CN103888675B - The method for detecting position and camera module of camera module camera lens module - Google Patents
The method for detecting position and camera module of camera module camera lens module Download PDFInfo
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- CN103888675B CN103888675B CN201410153063.0A CN201410153063A CN103888675B CN 103888675 B CN103888675 B CN 103888675B CN 201410153063 A CN201410153063 A CN 201410153063A CN 103888675 B CN103888675 B CN 103888675B
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Abstract
A kind of method for detecting position and camera module of camera module camera lens module, methods described include：The camera lens module is controlled, makes photosurface of the light by the camera lens module in described image sensor form a hot spot；At least two regions on the photosurface of described image sensor are chosen, according to the variable quantity of the brightness ratio and/or the ratio at least two region, position of the camera lens module with respect to the photosurface of described image sensor is detected.By methods described and camera module, camera lens module can be made to rapidly enter focusing area, so as to improve focusing efficiency.
Description
Technical field
The present invention relates to electronic equipment control field, more particularly to a kind of position detection side of camera module camera lens module
Method and camera module.
Background technology
According to optical principle, for different object distances, lens focusing position near the side of initial position, is focused all the time
When, camera lens starts search from initial position, and the direction of motion and move distance of camera lens are then controlled according to image definition.
The Telescopic pick-up head module larger for camera lens stroke, the optics stroke of its camera lens module（I.e. described camera lens mould
The distance that block can actually be moved）Than larger, it is possible to increase image quality, but this module is due to design feature, camera lens
Initial position is not at distant view focusing, therefore focusing area can be just entered after camera lens module stretches out certain distance.And due to mirror
Head stroke is larger, if the method using starting to search for from initial position, focusing speed can be slow.And in camera lens total travel
In most of region, image definition is all invalid.When this camera module is when taking pictures, if the touching interference in the external world
Camera lens is made to depart from focusing area, according to existing control method, camera module can cannot judge the right direction of motion of camera lens
And move distance, and initial position can only be returned to, then restart to search for focusing position, cause focusing less efficient.
The content of the invention
The problem that the embodiment of the present invention is solved is how to improve the focusing speed of camera lens module.
To solve the above problems, the embodiment of the present invention provides a kind of method for detecting position of camera module camera lens module,
Wherein, the camera module includes：Imageing sensor, which includes photosurface；Camera lens module, detection method include：Control institute
Camera lens module is stated, makes photosurface of the light by the camera lens module in described image sensor form a hot spot；Choose described
At least two regions on the photosurface of imageing sensor, according to the brightness ratio and/or the ratio at least two region
Variable quantity, detect position of the camera lens module with respect to the photosurface of described image sensor.
Optionally, the detection method also includes：According to the variable quantity of the brightness ratio at least two region, detection
Go out the movement velocity and the direction of motion of the camera lens module.
Optionally, corner and central area of at least two region for the photosurface of described image sensor, according to
The brightness ratio and/or the variable quantity of the ratio in the corner and central area of the photosurface of described image sensor, detects institute
State position of the camera lens module with respect to the photosurface of described image sensor.
Optionally, when the camera lens module is located between described image sensor and focusing area, described image sensing
The corner of the photosurface of device is partially located at outside the hot spot, and the corner is k=g (A- with the ratio of the brightness of central area
C (H-dtan (ω 2)))/S, wherein ω is the angle of visual field of camera lens module, and d is the phase of camera lens module and imageing sensor photosurface
Adjust the distance, H is half image height of imageing sensor, and c is the area system of the outer portion that imageing sensor photosurface corner is located at hot spot
Number, g are the relative illumination coefficient in imageing sensor photosurface corner and center, and A is the area of the imageing sensor corner chosen,
S is the area of the imageing sensor photosurface central area chosen；When the camera lens module is away from imageing sensor, the ratio
Value accordingly changes from small to large.
Optionally, when the camera lens module is located between focusing area and extraneous scene, and the camera lens module with it is described
From closely, when remote change, described hot spot is completely covered the photosurface of described image sensor to the distance of imageing sensor, described
Brightness on the photosurface of imageing sensor tends to uniform, the corner of described image sensor and the brightness ratio phase of central area
Should change from small to large.
