CN101107555B - Imaging device and electronic apparatus - Google Patents
Imaging device and electronic apparatus Download PDFInfo
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- CN101107555B CN101107555B CN2006800032612A CN200680003261A CN101107555B CN 101107555 B CN101107555 B CN 101107555B CN 2006800032612 A CN2006800032612 A CN 2006800032612A CN 200680003261 A CN200680003261 A CN 200680003261A CN 101107555 B CN101107555 B CN 101107555B
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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
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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
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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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
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
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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
- G03B29/00—Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects
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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
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
An imaging device (100) has a lens, an imaging element, an outer tube section (5) for holding the lens, a cam member (6) for supporting the outer tube section (5) and displacing the outer tube section (5) and the lens, a drive motor, and a CPU for performing autofocusing. The cam member (6) has formed on it a cam surface (611) with which a contact section (53a) formed on the outer tube section (5) comes in contact. The cam surface (611) has an AF range (61e) for autofucusing, an over-infinity range (61b) and an extremely close range (61d) that are continuous in font and back of the autofocus range (61e), and a large step range (61f). The cam surface (611) also has a photo interrupter (9) for detecting the contact section (53a) reaching the large step range (61f). The lengths of the over-infinity range (61b) and the extremely close range (61d) are set equal to or greater than the length of an error range a of a detection position occurring by an individual difference between imaging devices.
Description
Technical field
The present invention relates to carry in electronic equipments such as portable telephone or personal computer camera head and the built-in electronic equipment of this camera head.
Background technology
Current, known have a small-sized and high performance camera head that can carry in electronic equipments such as portable telephone or personal computer, as this camera head, have the optical imagery that possesses the imaging subject pick-up lens, by the pick-up lens imaging optical imagery be transformed into the device of the imaging apparatuss such as CMOS type imageing sensor of electric signal.
In addition, as camera head, known have pick-up lens is moved along optical axis direction (for example carry out device that focus adjusts, with reference to patent documentation 1), in recent years, also developing the device that has by self-focusing (AF) processing capacity that moves, carries out automatically the focus adjustment of under the control of CPU, carrying out this pick-up lens automatically.
In such camera head, have and for example possess the cam member that pick-up lens is supported, formed the cam surface in the AF district that has horizontal component or be connected from its downside with this horizontal component, by this cam member is moved along predetermined direction, the device that pick-up lens is moved freely along optical axis direction.More particularly, on the more upside in the AF district of cam member, make the predetermined overlap of overlap joint pick-up lens by the driving cam member, thereby can aim at focus from utmost point near field one side, in addition, the overlap of overlap joint pick-up lens on the more downside in AF district, thus can aim at focus from a farther regional side.
Yet, being provided with in cam member becomes the starting point of cam starting point part, pick-up lens is suitably moved under the situation in utmost point near region or infinity zone, need with this starting point partly be benchmark from the overfocus position to utmost point near region or the pulse number of the stepper motor in infinity zone be stored in the storer.
Patent documentation 1: the spy opens flat 10-170809 communique
Yet whether the predetermined overlap that the detection of the starting point of cam part is equivalent to detect pick-up lens in the moving process of cam member has arrived the starting point part, owing to the individual difference of cam member etc. produces the error of detection position.Thereby the margin of error of this detection position of storage in storer was in advance revised the error Control of this detection position in the past, and was therefore cumbersome, also had the problem that causes cost to rise.
Summary of the invention
Thereby problem of the present invention is to provide can be easier and remove the sex camera head of dispersion of the detection position that the individual difference by camera head causes and the electronic equipment that has possessed this camera head with low cost.
In order to solve above-mentioned problem, in a mode of the present invention, camera head possesses the pick-up lens of the optical imagery of imaging subject, by above-mentioned pick-up lens imaging optical imagery be transformed into the imaging apparatus of electric signal, the retaining member that keeps above-mentioned pick-up lens, support the supporting member of above-mentioned retaining member, be arranged on a certain side of above-mentioned retaining member and above-mentioned support component and make the cam portion of above-mentioned pick-up lens along the optical axis direction displacement with respect to above-mentioned imaging apparatus, the driver element that is used to make a certain side of above-mentioned retaining member and above-mentioned supporting member to rotate, the driving of controlling above-mentioned driver element when taking above-mentioned subject makes above-mentioned pick-up lens move along optical axis direction, automatically adjust the automatic focus processing unit that the automatic focus of the focusing position of this pick-up lens is handled
Above-mentioned cam portion is formed with the cam surface of the overlap overlap joint that forms on the opposing party's that this cam portion is not set the part in above-mentioned retaining member and above-mentioned supporting member, this cam surface possess in above-mentioned automatic focus is handled, be used for making above-mentioned pick-up lens along the AF district of optical axis direction displacement, with two horizontal components of the continuous setting in front and back in this AF district and the starting point part of this cam surface; Possess and detect the detecting unit that above-mentioned overlap has arrived above-mentioned starting point part, the error range length that the length of above-mentioned horizontal component produces more than or equal to the individual difference according to this camera head by the detected detection position of above-mentioned detecting unit.
Here, so-called " error range by the detected detection position of above-mentioned detecting unit that produces according to the individual difference of camera head " means and detected overlap by detecting unit when snapping into the starting point part, between each camera head, in the detection position that the individual difference according to cam member or detecting unit etc. produces dispersiveness takes place, at this moment the scope of the dispersiveness of the detection position between these each camera heads.
