CN102809873A - Autofocus camera and camera-equipped mobile terminal - Google Patents
Autofocus camera and camera-equipped mobile terminal Download PDFInfo
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- CN102809873A CN102809873A CN201210182908XA CN201210182908A CN102809873A CN 102809873 A CN102809873 A CN 102809873A CN 201210182908X A CN201210182908X A CN 201210182908XA CN 201210182908 A CN201210182908 A CN 201210182908A CN 102809873 A CN102809873 A CN 102809873A
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- lens supports
- supports body
- directions
- detecting element
- lens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Abstract
An autofocus camera having a small simple construction and capable of detecting positions in an X direction and a Y direction perpendicular to an optical axis in a lens support with high precision, and a camera-equipped mobile terminal are disclosed. According to the autofocus camera, a current comparison value received from an image sensor is compared with a comparison value received in the past, and if the comparison value is at a maximum focusing point, the lens support moves in a Z direction. A comparison-position data for the measurement of the relationship between the comparison value received from the image sensor and the position of the lens support is provided. When the lens support is at a primary position, a focusing point position of the maximum comparison value is calculated from the comparison value received from the image sensor according to the comparison-position data, and a moving distance of the lens support in the Z direction is calculated. Magnetic detection signals received by an X-direction magnetic detection element and a Y-direction magnetic detection element are corrected corresponding to the moving distance of the lens support in the Z direction.
Description
Technical field
The present invention relates to the mobile terminal apparatus of a kind of relevant auto-focus camera and subsidiary camera.
Background technology
In patent document 1 (TOHKEMY 2010-85448 communique), disclosing has: in a kind of auto-focus camera; The lens supports body is that the Z direction is when moving to optical axis direction; After responding to the rolling dynamic sensor, the lens supports body moves to the X-Y direction orthogonal thereto with optical axis direction (directions X and Y direction).Disclosed in the technology of this patent document 1, movable maintaining part material is provided with the position probing magnetite; The lens supports body is provided with the magnetism detecting sensor; This situation that lens supports body position in directions X and the Y direction is detected through the magnetism sensor.
But; In the technology of patent document 1; When the lens supports body moves to the Z direction; The movable maintaining part material that is provided with the position probing magnetite moves to the Z direction with these 2 portion's materials that are provided with the lens supports body of magnetism detecting sensor together, so the driving force that moves to the Z direction will become greatly, device has the problem of maximization simultaneously.
On the other hand, movable relatively maintaining part material, only the lens supports body is in the Z direction moves, and according to moving of lens supports body, the distance between position probing magnetite and the magnetism sensor will change.Particularly when the magnetic field intensity of magnetism sensor position probing magnetite, the position detection accuracy of X-Y direction just has low problem.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of compact simplified formation and in the lens supports body, can detecting accurately and the optical axis auto-focus camera of the X-Y direction position of quadrature and the mobile terminal apparatus of subsidiary camera mutually.
A kind of auto-focus camera has: the lens supports body of support of lens; The lens supports physical efficiency is set to be reached and the directions X of optical axis direction quadrature and the fixed body that the Y direction moves to optical axis direction; The Z direction drive division that the lens supports body is moved to the optical axis direction of lens; The X-Y drive division that the lens supports body is moved to directions X and Y direction; Be arranged on lens supports body or fixed body directions X position probing magnetite and the Y direction position probing magnetite on one of them; Be arranged on above another with directions X position probing magnetite relatively to directions X magnetism detecting element and with Y direction position probing magnetite relatively to Y direction position magnetism detecting element; Be arranged on the portrait sensor on the lens supports body optical axis; From the portrait sensor receive the comparison signal after, move the polymerization focal point control portion that sends drive signal to Z direction drive division to the polymerization focal position for making the lens supports body; Detection signal based on directions X magnetism detecting element and Y direction position detecting element; Detect the directions X position and the Y direction position of lens supports body, the rolling dynamic sensor sends the X-Y control part of drive signal to the X-Y drive division for the rolling momentum of eliminating detected directions X and Y direction.Polymerization focal point control portion has from the portrait comparison value that receives of sensor and measures the ratio positional data that concerns between the Z direction position of lens supports body.When the lens supports body is in primary position; From the comparison value that the portrait sensor receives; Based on than positional data; Calculate out the polymerization focal position of comparison value when maximum, and the Z direction amount of movement that calculates the lens supports body from the primary position and the difference between the polymerization focal position of lens supports body.The magnetism detection signal that the X-Y control part receives directions X magnetism detecting element and Y direction magnetism detecting element place adapts with the Z direction amount of movement of the lens supports body that obtains through the calculation of polymerization focal point control portion and to proofread and correct.