Optionally, the detection method also includes：According to the relative described image sensor of the camera lens module for detecting
Photosurface position, the move distance and the direction of motion of corresponding control camera lens module, into focusing area.
To solve the above problems, the embodiment of the present invention additionally provides a kind of camera module, including：Circuit substrate；It is placed in
The imageing sensor of the circuit substrate, described image sensor include：Photosurface；Described image sensor is interval in, and is set
It is placed in the camera lens module on described image sensor top；The detection means of the circuit substrate is placed in, the detection means includes：
Control unit, moves along optical axis direction for controlling described camera lens module, makes light by camera lens module in imageing sensor
Photosurface formed a hot spot；Detector unit, for choosing at least two regions on the photosurface of described image sensor, root
According to the variable quantity of the brightness ratio and/or the ratio at least two region, the relatively described figure of the camera lens module is detected
As the position of the photosurface of sensor.
Optionally, the detector unit, for the variable quantity of the brightness ratio according at least two region, detects
The movement velocity and the direction of motion of the camera lens module.
Optionally, corner and central area of at least two described regions for imageing sensor photosurface.
Optionally, when the camera lens module is located between described image sensor and focusing area, described image sensing
The corner of the photosurface of device is partially located at outside the hot spot, and the corner is k=g (A- with the ratio of the brightness of central area
C (H-dtan (ω 2)))/S, wherein ω is the angle of visual field of camera lens module, and d is the phase of camera lens module and imageing sensor photosurface
Adjust the distance, H is half image height of imageing sensor, and c is the area system of the outer portion that imageing sensor photosurface corner is located at hot spot
Number, g are the relative illumination coefficient in imageing sensor photosurface corner and center, and A is the area of the imageing sensor corner chosen,
S is the area of the imageing sensor photosurface central area chosen；When the camera lens module is away from described image sensor, institute
State ratio accordingly to change from small to large.
Optionally, when the camera lens module is located between focusing area and extraneous scene, and the camera lens module with it is described
From closely, when remote change, the hot spot is completely covered the photosurface of described image sensor, the figure to the distance of imageing sensor
As the brightness on the photosurface of sensor tends to uniform, the corner of described image sensor is corresponding to the brightness ratio of central area
Change from small to large.
Optionally, described control unit, for according to the relative described image sensor of the camera lens module for detecting
The position of photosurface, accordingly controls the move distance and the direction of motion of the camera lens module, into focusing area.
To solve the above problems, the embodiment of the present invention additionally provides another kind of camera module, including：Circuit substrate；Put
In the imageing sensor of the circuit substrate, described image sensor includes：Photosurface；Described image sensor is interval in, and
It is arranged at the camera lens module on described image sensor top；It is placed in the detection means of the circuit substrate, the detection means bag
Include：Control detector unit, moves along optical axis direction for controlling the camera lens module, makes light by the camera lens module in institute
The photosurface for stating imageing sensor forms a hot spot；And for choosing at least twoth area on the photosurface of described image sensor
Domain, according to the variable quantity of the brightness ratio and/or the ratio at least two region, detects the camera lens module with respect to institute
State the position of the photosurface of imageing sensor.
Compared with prior art, the technical scheme of the embodiment of the present invention has advantages below：By movement images sensor
The brightness ratio in two regions on photosurface, counter can release distance of the camera lens module relative to imageing sensor photosurface, from
And control the direction of motion and move distance of camera lens module so as to focusing area is rapidly entered, and without the need in moving lens module
While search for focusing position, so as to improve focusing efficiency.
Further, by the change of the ratio of the brightness at least two region in movement images sensor photosensitive face
Change, the movement velocity and the direction of motion of camera lens module can be detected, and then adjust its motion state so as to rapidly enter focusing
Region, and initial position need not be return, so as to improve focusing efficiency.