According to aforesaid way of the present invention, if snapping into cam surface, the overlap of cam portion, overlap arrives starting point part in this cam surface, then detect by detecting unit.And, partly the error range length of the detection position of detecting by detecting unit that produces more than or equal to individual difference of the length of two horizontal components in the cam surface of starting point with starting point according to camera head.
Thus, even in each camera head, disperse, but because the length of horizontal component is long than this error range length, so can make overlap be arranged in horizontal component on the cam surface reliably by the detected detection position of detecting unit.
Thereby, need in storer, not be stored in the error of detection positions different in each camera head, can be easily and remove the influence that the dispersiveness of the detection position that the individual difference by camera head causes produces with low cost.
Description of drawings
Fig. 1 is that expression is as being suitable for the illustrative camera head planimetric map of an embodiment of the invention.
Fig. 2 is that the part of the camera head in the A-A line of Fig. 1 is omitted sectional view.
Fig. 3 is the block diagram of major part structure of the camera head of presentation graphs 1.
Fig. 4 is the oblique view that is illustrated in the cam member that possesses in the camera head of Fig. 1.
The convex surface and the pulse signal of the cam member of (a) pattern ground presentation graphs 4 of Fig. 5 (b) are the part enlarged drawing that is used for specification error scope σ (a).
Fig. 6 is that the part of the camera head in the A-A line of Fig. 1 is omitted sectional view.
Fig. 7 is the front view (FV) and the back view of an example that the portable telephone of camera head of the present invention has been carried in expression.
Symbol description
100: camera head
3: imaging apparatus
41: the 1 camera lenses (pick-up lens)
42: the 2 camera lenses (pick-up lens)
43: the 3 camera lenses (pick-up lens)
44: the camera lens fixed frame
44a: pin thread (focus state adjusting mechanism)
5: urceolus (retaining member)
51a: female screw (focus state adjusting mechanism)
53: overlap
6: cam member
61: overhead cam part (cam portion)
61a: reference region (reference position part)
61b: cross unlimited far field (flat)
61d: utmost point near region (flat)
61e:AF district (dip plane part)
61f: big drop district (starting point part)
62: lower disc part (pedestal)
7: drive motor (driver element)
10a:CPU (automatic focus processing unit)
T: portable telephone (electronic equipment)
Embodiment
Above-mentioned purpose of the present invention reaches by following structures.
(1) a kind of camera head possesses: the pick-up lens of the optical imagery of imaging subject; By above-mentioned pick-up lens imaging optical imagery be transformed into the imaging apparatus of electric signal; The retaining member that keeps above-mentioned pick-up lens; Support the supporting member of above-mentioned retaining member; Be arranged on a certain side of above-mentioned retaining member and above-mentioned support component, make the cam portion of above-mentioned pick-up lens along the optical axis direction displacement with respect to above-mentioned imaging apparatus; The driver element that is used to make a certain side of above-mentioned retaining member and above-mentioned supporting member to rotate; When taking above-mentioned subject, control the driving of above-mentioned driver element, above-mentioned pick-up lens is moved along optical axis direction, automatically adjust the automatic focus processing unit that the automatic focus of the focusing position of this pick-up lens is handled, above-mentioned cam portion is formed with the cam surface of the overlap overlap joint that forms on the opposing party's that this cam portion is not set the part in above-mentioned retaining member and above-mentioned supporting member, this cam surface possesses in above-mentioned automatic focus is handled and is used to make the AF district of above-mentioned pick-up lens along the optical axis direction displacement, with continuous two horizontal components that are provided with in the front and back in this AF district, and the starting point part in this cam surface, possess and detect the detecting unit that above-mentioned overlap has arrived above-mentioned starting point part, the error range length that the length of above-mentioned horizontal component produces more than or equal to the individual difference according to this camera head by the detected detection position of above-mentioned detecting unit.
Here, so-called " error range by the detected detection position of above-mentioned detecting unit that produces according to the individual difference of camera head " means and detected overlap by detecting unit when snapping into the starting point part, between each camera head, in the detection position that the individual difference according to cam member or detecting unit etc. produces dispersiveness takes place, at this moment the scope of the dispersiveness of the detection position between these each camera heads.
(2) in the camera head of putting down in writing in above-mentioned (1), above-mentioned two horizontal components constitute distant place district and the utmost point near region that the overfocus position is clipped in the middle and disposes.
(3) in the camera head of putting down in writing in above-mentioned (2), the horizontal component that constitutes above-mentioned distant place district was unlimited far field.
(4) in the camera head of in above-mentioned (2) and (3), putting down in writing, the cam surface of above-mentioned cam portion is removed beyond above-mentioned two horizontal components, also has the reference position part (reference region) of the level of the position of the optical axis direction of the above-mentioned pick-up lens in location between the district and utmost point near region in the distance.
(5) in the camera head of putting down in writing in above-mentioned (4), said reference position part is not to be formed in above-mentioned sloping portion midway.
(6) in the camera head of in above-mentioned (4), putting down in writing, the error range length that the said reference position produces more than or equal to the individual difference owing to this camera head by the detected detection position of above-mentioned detecting unit.
(7) in the camera head of putting down in writing in above-mentioned (4), above-mentioned cam surface constitutes by the order of said reference position part, above-mentioned distant place district, above-mentioned AF district, above-mentioned utmost point near region.