In aforesaid auto-focus camera; The Z drive division is connected to reception from the polymerization focal point control portion of the comparison signal that transmits of portrait sensor; Portion receives drive signal from the polymerization focal point control; Polymerization focal point control portion is provided with comparison comparison portion, data store and shift position and calculates portion, and on the data store, the lens supports body is stored in the measured data and the comparison-position data of each locational comparison than relation; The X-Y control part has and detects the lens supports body in the directions X position and the X-Y position detection part of Y direction position, detect Z position detection part and the X-Y position correction portion of lens supports body in Z direction position; The signal of calculating that the Z position detection part is calculated through the shift position portion of calculating of polymerization focal point control portion detects the position of lens supports body in the Z direction; X-Y position correction portion detects X-Y position from the detected lens supports body of X-Y position detection part at the position detection signal of X-Y direction through receiving, and X-Y position correction portion proofreaies and correct the output of the position detection signal of X-Y position in Z direction positional information according to the lens supports body of Z position detection part
Being characterized as of a kind of auto-focus camera has: the lens supports body of support of lens; The lens supports physical efficiency is set to be reached and the directions X of optical axis direction quadrature and the fixed body that the Y direction moves to optical axis direction; The Z direction drive division that the lens supports body is moved to the optical axis direction of lens through circulating current; The X-Y drive division that the lens supports body is moved to directions X and Y direction; Be arranged on lens supports body or fixed body directions X position probing magnetite and the Y direction position probing magnetite on one of them; Be arranged on above another with directions X position probing magnetite relatively to directions X magnetism detecting element and with Y direction position probing magnetite relatively to Y direction position magnetism detecting element; Be arranged on the portrait sensor on the lens supports body optical axis; From the portrait sensor receive the comparison signal after, move the polymerization focal point control portion that sends drive signal to Z direction drive division to the polymerization focal position for making the lens supports body; Detection signal based on directions X magnetism detecting element and Y direction position detecting element; Detect the directions X position and the Y direction position of lens supports body, the rolling dynamic sensor sends the X-Y control part of drive signal to the X-Y drive division for the rolling momentum of eliminating detected directions X and Y direction.After polymerization focal point control portion compares from portrait sensor existing comparison value that receives and the comparison value that receives in the past; For the comparison value is drawn close to the polymerization focal position of maximum; Then can send drive signal to Z direction drive division, the lens supports body moves to the Z direction.Z direction drive division has when the lens supports body is in the polymerization focal position, the electric current-position data that concerns between electric current that circulates on the mensuration Z direction drive division and the shift position.Based on electric current-position data from polymerization focal position circulating current; Calculate out the Z direction position of lens supports body; The magnetism detection signal that the X-Y control part receives directions X magnetism detecting element and Y direction magnetism detecting element adapts with the Z direction amount of movement of the lens supports body that obtains through the calculation of polymerization focal point control portion and to proofread and correct.
In aforesaid auto-focus camera; On Z direction drive division, the shift position is set and calculates portion; Electric current-the position data that concerns between electric current that circulates on the mensuration Z of the shift position portion of the calculating direction drive division and the shift position; Based on electric current-position data, calculate out the Z direction position of lens supports body from polymerization focal position circulating current; The X-Y control part has and detects the lens supports body in the directions X position and the X-Y position detection part of Y direction position, detect Z position detection part and the X-Y position correction portion of lens supports body in Z direction position; Through X-Y position correction portion, proofread and correct detected detection position according to directions X magnetism detecting element and Y direction magnetism element the Z direction position of the lens supports body that this shift position portion of calculating of Z position detection part reception.
The mobile terminal apparatus of subsidiary camera is characterized as, and is equipped with the aforesaid auto-focus camera of claim.
Mobile terminal apparatus is meant mobile phone, portable data assistance (PDA), notebook computer etc.
During the position, the portrait sensor is performed calculations to the polymerization focal position according to the ratio positional data of surveying or simulating in the past by the comparison value place that receives the lens supports body, just can calculate the amount of movement of lens supports body on the Z direction in the early stage.The comparison value for example compares to the ratio of intensity during the polymerization focal position.Strong and weak through the comparison value, calculate out from than the relevant distance that begins till the polymerization focal position of positional data.
Therefore; According to lens supports body moving to the Z direction; Because the distance between directions X position probing magnetite and the directions X magnetism detecting element can change; Even if the detected magnetic field intensity of directions X magnetism detecting element has produced variation, after this intensity being proofreaied and correct, just can high Precision Detection go out the directions X position corresponding to the Z direction amount of movement that calculates.Equally; About the Y direction; Move to the Z direction according to the lens supports body, owing to the distance between Y direction position probing magnetite and the Y direction magnetism detecting element can change, even if the detected magnetic field intensity of Y direction magnetism detecting element changes; Z direction amount of movement corresponding to calculating is proofreaied and correct this intensity, just can detect Y direction position accurately.
Like this, according to the position that detects lens supports body X-Y direction accurately,, when the lens supports body moves to the X-Y direction, can carry out high-precision rolling NMO correction for rocking of camera proofreaied and correct.
According to the present invention, for detecting moving of lens supports body Z direction, because do not want Z direction position probing magnetite and Z direction magnetism detecting element, so the while simple in structure, cost also can be cheap.
Because only make the lens supports body that is provided with directions X position probing magnetite and Y direction position probing magnetite move direction to Z; So; As the technology in the patent document 1, the fixed body that is provided with directions X magnetism detecting element and Y direction magnetism detecting element also just need not to have driven to the Z direction.So, being compared to patent document 1, the load of Z direction drive division just can reduce, and can accomplish small-sized and simple in structure.
The lens supports body is after the Z direction moves, and the current value during from the polymerization focal position just can calculate out the Z direction position of lens supports body according to Z side's amount of movement calculation part electric current-position data.
