014-06-16 | 2014-06-16 | Camera mould group and its focusing method |
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| CN201410267607.6A CN105446055B (en) | 2014-06-16 | 2014-06-16 | Camera mould group and its focusing method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106506966A (en) * | 2016-11-30 | 2017-03-15 | 宇龙计算机通信科技(深圳)有限公司 | A kind of focusing method and device |
| JP6776494B2 (en) * | 2018-10-24 | 2020-10-28 | ビクター ハッセルブラッド アクチボラーグＶｉｃｔｏｒ Ｈａｓｓｅｌｂｌａｄ Ａｂ | Control devices, imaging devices, moving objects, control methods, and programs |
| CN111158107B (en) * | 2020-01-03 | 2021-07-06 | 支付宝(杭州)信息技术有限公司 | Focusing method, device and equipment of lens module |
| CN113496522A (en) * | 2020-04-01 | 2021-10-12 | 支付宝(杭州)信息技术有限公司 | Method and device for calibrating lens module comprising voice coil motor |
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| CN105446055A (en) | 2016-03-30 |
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