(8) in the camera head of in above-mentioned (4), putting down in writing, possess on the part of said reference position the above-mentioned overlap of overlap joint and located under the state of above-mentioned pick-up lens, with respect to above-mentioned retaining member this pick-up lens is moved along optical axis direction, adjust the focusing state adjusting mechanism of the focusing state of above-mentioned pick-up lens.
(9) in the camera head of in each of above-mentioned (1)～(8), putting down in writing, above-mentioned cam portion and above-mentioned overlap keep above-mentioned retaining member or above-mentioned supporting member with a plurality of points more than 3 that separate about equally at interval around the axle of optical axis direction simultaneously in relative rotation.
Below, use accompanying drawing concrete mode to be described for the present invention.Yet scope of the present invention is not limited to illustrated embodiment.
Fig. 1 is expression as being suitable for the planimetric map of the illustrative camera heads 100 of an embodiment of the invention, and Fig. 2 is that the part of the camera head 100 in the A-A line of Fig. 1 is omitted sectional view.In addition, Fig. 3 is the block diagram of major part structure of the control system of expression camera head 100.
In addition, in Fig. 1, omitted the diagram of the loam cake 1a of crust of the device 1.
The camera head 100 of present embodiment constitutes the automatic focus of the focusing position that can carry out automatic adjustment lens unit 4 and handles, specifically, as Fig. 1～shown in Figure 3, possesses crust of the device 1, be arranged on the substrate 2 of crust of the device 1 downside, be installed in the imaging apparatus 3 on the face of light source one side (upside) of substrate 2, be used to make the lens unit 4 of imaging apparatus 3 optically focused, urceolus 5 as the retaining member that keeps this lens unit 4, support urceolus 5 and make this urceolus 5 with respect to the cam member 6 of imaging apparatus 3 along the optical axis direction displacement, as the drive motor 7 that is used for making the driver element that lens unit 4 moves along optical axis direction through cam member 6, be used for the driving force of drive motor 7 is delivered to the driving force transmission member 8 of cam part 6, photoelectric interrupter 9 as the detecting unit of the position of the optical axis direction that is used for detector lens unit 4, control module 10.
In addition, substrate 2 connects flexible base, board F as shown in Figure 1 on its part.Flexible base, board F is electrically connected with imaging apparatus 3 through predetermined wiring (omitting diagram).
In addition, cover member 31 is set, makes for example have function, and can prevent from this imaging apparatus 3, to adhere to dust etc. as the light filter of blocking-up infrared ray etc. in light source one side of imaging apparatus 3.And light source one side at cover member 31 is provided for the lens unit 4 of the optical imagery of subject imaging on the photoelectric conversion units 3a of imaging apparatus 3.
In addition, the aperture board 45 for example be used to regulate luminous flux is set between the 1st camera lens 41 and the 2nd camera lens 42, in addition, between the 2nd camera lens 42 and the 3rd camera lens 43, is provided for limiting the interval constraint member 46 at the interval of these the 2nd camera lenses 42 and the 3rd camera lens 43.
Camera lens fixed frame 44 possesses pin thread 44a at its outer peripheral portion, by screwing togather the pin thread 44a of camera lens fixed frame 44 on the female screw 51a in being formed at the interior circumferential portion of urceolus 5, thereby lens unit 4 is configured in the inboard of urceolus 5.
Here, rotate around the axle center of optical axis direction, this lens unit 4 is moved freely along optical axis direction, thus, constitute the focusing state adjusting mechanism of the focusing state of adjusting lens unit 4 by make lens unit 4 with respect to urceolus 5.More particularly, go up the overlap 53a of overlap joint urceolus 5 and under the state of having located at the reference region (aftermentioned) of cam member 6 along optical axis direction, use the focusing state of predetermined pattern evaluation lens unit 4, according to its evaluation situation, move along optical axis direction by spiral lens unit 4, adjust the focusing state of this lens unit 4.Like this, carry out the adjustment of the focusing state of the lens unit 4 in the benchmark camera position.
In addition, the first half of pressing member 11 for example snaps into the lower surface of the upper cover part 1a of crust of the device 1, thus, becomes by pressing member 11 often urceolus 5 pressed towards substrate 2 one sides.
In addition, in the precalculated position of urceolus 5, be provided for by the detection of the position of the optical axis direction of photoelectric interrupter 9 detector lens unit 4 with vane member 54.
Secondly, explain cam member 6 with reference to Fig. 4, Fig. 5 (a) and Fig. 5 (b).Here, Fig. 4 is the oblique view of expression cam member 6, the cam surface 611 of Fig. 5 (a) and Fig. 5 (b) pattern ground expression cam member 6.
As shown in Figure 4, cam member 6 for example is the member that forms general toroidal, specifically, constitutes and possesses: have the overhead cam part 61 as cam portion that supports the cam surface 611 of urceolus 5 at upper surface and overlap 53a overlap joint from downside; And be provided with to foreign side is outstanding from the downside of this overhead cam part 61, in outer peripheral portion, formed gear, support lower disc part (pedestal) 62 as supporting member of these urceolus 5 through overhead cam part 61.