Therefore; Move to the Z direction according to the lens supports body; Because the distance between directions X position probing magnetite and the directions X magnetism detecting element can change; Even if the detected magnetic field intensity of directions X magnetism detecting element has produced variation,, just can high Precision Detection go out the directions X position according to detected intensity being proofreaied and correct corresponding to Z direction position.Even about the Y direction; Move to the Z direction according to the lens supports body; Because the distance between Y direction position probing magnetite and the Y direction magnetism detecting element can change; Even if the detected magnetic field intensity of Y direction magnetism detecting element changes, corresponding to Z direction amount of movement magnetic field intensity is proofreaied and correct, just can detect Y direction position accurately.
In view of the above, for rocking of camera proofreaied and correct,, can shake NMO correction accurately even the lens supports body moves occasion to the X-Y direction.
According to the present invention, for detecting the lens supports body, need not Z direction position probing magnetite and Z direction magnetism detecting element to the moving of Z direction, so constitute simultaneously simple, the cost cheapness.
Because only make the lens supports body that is provided with directions X position probing magnetite and Y direction position probing magnetite move direction to Z; So; As the technology in the patent document 1, the fixed body that is provided with directions X magnetism detecting element and Y direction magnetism detecting element also just need not to have driven to the Z direction.So, being compared to patent document 1, the load of Z direction drive division just can reduce, and can accomplish small-sized and simple in structure.
Description of drawings
[Fig. 1] is the drive control module figure in the relevant auto-focus camera of the 1st example.
[Fig. 2] (a) be when taken the photograph body and camera to the occasion that is in certain distance under, shown draw a portrait comparison ratio that sensor receives and and the polymerization focal position till between the synoptic diagram of distance relation.(b) comparison in the position in the early stage of lens supports body than and till the polymerization focal position between the comparison-position data figure of distance relation.
[Fig. 3] is the horizontal sectional view of the lens driver of relevant the 1st example.
[Fig. 4] is the longitudinal section that the auto-focus camera in the 1st example cuts from the angle of 90 degree.
[Fig. 5] is the planimetric map that concerns between each magnetism detecting element and the position probing magnetite in the 1st example.
[Fig. 6] is the exploded perspective view of relevant the 1st example lens driver.
[Fig. 7] is the lens driver outward appearance oblique view of relevant the 1st example.
[Fig. 8] is the drive control module in the auto-focus camera of relevant the 2nd example.
[Fig. 9] is to be the electric current-position data figure that concerns between the Z direction position of flow-thru electrode flow valuve and lens supports body on the 1st coil.
[Figure 10] displayed map that to be the directions X magnetite concern between Z direction displacement with the directions X magnetite to the output of the amount of movement of directions X and directions X magnetism detecting element.
[explanation of Reference numeral]
1 lens driver
2 auto-focus cameras
3 collar extensions
5 lens supports bodies
32 Z drive divisions
33 X, one Y drive division
34 close focal point control portion
38 X, one Y control part
38a X one Y position detection part
38b Z position detection part
38c X one Y position detection part
37 rolling dynamic sensors
43 directions X position probing magnetites
45 Y direction position probing magnetites
49 directions X magnetism detecting elements
51 Y direction magnetism detecting elements
Embodiment
Below, with reference to figures 1 through Fig. 7, the 1st example of the present invention is specified.Auto-focus camera 2 in the 1st example is for being assembled into the auto-focus camera in the mobile phone.As shown in Figure 1, this auto-focus camera 2 possesses and is arranged at lens driver 1 and lens knot as portrait sensor on the side 31 and control part 30.
The outer peripheral sidewall 3a of collar extension 3 looks sideways in the past and slightly is quadrangle.Four jiaos bight 3b is chamfer shape.Be provided with the peristome of configuration lens supports body 5 at the central part of collar extension 3.
Like Fig. 6 and shown in Figure 3, on each bight 3b of the outer peripheral sidewall 3a of collar extension 3, be provided with and extend to driving with the interior all sidewall 3c on interior all sides of magnetite 17.In all sidewall 3c be configured on interior all sides of coil case 4.In addition, among Fig. 3, interior all sidewall 3c of collar extension 3 have been omitted.
As shown in Figure 3, each drives looks its plane sideways with 17 the pasts of magnetite and slightly is trapezoidal shape along the chamfering bight 3b of collar extension 3.In it all sides be along after state the circular-arc of the 1st coil 19 outer peripheral faces.In addition, drive with the magnetic pole of interior all sides of magnetite 17 and outer circumferential side differently, for example, interior all sides are that the N utmost point, outer circumferential side are the S utmost point.
As shown in Figure 6, the slightly cylindrical shape of lens supports body 5, all sides are provided with the peristome of fixed lens (not having diagram) in it.The coil 4 that is fixed on the periphery of lens supports body 5 is to be made up of the 1st coil the 19, the 2nd coil 16a, 16b, 16c, 16d.
When the 1st coil 19 is circular around the whole peripheral surface of the Zhou Fangxiang of lens supports body 5, present band shape.
Further, like Fig. 6 and shown in Figure 3, on the periphery of the 1st coil 19,4 the 2nd coil 16a～16d add up to uniformly-spaced (intervals of 90 degree) on Zhou Fangxiang and are configured to 4.As shown in Figure 6, each the 2nd coil 16a～16d looks its side sideways in the form of a ring respectively outside lens supports body radial direction, and on the direction that constitutes ring, reeling forms coil.