Description of the drawings
Fig. 1 is a kind of structural representation of camera module of the embodiment of the present invention；
Fig. 2 is a kind of flow chart of the detection method of the camera lens module position of camera module of the embodiment of the present invention；
Fig. 3 is a kind of position view of the camera lens module with image sensitive device of camera module of the embodiment of the present invention；
Fig. 4 is a kind of structural representation of camera module of the embodiment of the present invention；
Fig. 5 is the structural representation of another kind of camera module of the embodiment of the present invention；
Fig. 6 is the structural representation of another camera module of the embodiment of the present invention；
Fig. 7 is the structural representation of another camera module of the embodiment of the present invention.
Specific embodiment
In the prior art, the design feature of camera module is limited by, the initial position of camera lens is at distant view focusing.But
It is the camera module larger for camera lens stroke, if the method using starting to search for from initial position, camera lens module stretches out
Focusing area can be just entered after certain distance, focusing speed can be slow.And in most of region of camera lens total travel, image
Definition is all invalid, reduces focusing efficiency.When camera module is when taking pictures, if the touching interference in the external world makes camera lens
Depart from focusing area, using existing control method, camera lens module cannot can judge the right direction of motion of camera lens and motion away from
From so initial position can only be returned to, then restarting to search for focusing position, cause focusing less efficient.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Embodiments provide a kind of detection method of the camera lens module position of camera module.Wherein, such as Fig. 1 institutes
Show, camera module includes：Imageing sensor 101 and moveable camera lens module 102.Wherein, camera lens module 102 can be arranged
In holding part（Such as find a view cylinder）In, and including at least a piece of lens 103.Incident light is by saturating in the camera lens module 102
Mirror 103 is incident upon on the photosurface of imageing sensor 101 and forms hot spot.When the camera lens module 102 passes through drive mechanism（In figure
It is not shown）When moving along optical axis, the hot spot on the photosurface of imageing sensor 101 can also occur respective change.It is being embodied as
In example, the drive mechanism can include lens bracket（lens holder）And lens sleeve, the camera lens module 102 fit
In in the lens sleeve along optical axis direction move.When the optics stroke of camera lens module is more than 0.5mm, such as using existing
Technology, focusing speed are slower.
As shown in Fig. 2 the detection method of the camera lens module position of the camera module of the embodiment of the present invention can include with
Lower step：
Step S101, controls the camera lens module, make light by the camera lens module described image sensor sense
Light face forms a hot spot.
Step S102, chooses at least two regions on the photosurface of described image sensor, according to described at least two
The variable quantity of the brightness ratio in region and/or the ratio, detects that the camera lens module is photosensitive with respect to described image sensor
The position in face.
At least two described regions, can choose one in four folding corner regions of imageing sensor photosurface and in
Heart district domain, by the ratio and/or the change of the ratio of the corner in movement images sensor photosensitive face and the brightness of central area
Amount, detects the position in the camera lens module relative image sensor photosensitive face.
In a particular embodiment, can choose positioned at imageing sensor photosurface center in imageing sensor photosurface
Multiple pixels in certain area（pixel）As the central area, such as 10 × 10 elemental area.Position is chosen simultaneously
In the certain area in corner multiple pixels as the folding corner region, such as 5 × 5 elemental area.
Can by by camera lens module be located between imageing sensor and focusing area and camera lens module be located at focusing area
Two kinds of situations between domain and external object, position of the difference detector lens module relative to imageing sensor photosurface.
When camera lens module is located between imageing sensor and focusing area, the focusing area of the camera lens module is located at entirely
The a certain fixed range of camera lens stroke.As when camera lens is located at focusing area, the diameter of hot spot is slightly larger than imageing sensor sense
The catercorner length in light face, and when camera lens is moved along optical axis direction near the direction of imageing sensor, the diameter of hot spot can be by
It is tapered little, cause four contention gradual changes of imageing sensor photosurface dark, it is possible to according to described image sensor photosurface
Four dark angles account for the ratio of photosurface, obtain when the camera lens module is located between imageing sensor and focusing area, mirror
The positional information of head.Therefore, the corner of imageing sensor photosurface and the ratio of the brightness of central area are exactly the center
The region covered by hot spot in domain and folding corner region.For example, the angle of 5 × 5 elemental areas is obtained by imageing sensor detection
The elemental area for having 3 × 3 in portion region is covered by hot spot, and 10 × 10 central areas are completely covered by hot spot, so as to available
Both ratio ks.