The cam surface 611 of overhead cam part 61 shown in Fig. 5 (a), separate roughly 120 ° form at interval have along with the optical axis direction reference region 61a of the surface level that extends of the direction of quadrature roughly, the unlimited far field 61b of mistake with the low slightly surface level of this reference region of aspect ratio 61a, reference region 61a and cross the small drop district 61c that unlimited far field 61b is connected continuously, utmost point near region 61d with the also high surface level of aspect ratio reference region 61a, with the AF district 61e that crosses the continuous setting in unlimited far field 61b and utmost point near region 61d front and back with wide dip plane, the big drop district 61f that utmost point near region 61d and reference region 61a are connected continuously.Thus, by 3 overlap 53a of overlap joint urceolus 5 on the cam surface 611 of cam member 6, cam member 6 becomes at 3 somes support urceolus 5.
And, rotating on optical axis by cam member 6, overlap 53a moves up and down when the cam surface 611 of overhead cam part 61 slides, and thus, with urceolus 5, lens unit 4 is along the optical axis direction displacement.
The difference of height of big drop district 61f for example becomes at least can the enough detections height of vane member 54 switchings from the level degree of the pulse signal of photoelectric interrupter 9 outputs.That is, by cam member 6 rotate so that cam surface 611 for example along the left of figure (a) to moving, overlap 53a moves in big drop district 61f from top to bottom.At this moment, according to detecting with the relative difference of height of vane member 54 with photoelectric interrupter 9, the pulse signal of exporting from this photoelectric interrupter 9 switches to high level (H level) from low level (L level).Big drop district 61f like this constitutes the starting point part.
In addition, reference region 61a becomes the reference position, this reference position is used for being positioned at planar section before and after the AF district 61e when crossing unlimited far field 61b and utmost point near region 61d and carry out automatic focus and handle, and makes lens unit 4 focus and like that lens unit 4 is located at optical axis direction with respect to imaging apparatus 3 crossing infinity position and utmost point near position.Promptly, snap under the state of reference region 61a at the overlap 53a of urceolus 5, the adjustment of the focusing state by carrying out lens unit 4 makes optical imagery imaging on the photoelectric conversion units 3a of imaging apparatus 3, when this lens unit 4 being carried out the automatic focus processing, even moved to infinity position and utmost point near position, the optical imagery of lens unit 4 is imaging on the photoelectric conversion units 3a of imaging apparatus 3 also.
In addition, the zone of the downside of AF district 61e becomes to be used for positioning along optical axis direction and makes the focus zone in a distant place of lens unit 4.
Here, so-called distant place district is the zone that constitutes than the position on the overfocus subject also far away by focusing, and is the zone that comprised unlimited far field.
Crossing unlimited far field 61b becomes to be used for positioning along optical axis direction and makes lens unit 4 cross infinity camera lens fixed position what cross the focusing of infinity position, constitutes in two horizontal components.
Here, the so-called infinity position of crossing is that the shooting multiplying power is positive zone specifically, is more to be in the opposite side of utmost point near region 61d than unlimited far field, can be the side focusing of the focus of lens unit 4 than more unlimited far field, unlimited far field.That is, the predetermined resin of the 1st camera lens the 41, the 2nd camera lens 42 of formation lens unit 4 and the 3rd camera lens 43 is for example according to environmental baselines such as temperature or humidity, and refractive index might change, in this case, and the unlimited far field of can not focusing.Therefore, even the change of the refractive index of resin can not also can be displaced to a 61d opposite side in utmost point near region to focusing position according to crossing unlimited far field 61b from the unlimited far field focusing under the common state, can suitably aim at focus from unlimited far field one side.
Utmost point near region 61 is to be used for positioning along optical axis direction making the focus zone of utmost point close-shot image position of lens unit 4, constitutes in two horizontal components another.Snap into state on the 61d of this utmost point near region by the overlap 53a that becomes urceolus 5, lens unit 4 becomes the state (with reference to Fig. 6) that passes out to very near subject one side.At this moment, the distance of subject and lens unit 4 for example approximately is 5～30 (cm), image at whole the photographs file in the shooting district of imaging apparatus 3 (photoelectric conversion units 3a), perhaps in portable telephone of the present invention (aftermentioned), carry under the situation of camera head 100, can be utilized as the bar code reader to this camera head 100.
Horizontal gear (omitting diagram) engagement on the gear of lower disc part 62 and the lower outer periphery part that is formed on driving force transmission member 8.
In addition, in driving force transmission member 8, at the upside of this horizontal gear part helical teeth (omitting diagram) is set with one heart, worm screw 71 engagements on this helical teeth and the output shaft that is fixedly mounted on drive motor 7 with horizontal gear.
Here, the sense of rotation of driving force transmission member 8 becomes makes lens unit 4 when distant place camera position moves to utmost point close-shot image position, and by the engagement of worm screw 71 with helical teeth, this driving force transmission member 8 is pressed towards the direction of substrate 2 one sides.Promptly, lens unit 4 since by pressing member 11 from light source one side pressure to substrate 2 one sides, therefore making in AF district 61 under the situation that lens unit 4 moves along optical axis direction, is very desirable aspect the bearing accuracy of the optical axis direction of raising lens unit 4 so that become that the mode of the such direction of driving force transmission member 8 pressed towards substrate 2 one sides rotates.
In other words, carrying out automatic focus when preferably helical teeth being arranged in sending of lens unit 4 handles under the situation of (aftermentioned), by sending lens unit 4, make driving force transmission member 8 be pressed towards substrate 2 one sides, when being arranged in the withdrawal of lens unit 4, carries out under the situation of automatic focusing process helical teeth, make that driving force transmission member 8 is pressed towards substrate 2 one sides by regaining lens unit 4.