Each the 2nd coil 16a～16d overlay configuration is on the outer peripheral face of the 1st coil 19.Front side edge portion 22, back side edge portion 25 and left and right sides side portion 24,26 are overlapped in the 1st coil 19.
In addition, each drives with magnetite 17 behind the 2nd coil 16a～16d that gets involved the opposite, with the 1st coil 19 subtends.
As shown in Figure 3; The 2nd coil 16a, 16c are last; According to the electric current that drives with the magnetic force of magnetite 17 and the 2nd coil 16a, the last circulation of 16c; Thrust E will act on the radial direction of lens supports body 5, the 2nd coil 16b, 16d too, thrust F will act on the radial direction of lens supports body 5.Thrust E and thrust F are mutually orthogonal.
In addition, in this example, the 2nd coil 16a and 16c drive to thrust F direction through the 2nd coil 16b and 16d on the direction of thrust E.
As shown in Figure 6, be tabular under the state of nature of front side spring 9 before assembling.It is by the periphery sidepiece 9a of the rectangular ring-type in plane, is disposed at that the plane on week in the periphery sidepiece 9a is interior all sidepiece 9b of circular shape, 4 each the wrist 9c that connect periphery sidepiece 9a and interior all sidepiece 9b constitute.On Z direction and X-Y direction, can comfortable be out of shape.
Be tabular under the state of nature of rear side spring 15 before assembling.It is by the periphery sidepiece 11a of the rectangular ring-type in plane, is disposed at that the plane on week in the periphery sidepiece 11a is interior all sidepiece 11b of circular shape, 4 each the wrist 11c that connect periphery sidepiece 11a and interior all sidepiece 11b constitute.
The outer circumferential side 9a of front side spring 9 is clamped between framework 7 and the collar extension 3, and interior all sidepiece 9b are fixed on the front end of lens supports body 5.The periphery sidepiece 11a of rear side spring 11 is clamped between base 8 and the rear side pad 15.In all sidepiece 11b be fixed on the rear end of lens supports body 5.In view of the above, lens supports body 5 can support at optical axis direction (Z direction) and X-Y direction according to front side spring 9 and rear side spring 11 with moving freely.
According to the electrical current on the 1st coil 19; Lens supports body 5 is in case move to optical axis direction the place ahead, lens supports body 5 will the precompression of the fore-and-aft direction of front side spring 9 and rear side spring 11 make a concerted effort and the 1st coil 19 and magnetite 17 between produce electromagnetic force phase equilibrium locations the time slack.
When lens supports body 5 moves to the X-Y direction; The 2nd coil 16a～16d of Xiang Suoding passes to the electric current of certain value, the spring of the X-Y direction of front side spring 9 and rear side spring 11 make a concerted effort with the corresponding magnetite 17 of the 2nd coil 16a～16d between the electromagnetic force that produced slack during equilibrium locations mutually.
Next, the position probing assembly 41 that the position of directions X, Y direction and the Z direction of the fixed body of relative lens supports body 5 is detected describes.Like Fig. 4～shown in Figure 6, position probing assembly 41 has the directions X position probing magnetite 43 and the Y direction position probing magnetite 45 that are arranged on the lens supports body 5, is fixed on directions X magnetism detecting element 49 and Y direction magnetism detecting element 51 on the base 8.
As shown in Figure 4, each position probing magnetite 43,45 is fixed on the rearward end of lens supports body 5, and directions X position probing magnetite 43 is arranged on the Y direction end of lens supports body 5.Y direction position probing magnetite 45 is arranged on the directions X end of lens supports body 5.Directions X position probing magnetite 43 is spent arranged spaced at Zhou Fangxiang 90 each other with Y direction position probing magnetite 45.
Directions X position probing magnetite 43 is 2 utmost point magnetites.The S utmost point and the N utmost point of different magnetic poles each other magnetize on directions X.Equally, Y direction position probing magnetite 43 different magnetic poles each other that on the Y direction, magnetized.Each magnetite 43,45 is adopted as the slightly congener of same size, identical weight.
Each magnetism detecting element 49,51 is a Hall element.Be arranged on each circuit substrate 55, simultaneously, each magnetism detecting element 49,51 be arranged on the institute corresponding magnetite 43,45 relatively on the position.Circuit substrate 55 its planes slightly are the L font, and are fixed on the base 8 after the rear end subtend configuration of lens supports body 5.In addition, as shown in Figure 7, output end 57 extensions of circuit substrate 55 are installed on the outer circumferential side of base 8.
As shown in Figure 6, on lens supports body 5,, be fixed with 2 weights 59 for making the balanced with 2 position probing magnetites 43,45.In this example, weight 59 adopts the magnetite with position probing magnetite 43,45 same item.
In addition, as shown in Figure 5, directions X position probing magnetite 43 and Y direction position probing magnetite 45 to the real sensor of each self-corresponding magnetism detecting element 49,51 partly have enough big area.For example, even lens supports body 5 moves to directions X, Y direction magnetism detecting element 51 can detect the Y direction position of Y direction position probing magnetite 45.
Each position probing magnetite 43,45 and weight 59 are configured on the spatial portion 13 corresponding positions with collar extension 3.
Next, with reference to figure 1 and Fig. 2, the control part 30 of lens supports body 5 is described.