When detecting the ratio k and changing from small to large, explanatory diagram is as four corners in sensor photosensitive face are for gradually
Brighten, therefore, it is determined that the camera lens module is to move to away from imageing sensor from close imageing sensor.And work as and detect institute
When stating ratio k and changing from big to small, explanatory diagram is gradually dimmed as four corners in sensor photosensitive face, therefore, it is determined that the mirror
Head module is to move to close imageing sensor from away from imageing sensor.
As shown in figure 3, when camera lens module 102 is located between imageing sensor 101 and focusing area, hot spot can be obtained
Radius be, wherein ω is the angle of visual field of camera lens module 102, and d is camera lens module 102 and imageing sensor photosurface
101 relative distance.It is possible to further obtain in folding corner region being not H-dtan by the catercorner length of hot spot overlay area
(ω/2), wherein, half image heights of the H for imageing sensor 101, i.e., cornerwise half.Such that it is able to obtain folding corner region middle position
It is c (H-dtan (ω/2)) in the area of the outer portion of hot spot, wherein c is that 101 photosurface corner of imageing sensor is located at hot spot
Outer portion area coefficient.Therefore, in folding corner region by the region that hot spot is covered with the area ratio of central area it isWherein A is the area in 101 corner of imageing sensor chosen, and S is the imageing sensor chosen
The area of 101 photosurface central areas.The ratio of the brightness of corner and central area in imageing sensor 101 may finally be obtained
ForWherein g be can pass through the photosurface corner that automatically obtain of imageing sensor 101 with
The relative illumination coefficient at center is related to the attribute of imageing sensor.In Fig. 3, S ' is represented including the hot spot including the S of central area
Size.
With reference to the k values and the formula that are obtained by imageing sensor automatic detection
The value of d counter can be released, that is, obtains the relative distance of camera lens module and imageing sensor photosurface.
It is as another kind of concrete optional embodiment, dull as the k values follow the change of the relative distance d
Change, therefore the corresponding relation of k values and the relative distance d can also be preset, so as to pass through matching, directly obtain camera lens
The relative distance d of module and imageing sensor photosurface.
When camera lens module is located between focusing area and external object, as hot spot can be completely covered imageing sensor
Photosurface, and when camera lens is moved along optical axis direction away from the direction of imageing sensor, the diameter of hot spot gradually can increase, and make
The light intensity brightness obtained on imageing sensor photosurface gradually tends to uniform.Therefore can be detected on photosurface by imageing sensor
Central area and folding corner region brightness size, obtain the uniformity coefficient of light intensity, so as to obtain the positional information of camera lens.Cause
This, the corner of imageing sensor photosurface and the ratio of the brightness of central area are exactly bright in the central area and folding corner region
The ratio of degree.For example, the folding corner region brightness for obtaining 5 × 5 elemental areas by imageing sensor detection is k1, and 10 × 10 pictures
The central area brightness of vegetarian noodles product is k2, you can obtain both ratio ks.
As the k values follow the change of the relative distance d and monotone variation, therefore k values and institute can be preset
The corresponding relation of relative distance d is stated, so as to pass through to match the k values obtained by imageing sensor automatic detection, camera lens is directly obtained
The relative distance d of module and imageing sensor photosurface.
When camera lens module is located between focusing area and extraneous scene, described image sensor corner and center are detected
The ratio of the brightness in domain, i.e., above-mentioned ratio k.When the k changes from small to large, the camera lens module and described image are judged
The distance of sensor is from closely to remote change；When the k changes from big to small, judge that the camera lens module is passed with described image
Sensor is from as far as nearly change.
Step S103, according to the position in the camera lens module relative image sensor photosensitive face for detecting, accordingly controls camera lens
The move distance and the direction of motion of module, rapidly enters focusing area.