Drive motor 7 for example is a stepper motor isopulse motor, according to the pulse from CPU10a output input, according to predetermined one by one angle stepper drive rotor.Thus, through screw rod 71 and driving force transmission member 8 cam member 6 is rotated along predetermined direction around the axle of optical axis direction.
Specifically, for example, constitute and possess: light projector (omitting diagram) with the ultrared infrared diode of irradiation; The irradiated infrared ray of sensitization, the photoreceptor (omitting diagram) that the pulse signal to control module output is changed according to the sensitization result.Between light projector and photoreceptor, that is, be arranged under the state of ultrared light path with vane member 54 in detection, if shine infrared ray to photoreceptor from light projector, then block with vane member 54, so photoreceptor can the sensitization infrared ray owing to infrared ray is detected.At this moment, photoelectric interrupter 9 outputs to control module 10 to the pulse signal of L level.On the other hand, be not arranged under the state of ultrared light path with vane member 54 in detection, if the irradiation infrared ray, then by the irradiated infrared ray of photoreceptor sensitization, photoelectric interrupter 9 outputs to control module 10 to the pulse signal of H level.
Here, illustrate by cam member 6 and rotate on optical axis and overlap 53a outputs to the pulse signal of control module 10 when sliding along the cam surface 611 of overhead cam part 61 when mobile from photoelectric interrupter 9 in big drop district 61f.
Overlap joint unit 53a is by moving from the top down in big drop district 61f, the detection that is arranged in the light path of photoelectric interrupter 9 is left from this light path with vane member 54, taking this as an opportunity, switches to the H level from the level of the pulse signal of photoelectric interrupter 9 output from the L level.
Promptly, if photoelectric interrupter 9 overlap 53a arrive big drop district 61f, then by detecting with vane member 54 from the state variation that is arranged in ultrared light path, thereby the pulse signal of H level is outputed to control module 10 as detection signal to the state that leaves.
Here, arrived big drop district 61f through detecting, so the detection position is different with the relative difference of height of vane member 54 according to photoelectric interrupter 9 and detection with vane member 54 detection overlap 53a.
Specifically, for example, because according to scale error that detects each parts of using vane member 54 grades or installation accuracy etc., and different in each camera head 100, therefore between the individuality of camera head 100, in the detection position of output reference pulse signal, produce error range σ.
Here, so-called " error range σ " means detected overlap 53a by photoelectric interrupter 9 when having arrived big drop district 61f, the scope of the dispersiveness of the detection position that produces between the individuality of camera head.
Specifically, as detecting overlap 53a under the state of position (middle position) P1 of the length direction substantial middle that snaps into big drop district 61f at overlap 53a, having regulated when detecting with the size of vane member 54 or photoelectric interrupter 9 or installation is that example describes.
In this case, " error range σ " means the length of the scope that the detection error σ 2 by the error of detection position P3 that detects overlap 53a as the detection error σ 1 of the error of detection position P2 that detects overlap 53a under the state on border that snaps into big drop district 61f and utmost point near region 61d at overlap 53a and middle position P1, conduct under overlap 53a snaps into state among the both sides of big drop district 61f and reference region 61a and middle position P1 constitutes.In addition, producing under the situation that detects error σ 3, σ 4, mean the length of the scope that comprises this detection error σ 3, σ 4 according to characteristic that each camera head possessed etc.Thereby,, produce error range σ 5 as the maximum error scope that between the individuality of camera head, produces.
Here, constitute in each regional length of cam surface 611, the length of crossing unlimited far field 61b and utmost point near region 61d is roughly suitable, in addition, reference region 61a possessed roughly 2 times the length of unlimited far field 61b, AF district 61e possessed roughly 3 times the length of unlimited far field 61b, and the length of small drop district 61c is all lacked than any regional length.In addition, the length of unlimited far field 61b of mistake and utmost point near region 61d is the length more than or equal to error range σ 5.
CPU (CPU (central processing unit)) 10a totally controls the each several part that constitutes this camera head 100, reads the preset program that is kept among the storage unit 10c and launches in the workspace of RAM10b, carries out various processing according to this program.
RAM (random access memory) 10b is formed under the control of CPU10a the memory block of the program of reading from storage unit 10c or data etc. or workspace etc.
The automatic focus handling procedure is as the automatic focus disposal route in CPU10a, when the shooting of subject, the driving of controlling and driving motor 7 is carried out in realization, the urceolus 5 that keeps lens unit 4 is moved along optical axis direction, adjust the functional programs that the automatic focus of the focusing position of this lens unit 4 is handled automatically.
Here, automatic focus is handled for example under the control of CPU10a, cam member 6 is rotated along predetermined direction, slide on cam surface 611 by the overlap 53a that makes urceolus 5, when lens unit 4 is moved between camera position and the utmost point close-shot image position in the distance, obtain view data by taking subject.And CPU10a is kept at obtained frequency analysis data in the RAM10b in proper order by the characteristic frequency analysis in a plurality of focuses adjustment position of carrying out obtained view data.And then CPU10a is according to the frequency analysis data that is kept in the RAM10b, and the focus of estimating this view data is adjusted the focusing state of the optical imagery of this subject in the position, and the camera position of evaluation of estimate the best is defined as focusing position.