Such shown in Fig. 1 pattern, the 1st coil 19 is connected on the Z drive division 32, and each the 2nd each coil 16a～16d is connected on the X-Y drive division 33, from feed the electric current of certain value corresponding to the drive division 32,33 of each coil 19,16a～16d.
When so Fig. 2 (a) lens supports body is positioned at primary position, be the comparison-position data shown in Fig. 2 (b) to Z direction position (displacement) from comparison lens supports body 5 when trying to achieve the polymerization focus.
On the other hand, X-Y drive division 33 is connected on the X-Y control part 38.The rolling dynamic sensor 39 of spiral shell appearance sensor etc. is connected on the X-Y control part 38.X-Y control part 38 receive from rolling dynamic sensor 39 transmit rock signal after, according to rocking signal,,, send drive signal to X-Y drive division 33 for eliminating the rolling momentum to X-Y position mobile lens supporter 5.
Further; In the polymerization focal point control portion 34 on the Z drive division 32; The radio-frequency component (comparison) that portrait sensor 31 places are received compares one by one, receives after the drive signals to the 1st coil electricity from polymerization focal point control portion 34, and lens supports body 5 is compared high peak position and moved to being in.
In addition, X-Y control part 38 is behind the detection signal that receives rolling dynamic sensor 39, and the rolling momentum of calculating directions X and Y direction sends drive signal according to calculating the result to X-Y drive division 33.
On X-Y drive division 33,, be that lens supports body 5 moves to the E direction to the 2nd coil 16a and the logical electric current E that goes up of 16c; Feed electric current F to the 2nd coil 16b and 16d, make lens supports body 5 move direction to F.In view of the above, lens supports body 5 moves to the E-F direction and proofreaies and correct.
In addition, as shown in Figure 3, what symbol E, F represented is thrust direction that electric current produced and the size according to circulation.In this example, directions X is for look an edge direction of the collar extension 3 that is square shape sideways in the past.The Y direction is for look the direction of the adjacent edge of the collar extension 3 that is square shape sideways in the past.The thrust E, the F that are produced on the diagonal about collar extension 3, the component EX of directions X and FX's and as the thrust of directions X, the component EY of Y direction and FY are as the thrust of Y direction and work.The component sum EY_FY that becomes directions X thrust, each Y direction for the component sum EX+FX that makes each directions X at X-Y drive division 33 becomes Y direction thrust and controls.
Feed electric current lens supports body 5 is moved to directions X and Y direction, feed electric current than the bigger amount of movement of desired value.Directions X magnetism detecting element 49 and Y direction magnetism detecting element 51 detect whether arrive at the target location, feed and keep the current value of this position, and the lens supports body stops at directions X and the mobile of Y direction.
Next, effect and the effect to the auto-focus camera 1 of relevant example of the present invention describes.
The auto-focus camera 2 that this example is relevant does; In polymerization focal point control portion 34; The radio-frequency component (comparison) that receives from portrait sensor 31 compares one by one, sends drive signal to Z drive division 32, and lens supports body 5 carries out straight line to polymerization focal position Z direction and moves.
Lens supports body 5 when the Z direction moves as straight line, according to feeding current value Z to the 1st coil 19, with the precompression of the electromagnetic force that produces between the magnetite 17 and front side spring 9 and rear side spring 11 make a concerted effort to be in equilibrium locations the time stop.
At this, the relation between the position of the position of X-Y direction and Z direction is described.For example, the directions X magnetism of directions X magnetism detecting element 49 detects magnetite 43 in case move to directions X, and it detects output because of low, so according to its output valve, can detect the position when directions X moves.The position (amount of movement) of directions X magnetism detecting element 49 and the relation that detects output do, directions X magnetism magnetite 43 moves the direction to Z, and detecting output also can be low.That is, shown in figure 10, with respect to the directions X magnetism magnetite 43 of directions X magnetism detecting element 49 on the Z direction apart from E1 away from occasion, be output as at 1 o'clock, just moved 1mm on the directions X.Directions X magnetism magnetite 43 relative directions X magnetism detecting elements 49 when on the Z direction, being in than the farther E2 position of E1, are output as 0.5 occasion, become be in 1mm away from the position.The occasion of E3 is output as 0.3 occasion, become be in 1mm away from the position.In view of the above, the output of directions X magnetism detecting element 49 is necessary to proofread and correct corresponding to the Z direction position of lens supports body 5.About the Y direction also is same.
So, corresponding to the Z direction amount of movement of lens supports body 5,49 pairs of magnetism detection signals that received of directions X magnetism detecting element are proofreaied and correct, and can correctly hold the directions X position.In other words; Lens supports body 5 from portrait sensor 1 away from the time move to the Z direction, directions X magnetism detecting element 49 relatively will move away from the lens supports body for making directions X position probing magnetite 43; So the detection sensitivity of directions X magnetism detecting element 49 will be low.Therefore, the position of the Z direction of respective lens supporter 5 according to the output of directions X magnetism detecting element 49 is proofreaied and correct, just can correctly detect the directions X position.