The relative distance d of camera lens module and imageing sensor photosurface, and root can quickly be obtained by step S102
According to the change of the ratio k, the direction of motion of camera lens module can be obtained.Due to focusing area it is relative in camera lens total travel
Position is fixed, therefore according to the relative distance of camera lens module and the imageing sensor photosurface for obtaining, can be by driving
Motor directly controls the moving direction and displacement of camera lens module so as to rapidly enter focusing area, and need not be using as now
There is technology that focusing is searched for while moving lens module, so as to improve focusing efficiency.
On the basis of above-mentioned specific embodiment, can also include：At least two according to imageing sensor photosurface
The variable quantity of the ratio of the brightness in individual region, detects the movement velocity and the direction of motion of camera lens module.
When the camera lens module in shooting process, made camera lens module depart from focusing area by extraneous touching interference
When, by the change of the comparison brightness ratio k, the direction of motion and movement velocity of camera lens module can be quickly determined that.
Specifically, when k changes are big, judge that camera lens module is moved away from imageing sensor；When k become hour, judge camera lens module be by
Nearly imageing sensor motion.By the relative distance d obtained according to the variable quantity of the k, and divided by the time, it is possible to obtain mirror
The movement velocity of head module.
Therefore, by the movement velocity and the direction of motion that detect camera lens module, quickly can be adjusted.For example
Extraneous touching interference is subject in camera lens module and departs from focusing area, when moving away from imageing sensor, by controlling camera
Motor, it is to move to imageing sensor to change its direction of motion.Therefore which need not be made to return initial position search again
Rope focusing position, so as to improve focusing efficiency.
Corresponding to the detection method of the camera lens module position of above-mentioned camera module, the embodiment of the present invention additionally provides one kind
Camera module, wherein can include：Circuit substrate, the image sensor chip being placed on circuit substrate, it is interval in the figure
As sensor and be located at image sensor chip top moveable mirror head module and be placed in the circuit substrate detection dress
Put.
Described detection means can include：Control unit 401 and detector unit 402.As shown in figure 4, the control
Unit 401 and detector unit 402 can be placed in 101 chip internal of imageing sensor, as shown in figure 5, described control unit
501 and detector unit 502 can also be placed in 101 chip exterior of imageing sensor same with 101 chip of imageing sensor
The circuit substrate 503 on.In a particular embodiment, the circuit substrate 503 can be printed circuit board (PCB)（PCB）Or it is flexible
Circuit board（FPC）.
Described control unit 401, moves along optical axis direction for controlling described camera lens module, makes light pass through camera lens mould
Block forms a hot spot in the photosurface of imageing sensor.The detector unit 402, for choosing on imageing sensor photosurface
At least two regions, according to the ratio and/or the ratio of the brightness at least two region of imageing sensor photosurface
Variable quantity, detects the position in the camera lens module relative image sensor photosensitive face.
In a particular embodiment, the detector unit 402, it may also be used for according to imageing sensor photosurface at least
The variable quantity of the ratio of the brightness in two regions, detects the movement velocity and the direction of motion of camera lens module.
In a particular embodiment, corner and central area of at least two described regions for imageing sensor photosurface.
Corner and the ratio and/or the ratio of the brightness of central area of the detector unit 402 according to imageing sensor photosurface
Variable quantity, detects the position in the camera lens module relative image sensor photosensitive face.
In a particular embodiment, when camera lens module is located between imageing sensor and focusing area, imageing sensor sense
Light face angle portion is partially located at outside the hot spot, and corner is k=g (A-c (H-dtan (ω with the ratio of the brightness of central area
2)))/S, wherein ω are the angles of visual field of camera lens module, and d is the relative distance of camera lens module and imageing sensor photosurface, and H is figure
As half image height of sensor, c is area coefficient of the imageing sensor photosurface corner positioned at the outer portion of hot spot, and g is that image is passed
Sensor photosurface corner and the relative illumination coefficient at center, A are the area of the imageing sensor corner chosen, and S is the figure chosen
As the area of sensor photosensitive face central area；When the camera lens module is from close to position away from imageing sensor, institute
State ratio accordingly to change from small to large.