In this case, CPU10a is just changeing drive motor 7, make lens unit 4 move to the precalculated position of utmost point close-shot image position from distant place camera position, after the camera position that finds evaluation of estimate the best, by making drive motor 7 counter-rotatings, make cam member 6 counter-rotatings, make lens unit 4 move to distant place camera position from utmost point close-shot image position.And, drive motor 7 is just being changeed, make lens unit 4 move to the camera position control of evaluation of estimate the best.In this case, for example, consider to can be compared to this Offset portion most and return some more by the skew of the counter-rotating generation of drive motor 7.
In addition, under the situation that is set at " grand pattern ", CPU10a does not carry out automatic focus and handles, and makes lens unit 4 move to utmost point near region 61d.
In addition, in automatic focus is handled, change, so that make lens unit 4 move to utmost point close-shot image position along a direction from distant place camera position, compare the number of steps that the image in next AF district 61e is taken into an AF district 61e on the cam surface 611 that is arranged on cam member 6 trickleer.Promptly, in an AF district 61e, search for the target of the good camera position of evaluation of estimate, be stored to the umber of pulse from reference region 61a of the camera position that becomes this target in advance, according to this umber of pulse, in next AF district 61e, becoming target camera position near fine carry out being taken into of image, thereby can more suitably carry out the evaluation of the focusing state of optical imagery.
When the starting of camera head, can detect the starting point part by making the cam unit along a direction rotation, the state that once drives when stopping before therefore not relying on can detect the starting point part, thereby can start with simple control.In addition, cam portion is owing to be the rotation shape that does not have terminal point, do not detect starting point and partly waits the mistake that causes even therefore photoelectric interrupter 9 takes place, and also can not produce obstacle in the tectosome of cam unit.
Secondly, illustrate that having carried with above-mentioned camera head 100 is the electronic equipment of the camera head of the present invention 100 of an example.
As shown in Figure 7, electronic equipment for example is folding portable telephone T, connects the upper box 12a and the lower box 12b that has possessed action button P that conduct has possessed the shell of display frame by hinge 12c.Camera head 100 is installed in the below of display frame D of inside surface one deck (side with display frame D) of upper box 12a, and camera head 100 is taken into light from the outside surface of upper box 12a.
Like this, even camera head 100 is installed in the inside of portable telephone T, also can suppress the maximization of portable telephone T, in addition, owing to can therefore become the high portable telephone T of surcharge corresponding to more suitably carry out the shooting of subject with the distance of subject or imaging environment etc.
In addition, therefore other inscape of portable telephone T omits explanation owing to be well-known.
As mentioned above, camera head 100 according to present embodiment, if be arranged on the cam surface 611 that overlap 53a on the urceolus 5 snaps into cam member 6, the big drop district 61f in this cam surface 611 arrives overlap 53a, is then detected by photoelectric interrupter 9.And, with big drop district 61f the error range length that the length of unlimited far field 61b of mistake in the cam surface 611 of starting point and utmost point near region 61d produces more than or equal to the individual difference according to camera head by power supply interrupter 9 detected detection positions.
Thus, even in each camera position, disperse by photoelectric interrupter 9 detected detection positions, but, so can make overlap 53a be arranged in unlimited far field 61b of mistake and utmost point near region 61d on the cam surface 611 reliably because it is long than the length of this error range to cross the length of unlimited far field 61b and utmost point near region 61d.
Thereby, need in storer, not be stored in the error of detection positions different in each camera head 100, can be easily and remove at low cost by resulting from the influence that the dispersion of detection position of camera head individual difference produces.
More particularly, for example, can prevent to fall from big drop district 61f owing to the detection position disperses the overlap 53a that snaps among the 61d of utmost point near region.
In addition, because it is long to cross the length of unlimited far field 61b and utmost point near region 61d ratio error scope, therefore do not carry out the processing of software especially, can make overlap 53a be arranged in unlimited far field 61b and utmost point near region 61d reliably, can carry out automatic focus better and handle.
And, by having unlimited far field 61b,, also can guarantee unlimited far field reliably even taken place under the situation of temperature variation, can carry out automatic focus preferablyly and handle.
And then, camera head 100 possesses the automatic focus processing unit of the automatic focus processing of the focusing position of adjusting lens unit 4 when taking subject automatically, make lens unit 4 in the position of the cam surface 611 of the cam member 6 of the optical axis direction displacement optical axis direction of fixed lens unit 4 when taking subject with respect to imaging apparatus 3 with fixed-focus, when automatic focus is handled, lens unit 4 is positioned at optical axis direction with respect to imaging apparatus 3, simultaneously, be provided for guaranteeing the reference region 61a of unlimited far field 61b and utmost point near region 61d, be used for making the AF district 61e of lens unit 4 along the optical axis direction displacement by the automatic focus processing.
Promptly, when taking subject with fixed-focus, by cam member 6 is rotated, the overlap 53a of the urceolus 5 that keeps pick-up lens is snapped among the reference region 61a of its cam surface 611, can become the state of lens unit 4 of having fixed with respect to the position of the optical axis direction of imaging apparatus 3.Thus, for example, when the shooting of carrying out based on the subject of fixed-focus, compare with the structure of making a video recording in the precalculated position that lens unit 4 is navigated between the utmost point near region of AF district 61e 61d one side and unlimited far field 61b one side of mistake, can make the control relevant easy, can reduce power consumption with the location of lens unit 4.