Equally, even lens supports body 5 moves on the Y direction,, after the Y sense of direction position of lens supports body 5 is detected, export to X-Y control part 38 according to the magnetic field intensity of Y direction magnetism detecting element 51 detected Y direction position probing magnetites 45.In the X-Y control part; X-Y position detection part 38a calculates out Y direction position according to detecting sensitivity; Even in Y direction magnetism detecting element 51 and directions X magnetism detecting element 49 same, Z position detection part 38b corresponds to the Z direction position of detected lens supports body 5; According to of the correction of Y direction magnetism detecting element 51 detected output valves, just can correctly detect Y direction position through the X-Y position correction 38c of portion.
Therefore; In the polymerization focal point control portion 34; Portion 37 is calculated based on the comparison-position data (Fig. 2 (b)) that is stored in the data store 36 in the shift position; Calculate out lens supports body 5 and begin to move to the distance till the B1 of polymerization focal position from comparison signal A1 during the position in the early stage, as Z direction displacement to lens supports body 5.The X-Y position correction 38c of portion that Z direction displacement signal that portion 37 calculates out is transported to X-Y control part 38 is calculated in the shift position.
The X-Y control part 38 of lens supports body 5 receives the rolling momentum signal of the X-Y direction at rolling dynamic sensor 37 places; Rolling dynamic correction value (eliminating the correcting value of rolling momentum) to directions X and Y direction performs calculations; Determine target location E, F (X, Y) that lens supports body 5 should move respectively, switch on to the 2nd coil 16a, 16c and the 2nd coil 16b, 16d from X-Y drive division 33.
Then, detect according to the magnetic flux of 49 pairs of directions X positions of directions X magnetism detecting element magnetite 43, detect the directions X position of lens supports body 5,38a exports to the X-Y of X-Y control part 38 position detection part.
In addition, in X-Y control part 38, calculate the Z direction amount of movement of the lens supports body 5 that portion 37 calculated from the shift position of polymerization focal point control portion 34, the detected positional information of X-Y position detection part of the X-Y position correction 38c of portion is proofreaied and correct.
Lens supports body 5 is provided with directions X position probing magnetite 43 and Y direction position probing magnetite 45; The magnetism detecting element 49,51 that corresponds respectively to these and be provided with detects the magnetic field of each position probing magnetite 43,45; On the target location E that rolling dynamic sensor 37 detected rolling momentum are eliminated, the F (X, Y), detect lens supports body 5 and whether moved.In view of the above, the rolling NMO correction of lens supports body 5 can correctly and rapidly be carried out.
The X-Y direction position of lens supports body 5 just can be detected through the magnetism detecting element 49,51 that is arranged at the position probing magnetite 43,45 on the lens supports body 5 and be arranged on the base 8, so structure is small-sized and simple.
In addition, magnetite and magnetism detecting element that the Z direction position probing of lens supports body 5 does not adopt Z direction position probing to use are according to the comparison-position data of surveying in advance, the shift position of calculating the Z direction.So, can provide portion's article to count less, constitute simple and cheap auto-focus camera.
After the Z direction position of lens supports body 5 performed calculations; The amount of movement of the lens supports body 5 that obtains based on calculation; Detected value to directions X magnetism detecting element 49 and Y direction magnetism detecting element 51 is proofreaied and correct, so the rolling NMO correction of lens supports body 5 can correctly be carried out.
Lens supports body 5 is according to the electromagnetic force behind the 1st coil 19 and the 2nd coil 16a～16d circulating current, and optical axis direction and X-Y direction just move and can carry out, and has realized the driving of lens supports body 5 with compact formation.
Each position probing magnetite 43,45 and weight 59,59 are configured in collar extension 3 spatial portions 13 pairing positions, so each position probing magnetite 43,45 and weight 59,59 can prevent to be adsorbed on the collar extension 3 when lens driver 1 assembling when action.
Directions X magnetism detecting element 49 and Y direction magnetism detecting element 51 be because be arranged on 1 circuit substrate 55,1 circuit substrate 55 only is fixed on the base 8 that constitutes a fixed body part just passable, so assembling is easier to.
On lens supports body 5, be provided with weight 59,59, between directions X position probing magnetite 43 and the Y direction position probing magnetite 45, it is balanced that weight reaches, and the mobile of lens supports body 5 can very smooth and easyly carry out.
Be stored in the comparison-position data in the data store 36, can utilize the storage data that are stored in advance in indivedual auto-focus cameras, carry out the rolling NMO correction of individual difference.
Below other example of the present invention is described, in the example of following explanation, as play with the part of above-mentioned the 1st example same function effect and then explain with same-sign, omit the explanation of its part.Below, main being noted that and the 1st example difference.
With reference to figure 8 and Fig. 9, the auto-focus camera 2 of the 2nd example is described.In this 2nd example, the shift position in the Z direction of lens supports body 5 is calculated portion 37 and is not arranged in the polymerization focal point control portion 34, is arranged on the Z direction drive division 32, and this point is different in the 1st example.Calculate in the portion shift position, and that kind as shown in Figure 9 to the energising of the 1st coil 19, is surveyed out the relation data between the displacement of lens supports body 5 in advance, according to the current value I 1 to 19 energisings of detected the 1st coil, calculates out stroke (displacement) B3.The position of the lens supports body 5 that this shift position portion of calculating of Z position detection part 38b reception of X-Y control part 38; Through the X-Y position correction 38c of portion of X-Y control part 38, proofread and correct according to directions X magnetism detecting element 49 and 51 pairs of detected detection positions of Y direction magnetism element.
According to this 2nd example, can play the action effect identical with the 1st example.