In a particular embodiment, when camera lens module is located between focusing area and extraneous scene, and camera lens module and image
From closely, when remote change, the hot spot is completely covered the photosurface of imageing sensor, and imageing sensor to the distance of sensor
Brightness on photosurface tends to uniform, and the corner of described image sensor is corresponding to the ratio of the brightness of central area from small to large
Change.
In a particular embodiment, described control unit 401 can be additionally used in being passed according to the camera lens module relative image for detecting
The position of sensor photosurface, the move distance and the direction of motion of corresponding control camera lens module, into focusing area.
Another embodiment of the present invention additionally provides another kind of camera module, with the camera module in above-described embodiment
Distinguish, the control unit and detector unit in the detection means is the detection control unit of an integration.Such as Fig. 6
Shown, the detection control unit 601 can be placed in 101 chip internal of imageing sensor.As shown in fig. 7, the detection control
Unit 701 can also be placed on 101 chip exterior of imageing sensor the circuit substrate 702 same with image sensor chip.
The control detector unit is used to control the camera lens module along optical axis direction movement, makes light pass through the camera lens
Module forms a hot spot in the photosurface of described image sensor；And for choosing on the photosurface of described image sensor extremely
Few two regions, according to the variable quantity of the brightness ratio and/or the ratio at least two region, detect the camera lens mould
Position of the block with respect to the photosurface of described image sensor.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Instruct related hardware to complete with by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, without departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (11)
1. a kind of method for detecting position of camera module camera lens module, it is characterised in that the camera module includes：Image
Sensor, which includes photosurface；Camera lens module, detection method include：
The camera lens module is controlled, makes photosurface of the light by the camera lens module in described image sensor form a light
Spot；
At least two regions on the photosurface of described image sensor are chosen, according to the brightness ratio at least two region
And/or the variable quantity of the ratio, detect position of the camera lens module with respect to the photosurface of described image sensor；Wherein,
Corner and central area of at least two region for the photosurface of described image sensor, according to described image sensor
The brightness ratio and/or the variable quantity of the ratio in the corner and central area of photosurface, detects the camera lens module with respect to institute
State the position of the photosurface of imageing sensor.
2. the method for detecting position of camera module camera lens module according to claim 1, it is characterised in that also include：
According to the variable quantity of the brightness ratio at least two region, movement velocity and the motion side of the camera lens module are detected
To.
3. the method for detecting position of camera module camera lens module as claimed in any of claims 1 to 2, its feature
It is：When the camera lens module is located between described image sensor and focusing area, the photosurface of described image sensor
Corner be partially located at outside the hot spot, the corner is k=g (A-c (H-dtan with the ratio of the brightness of central area
(ω/2)))/S, wherein ω is the angle of visual field of camera lens module, and d is the relative distance of camera lens module and imageing sensor photosurface, H
It is half image height of imageing sensor, c is the area coefficient of the outer portion that imageing sensor photosurface corner is located at hot spot, and g is figure
As the relative illumination coefficient at sensor photosensitive face angle Bu Yu centers, A is the area of the imageing sensor corner chosen, and S is to choose
Imageing sensor photosurface central area area；When the camera lens module is away from imageing sensor, the ratio is corresponding
Change from small to large.
4. the method for detecting position of camera module camera lens module as claimed in any of claims 1 to 2, its feature
It is：When the camera lens module is located between focusing area and extraneous scene, and the camera lens module and described image sensor
Distance from closely to remote change when, described hot spot is completely covered the photosurface of described image sensor, described image sensor
Photosurface on brightness tend to uniform, the corner of described image sensor is corresponding to the brightness ratio of central area from small to large
Change.
5. the method for detecting position of camera module camera lens module as claimed in any of claims 1 to 2, its feature
It is also to include：It is according to the position of the photosurface of the relative described image sensor of the camera lens module for detecting, corresponding to control
The move distance and the direction of motion of camera lens module, into focusing area.