In addition, with the reference region 61a that is arranged on the cam surface 611 is benchmark, when automatic focus is handled, can the positioning mirror head unit 4 make lens unit 4 focus remote location and utmost point near position preferablyly, when automatic focus is handled, the optical imagery of having focused aptly on imaging apparatus 3 by lens unit 4 imagings simultaneously, makes the overlap 53a snap into the AF district 61e of cam surface 611 and makes lens unit 4 along the optical axis direction displacement.Thus, need not possess in order to make lens unit 4 move to the precalculated position of optical axis direction the precalculated position that is used for storing in advance AF district 61e or from the precalculated position of AF district 61e to utmost point near region 61d or cross the storer of pulse number of the drive motor 7 of unlimited far field 61b.
Like this, the power of loss in the time of can reducing by lens unit 4 shooting subjects, simultaneously, do not need to possess the storer of the pulse number of the precalculated position that is used to store the benchmark that becomes the overfocus position that makes the lens unit 4 of lens unit 4 when optical axis direction moves etc. or drive motor 7, therefore can seek the miniaturization of this camera head 100 and reduce cost.
And, snap among the reference region 61a and under the state of having located at the overlap 53c of urceolus 5, make lens unit 4 move, adjust the focusing state adjusting mechanism of the focusing state of this lens unit 4 along optical axis direction owing to possess, therefore utilize this focusing state adjusting mechanism can be easy and carry out the adjustment of the focusing state of lens unit 4 aptly with respect to this urceolus 5.
In addition, cam member 6 is owing to use a plurality of points that are made of 3 points that separate about equally at interval to support urceolus 5, therefore can carry out the support of lens unit 4 aptly when the adjustment of the focusing state of the lens unit 4 that is undertaken by the focusing state adjusting mechanism.That is, owing to not only do not need to suppress the such member of for example guide rail of the inclination of lens unit 4, but also can keep at multiple spot for roughly center, therefore can make the strong structure of impact resistance with the center of gravity of lens unit 4.
And, even this camera head 100 is installed in the inside of portable telephone T, also can be easily and remove by resulting from the influence that the dispersiveness of detection position of individual difference of camera head 100 produces with low cost.
In addition, the invention is not restricted to above-mentioned embodiment, without departing from the spirit and scope of the present invention, also can carry out the change of various improvement and design.
In addition, even do not possess the illustrative in the above-described embodiment camera head 100 that is used to carry out the control gear that AF handles, handle relevant structure part structure in addition by making with AF, adjusting mechanism that is the focusing state in the benchmark camera position of the installation constitution of lens unit 4 or this lens unit 4 etc. is identical with the camera head 100 of above-mentioned embodiment, also can be equally and carry out the operations such as adjustment of the focusing state of the assembling of lens unit 4 or this lens unit 4 easily.
In addition, in the above-described embodiment, in the following annular section 53 of urceolus 5, be provided with 3 overlap 53a ..., make by these overlaps 53a is snapped on the cam surface 611 of cam member 6, support urceolus 5 by this cam member 6 at 3 points, yet be not limited to this structure, also can carry out the support of urceolus 5 at a point at least.
In addition, in the above-described embodiment, unlimited far field 61b was set in cam surface 611, but was not limited to this structure, whether formed unlimited far field 61b and also can suitably change.
And then, in the above-described embodiment, detect with vane member 54 by photoelectric interrupter 9, detect overlap 53a and arrived big drop district 61f, and, be not limited to this method as detecting the method that this overlap 53a has arrived big drop district 61f, for example, also can reflecting member be set,, sensors such as reflective optical system for example be set in the position relative with the side of this overhead cam part 61 in the precalculated position of the side of the overhead cam part 61 that constitutes cam member 6.In this case,, detect overlap 53a and arrived big drop district 61f by reflective optical system irradiation, by the reflected light that reflecting member has reflected by reflective optical system sensitization.
In addition, be not limited to drive motor, for example also can use piezoelectric element or marmem etc. as driver element.
Claims (10)
1. camera head, this camera head possesses: the pick-up lens of the optical imagery of imaging subject; By above-mentioned pick-up lens imaging optical imagery be transformed into the imaging apparatus of electric signal; The retaining member that keeps above-mentioned pick-up lens; Support the supporting member of above-mentioned retaining member; Be arranged on a certain side of above-mentioned retaining member and above-mentioned supporting member, make the cam portion of above-mentioned pick-up lens along the optical axis direction displacement with respect to above-mentioned imaging apparatus; The overlap that forms on the opposing party's the part of this cam portion is not set in above-mentioned retaining member and above-mentioned supporting member; The driver element that is used to make a certain side of above-mentioned retaining member and above-mentioned supporting member to rotate; And when taking above-mentioned subject, control the driving of above-mentioned driver element, and above-mentioned pick-up lens is moved along optical axis direction, adjust the automatic focus processing unit that the automatic focus of the focusing position of this pick-up lens is handled automatically, it is characterized in that,
Above-mentioned cam portion is formed with the cam surface that makes the above-mentioned overlap overlap joint that above-mentioned relatively cam portion slides, this cam surface possesses and is used to make above-mentioned pick-up lens along the AF district of the inclination of optical axis direction displacement, with two horizontal components of the continuous setting in front and back in this AF district and by having than the bigger inclination in above-mentioned AF district in above-mentioned automatic focus is handled, when sliding, above-mentioned overlap becomes the starting point part of benchmark of the position probing of above-mentioned two horizontal components
Possess and detect the detecting unit that above-mentioned overlap has arrived above-mentioned starting point part,
The error range length of the detection position that the length of above-mentioned horizontal component produces more than or equal to the individual difference that is caused by the error of above-mentioned detecting unit at least according to this camera head.