The invention is not restricted to above-mentioned example, only otherwise breaking away from purport of the present invention can do all distortion in allowed band.Such as; In the 1st and the 2nd example; The driving of the Z direction of lens supports body 5, directions X and Y direction is not limited to the 1st coil 19 and the 2nd coil 16a～16d energising; Can according to each motor, can drive at the motor that mobile lens supporter 5 is set on all directions to directions X, Y direction and Z direction.
In the 1st and the 2nd example, the 2nd coil 16a～16d and magnetite 17 are not limited on each bight 3b of collar extension 3, also can on mutual Zhou Fangxiang, vacate the interval of 90 degree.
The 2nd coil 16a～16d vacates at interval with 90 degree each other, only is arranged to adjacent 2.
The 2nd coil 16a～16d also can be configured in interior all sides of the 1st coil 19.
In above-mentioned example, lens supports body 5 can move to the Z direction corresponding to zoom ratio after keeping zoom lens.
(Fig. 2 (b) and current value-position data (with reference to figure 9) are not restricted in advance the data to each actual measurement to be stored in comparison-position data in the polymerization focal point control portion 34; Also can store the data of each institute's order position (such as lot number) actual measurement, also can be the data of simulation.These data, the deviation of every group is less, so there is no need and must survey each group, manufacturing also is easier to.
The X of position detecting element, Y direction magnetism detecting element 49,51 and can be the point symmetry position configuration by the X of position detecting element, Y direction position probing magnetite 2 groups.
Position detecting element X, Y direction magnetism detecting element 49,51 be as Hall element, by position detecting element X, Y direction position probing magnetite 43,45 as 2 utmost point magnetites.Such as, can be MR element and multipole magnetite.
In addition, X, Y direction magnetism detecting element 49,51 can be fixed on the lens supports body 5, and X, Y direction position probing magnetite 43,45 can be fixed on the base 8.
Claims (5)
1. auto-focus camera comprises
The lens supports body of support of lens;
Being used to be provided with the lens supports physical efficiency reaches and the directions X of optical axis direction quadrature and the fixed body that the Y direction moves to optical axis direction;
The Z direction drive division that the lens supports body is moved to the optical axis direction of lens, the X-Y drive division that the lens supports body is moved to directions X and Y direction;
Be arranged on lens supports body or fixed body directions X position probing magnetite and the Y direction position probing magnetite on one of them;
Be arranged in lens supports body or the fixed body above another with directions X position probing magnetite relatively to directions X magnetism detecting element and with Y direction position probing magnetite relatively to Y direction position magnetism detecting element;
Be arranged on the portrait sensor on the lens supports body optical axis;
From the portrait sensor receive the comparison signal after, move the polymerization focal point control portion that sends drive signal to Z direction drive division to the polymerization focal position for making the lens supports body;
Detection signal based on directions X magnetism detecting element and Y direction position detecting element; Detect the directions X position and the Y direction position of lens supports body, for elimination rock sensor to the rolling momentum of directions X and Y direction send the X-Y control part of drive signal to the X-Y drive division;
It is characterized in that,
Polymerization focal point control portion has from the portrait comparison value that receives of sensor and measures the ratio positional data that concerns between the Z direction position of lens supports body; When the lens supports body is in primary position; From the comparison value that the portrait sensor receives; Based on than positional data; Calculate out the polymerization focal position of comparison value when maximum, and the Z direction amount of movement that calculates the lens supports body from the primary position and the difference between the polymerization focal position of lens supports body; The magnetism detection signal that the X-Y control part receives directions X magnetism detecting element and Y direction magnetism detecting element place adapts with the Z direction amount of movement of the lens supports body that obtains through the calculation of polymerization focal point control portion and to proofread and correct.
2. auto-focus camera as claimed in claim 1; It is characterized in that; The Z drive division is connected to reception from the polymerization focal point control portion of the comparison signal that transmits of portrait sensor, and portion receives drive signal from the polymerization focal point control, and polymerization focal point control portion is provided with and compares comparison portion, data store and shift position and calculate portion; On the data store, the lens supports body is stored in the measured data and the comparison-position data of each locational comparison than relation; The X-Y control part has and detects the lens supports body in the directions X position and the X-Y position detection part of Y direction position, detect Z position detection part and the X-Y position correction portion of lens supports body in Z direction position; The signal of calculating that the Z position detection part is calculated through the shift position portion of calculating of polymerization focal point control portion detects the position of lens supports body in the Z direction; X-Y position correction portion detects X-Y position from the detected lens supports body of X-Y position detection part at the position detection signal of X-Y direction through receiving, and X-Y position correction portion proofreaies and correct the output of the position detection signal of X-Y position in Z direction positional information according to the lens supports body of Z position detection part.