6. a kind of camera module, it is characterised in that include：Circuit substrate；
The imageing sensor of the circuit substrate is placed in, described image sensor includes：Photosurface；
Described image sensor is interval in, and is arranged at the camera lens module on described image sensor top；
The detection means of the circuit substrate is placed in, the detection means includes：
Control unit, moves along optical axis direction for controlling described camera lens module, light is passed in image by camera lens module
The photosurface of sensor forms a hot spot；
Detector unit, for choosing at least two regions on the photosurface of described image sensor, according to described at least two
The variable quantity of the brightness ratio in region and/or the ratio, detects that the camera lens module is photosensitive with respect to described image sensor
The position in face；Wherein, corner and central area of at least two described regions for imageing sensor photosurface.
7. camera module according to claim 6, it is characterised in that
The detector unit, for the variable quantity of the brightness ratio according at least two region, detects the camera lens mould
The movement velocity and the direction of motion of block.
8. the camera module according to any one in claim 6 to 7, it is characterised in that
When the camera lens module is located between described image sensor and focusing area, the photosurface of described image sensor
Corner is partially located at outside the hot spot, and the corner is k=g (A-c (H-dtan with the ratio of the brightness of central area
(ω/2)))/S, wherein ω is the angle of visual field of camera lens module, and d is the relative distance of camera lens module and imageing sensor photosurface, H
It is half image height of imageing sensor, c is the area coefficient of the outer portion that imageing sensor photosurface corner is located at hot spot, and g is figure
As the relative illumination coefficient at sensor photosensitive face angle Bu Yu centers, A is the area of the imageing sensor corner chosen, and S is to choose
Imageing sensor photosurface central area area；When the camera lens module is away from described image sensor, the ratio
Accordingly change from small to large.
9. the camera module according to any one in claim 6 to 7, it is characterised in that
When the camera lens module is located between focusing area and extraneous scene, and the camera lens module and described image sensor
From closely, when remote change, the hot spot is completely covered the photosurface of described image sensor, the sense of described image sensor to distance
Brightness on light face tends to uniform, and the corner of described image sensor is corresponding to the brightness ratio of central area to be become from small to large
Change.
10. camera module according to claim 6, it is characterised in that
Described control unit, for the position of the photosurface according to the relative described image sensor of the camera lens module for detecting
Put, accordingly control the move distance and the direction of motion of the camera lens module, into focusing area.
11. a kind of camera modules, it is characterised in that include：
Circuit substrate；
The imageing sensor of the circuit substrate is placed in, described image sensor includes：Photosurface；
Described image sensor is interval in, and is arranged at the camera lens module on described image sensor top；
The detection means of the circuit substrate is placed in, the detection means includes：
Control detector unit, is moved along optical axis direction for controlling the camera lens module, makes light be existed by the camera lens module
The photosurface of described image sensor forms a hot spot；And for choosing at least two on the photosurface of described image sensor
Region, according to the variable quantity of the brightness ratio and/or the ratio at least two region, detects that the camera lens module is relative
The position of the photosurface of described image sensor；Wherein, corner of at least two described regions for imageing sensor photosurface
And central area.
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| CN201410153063.0A CN103888675B (en) | 2014-04-16 | 2014-04-16 | The method for detecting position and camera module of camera module camera lens module |
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| CN103888675B true CN103888675B (en) | 2017-04-05 |
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| CN105451017A (en) * | 2015-12-29 | 2016-03-30 | 努比亚技术有限公司 | Camera module photosensitive quality detection method and device |
| CN105721753B (en) * | 2016-03-29 | 2020-06-23 | 联想(北京)有限公司 | Lens assembling method and lens assembling device |
| CN108259737A (en) * | 2016-12-29 | 2018-07-06 | 深圳超多维光电子有限公司 | Focus detection methods, device, computer readable storage medium and electronic equipment |
| CN108173993B (en) * | 2017-12-25 | 2020-03-24 | 维沃移动通信有限公司 | Camera module, control method and mobile terminal |
| CN111371967A (en) * | 2018-12-06 | 2020-07-03 | 格科微电子（上海）有限公司 | Method for improving image output performance of image sensor |
| CN112394525A (en) * | 2019-08-19 | 2021-02-23 | 上海鲲游光电科技有限公司 | Dimension-increasing information acquisition device and light homogenizing element and application thereof |
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