2. camera head according to claim 1 is characterized in that,
Above-mentioned two horizontal components constitute distant place district and the utmost point near region that the overfocus position is clipped in the middle and disposes.
3. camera head according to claim 2 is characterized in that,
The horizontal component that constitutes above-mentioned distant place district was unlimited far field.
4. camera head according to claim 2 is characterized in that,
The cam surface of above-mentioned cam portion has the reference position part of level, when this reference position part is used for when making a video recording with fixed-focus the position of optical axis direction of fixing above-mentioned pick-up lens, with respect to above-mentioned imaging apparatus above-mentioned pick-up lens is located along optical axis direction as distant place district and utmost point near region with above-mentioned two horizontal components.
5. camera head according to claim 4 is characterized in that,
Said reference position part does not constitute in the way of above-mentioned sloping portion.
6. camera head according to claim 4 is characterized in that,
The error range length that said reference position part produces more than or equal to the individual difference owing to this camera head by the detected detection position of above-mentioned detecting unit.
7. camera head according to claim 4 is characterized in that,
Above-mentioned cam surface constitutes by the order of said reference position part, above-mentioned distant place district, above-mentioned AF district, above-mentioned utmost point near region.
8. camera head according to claim 4 is characterized in that possessing:
Overlap joint above-mentioned overlap and having located under the state of above-mentioned pick-up lens makes this pick-up lens move along optical axis direction with respect to above-mentioned retaining member on the part of said reference position, adjusts the focusing state adjusting mechanism of the focusing state of above-mentioned pick-up lens.
9. camera head according to claim 1 is characterized in that,
Above-mentioned cam portion and above-mentioned overlap keep above-mentioned retaining member or above-mentioned supporting member with a plurality of points more than 3 that separate about equally at interval around the axle of optical axis direction simultaneously in relative rotation.
10. an electronic equipment is characterized in that,
In equipment body, has the described camera head of claim 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP024056/2005 | 2005-01-31 | ||
| JP2005024056 | 2005-01-31 | ||
| PCT/JP2006/301329 WO2006080443A1 (en) | 2005-01-31 | 2006-01-27 | Imaging device and electronic apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101107555A CN101107555A (en) | 2008-01-16 |
| CN101107555B true CN101107555B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800032612A Expired - Fee Related CN101107555B (en) | 2005-01-31 | 2006-01-27 | Imaging device and electronic apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2006080443A1 (en) |
| KR (1) | KR20070110003A (en) |
| CN (1) | CN101107555B (en) |
| WO (1) | WO2006080443A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008191423A (en) * | 2007-02-05 | 2008-08-21 | Sharp Corp | Lens unit, camera module and imaging apparatus equipped with camera module |
| JP5831158B2 (en) * | 2011-11-18 | 2015-12-09 | リコーイメージング株式会社 | General purpose interchangeable lens |
| CN103713375B (en) * | 2013-12-12 | 2016-05-25 | 东莞市南星电子有限公司 | A kind of automatic regulating jig and control method thereof for tight shot focusing |
| JP6316979B2 (en) * | 2014-10-16 | 2018-04-25 | シャープ株式会社 | Camera module manufacturing method and manufacturing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5592250A (en) * | 1994-06-21 | 1997-01-07 | Asahi Kogaku Kogyo Kabushiki Kaisha | Driving mechanism for a photograhing optical system |
| US5978602A (en) * | 1996-08-12 | 1999-11-02 | Olympus Optical Co., Inc. | Photographic lens unit and photographing method |
| CN1637579A (en) * | 2003-12-26 | 2005-07-13 | 京瓷株式会社 | Camera module and portable terminal with the same camera module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07128568A (en) * | 1993-11-05 | 1995-05-19 | Olympus Optical Co Ltd | Lens driving device |
| JPH08292351A (en) * | 1995-04-25 | 1996-11-05 | Minolta Co Ltd | Camera with lens barrier |
| JP2005077826A (en) * | 2003-09-01 | 2005-03-24 | Minolta Co Ltd | Camera unit |
| JP2005128116A (en) * | 2003-10-22 | 2005-05-19 | Seiko Precision Inc | Optical module |
| JP2006039480A (en) * | 2004-07-30 | 2006-02-09 | Nidec Copal Corp | Lens driving apparatus |
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2006
- 2006-01-27 JP JP2007500599A patent/JPWO2006080443A1/en active Pending
- 2006-01-27 CN CN2006800032612A patent/CN101107555B/en not_active Expired - Fee Related
- 2006-01-27 WO PCT/JP2006/301329 patent/WO2006080443A1/en not_active Application Discontinuation
- 2006-01-27 KR KR1020077017111A patent/KR20070110003A/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5592250A (en) * | 1994-06-21 | 1997-01-07 | Asahi Kogaku Kogyo Kabushiki Kaisha | Driving mechanism for a photograhing optical system |
| US5978602A (en) * | 1996-08-12 | 1999-11-02 | Olympus Optical Co., Inc. | Photographic lens unit and photographing method |
| CN1637579A (en) * | 2003-12-26 | 2005-07-13 | 京瓷株式会社 | Camera module and portable terminal with the same camera module |
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| JP特开2003-279827A 2003.10.02 |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2006080443A1 (en) | 2006-08-03 |
| KR20070110003A (en) | 2007-11-15 |
| CN101107555A (en) | 2008-01-16 |
| JPWO2006080443A1 (en) | 2008-06-19 |
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