3. auto-focus camera is characterized in that having:
The lens supports body of support of lens;
The lens supports physical efficiency is set to be reached and the directions X of optical axis direction quadrature and the fixed body that the Y direction moves to optical axis direction;
The Z direction drive division that the lens supports body is moved to the optical axis direction of lens through circulating current;
The X-Y drive division that the lens supports body is moved to directions X and Y direction;
Be arranged on lens supports body or fixed body directions X position probing magnetite and the Y direction position probing magnetite on one of them;
Be arranged on lens supports body or fixed body wherein above another with directions X position probing magnetite relatively to directions X magnetism detecting element and with Y direction position probing magnetite relatively to Y direction position magnetism detecting element;
Be arranged on the portrait sensor on the lens supports body optical axis;
From the portrait sensor receive the comparison signal after, move the polymerization focal point control portion that sends drive signal to Z direction drive division to the polymerization focal position for making the lens supports body;
Detection signal based on directions X magnetism detecting element and Y direction position detecting element; Detect the directions X position and the Y direction position of lens supports body, for elimination rock sensor to the rolling momentum of directions X and Y direction send the X-Y control part of drive signal to the X-Y drive division;
It is characterized in that,
After polymerization focal point control portion compares from portrait sensor existing comparison value that receives and the comparison value that receives in the past; For the comparison value is drawn close to the polymerization focal position of maximum; Send drive signal to Z direction drive division; The lens supports body moves to the Z direction, and Z direction drive division has when the lens supports body is in the polymerization focal position, the electric current-position data that concerns between electric current that circulates on the mensuration Z direction drive division and the shift position; Based on electric current-position data from polymerization focal position circulating current; Calculate out the Z direction position of lens supports body, the magnetism detection signal that the X-Y control part receives directions X magnetism detecting element and Y direction magnetism detecting element adapts with the Z direction amount of movement of the lens supports body that obtains through the calculation of polymerization focal point control portion and to proofread and correct.
4. auto-focus camera as claimed in claim 3; It is characterized in that; On Z direction drive division, the shift position is set and calculates portion; Electric current-the position data that concerns between electric current that circulates on the mensuration Z of the shift position portion of the calculating direction drive division and the shift position based on the electric current-position data from polymerization focal position circulating current, is calculated out the Z direction position of lens supports body; The X-Y control part has and detects the lens supports body in the directions X position and the X-Y position detection part of Y direction position, detect Z position detection part and the X-Y position correction portion of lens supports body in Z direction position; Through X-Y position correction portion, proofread and correct detected detection position according to directions X magnetism detecting element and Y direction magnetism element the Z direction position of the lens supports body that this shift position portion of calculating of Z position detection part reception.
5. the mobile terminal apparatus of a subsidiary camera is characterized in that: the auto-focus camera that is equipped with each record in the claim 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081957.2A CN105527779B (en) | 2011-06-02 | 2012-06-04 | The mobile terminal of auto-focusing camera and having camera |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011124022A JP5857322B2 (en) | 2011-06-02 | 2011-06-02 | Autofocus camera and mobile terminal with camera |
| JP2011-124022 | 2011-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610081957.2A Division CN105527779B (en) | 2011-06-02 | 2012-06-04 | The mobile terminal of auto-focusing camera and having camera |
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| CN102809873B CN102809873B (en) | 2016-02-24 |
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| CN2012202606807U Withdrawn - After Issue CN202916568U (en) | 2011-06-02 | 2012-06-04 | Auto-focusing camera and mobile terminal with same |
| CN201210182908.XA Active CN102809873B (en) | 2011-06-02 | 2012-06-04 | The mobile terminal of auto-focus camera and having camera |
| CN201610081957.2A Active CN105527779B (en) | 2011-06-02 | 2012-06-04 | The mobile terminal of auto-focusing camera and having camera |
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| CN (3) | CN202916568U (en) |
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| CN108603994A (en) * | 2015-11-30 | 2018-09-28 | 旭化成微电子株式会社 | Driving device, lens unit, equipment, bearing calibration and program |
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| JP5857322B2 (en) * | 2011-06-02 | 2016-02-10 | 新シコー科技株式会社 | Autofocus camera and mobile terminal with camera |
| JP2014126668A (en) | 2012-12-26 | 2014-07-07 | Mitsumi Electric Co Ltd | Lens drive device, camera module and portable terminal with camera |
| KR102232029B1 (en) | 2014-03-17 | 2021-03-26 | 엘지이노텍 주식회사 | Lens moving unit and camera module having the same |
| KR102376814B1 (en) * | 2014-03-17 | 2022-03-21 | 엘지이노텍 주식회사 | Lens moving unit and camera module having the same |
| EP3168667B1 (en) * | 2014-07-11 | 2021-09-01 | Mitsumi Electric Co., Ltd. | Lens driving device, camera module, and camera mounting device |
| JP2016048383A (en) * | 2015-11-05 | 2016-04-07 | 新シコー科技株式会社 | Auto-focus camera, lens drive device, and mobile terminal device |
| CN110750023A (en) * | 2019-09-11 | 2020-02-04 | 瑞声科技(新加坡)有限公司 | Lens module and electronic equipment |
| KR102313463B1 (en) * | 2019-12-12 | 2021-10-19 | 주식회사 동운아나텍 | Apparatus and method for controlling a slope of a camera lens |
| KR102510574B1 (en) * | 2021-03-19 | 2023-03-16 | 엘지이노텍 주식회사 | Lens moving unit and camera module having the same |
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Also Published As
| Publication number | Publication date |
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| CN102809873B (en) | 2016-02-24 |
| CN105527779A (en) | 2016-04-27 |
| JP5857322B2 (en) | 2016-02-10 |
| CN202916568U (en) | 2013-05-01 |
| CN105527779B (en) | 2018-11-02 |
| JP2012252120A (en) | 2012-12-20 |
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