CN101533145A - Floating type image tracing auto focus system of image sensor - Google Patents
Floating type image tracing auto focus system of image sensor Download PDFInfo
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- CN101533145A CN101533145A CN200810026840A CN200810026840A CN101533145A CN 101533145 A CN101533145 A CN 101533145A CN 200810026840 A CN200810026840 A CN 200810026840A CN 200810026840 A CN200810026840 A CN 200810026840A CN 101533145 A CN101533145 A CN 101533145A
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Abstract
A floating type image tracing auto focus system of an image sensor comprises an image sensor unit and a floating mechanism. The image sensor unit is driven by the floating mechanism to move back and forth and realize focus. The floating mechanism is driven by electromagnetic force. The image sensor unit transmits an image signal to a centralized control processor which controls the floating mechanism to push the image sensor unit to move back and forth, and the focus is not realized until the image transmitted by the image sensor unit becomes clear. By using the floating mechanism to drive the image sensor unit to move back and forth for realizing focus, the auto focus system is small in size, thin in thickness and light in weight, applicable to different equipment without alteration and strong in applicability.
Description
Technical field:
The present invention relates to the floating type image tracing autofocus system of imageing sensor.
Background technology:
Traditional image tracing autofocus system, be called for short the AF system, structure is formed as shown in Figure 1, comprise imaging lens assembly A, image sensor module B, the lens driving mechanism C that central control processor D and driving lens assembly move around, its principle of work is: when the imaging surface MN at lens assembly A rear and image sensor module B not the time with one side, the image that image sensor module B is sent to central control processor D is unsharp, therefore, central control processor instruction lens driving mechanism C drives lens assembly A and moves around along optical axis, thereby imaging surface MN is moved around, when imaging surface MN and image sensor module B with one side the time, focus successfully, the image that image sensor module is sent to central control processor is clearly.But there is following shortcoming in this AF system: 1) owing to be to drive lens assembly by lens driving mechanism to move around and focus, and traditional lens driving mechanism comprises that driving force ratio such as motor, electromagnetism, ultrasound wave, mechanical type are less, so can only drive the motion of certain eyeglass in less camera lens or the optical system, therefore have tangible limitation; 2) lens driving mechanism complex structure, thicker and heavy, volume is big, makes whole AF systematic comparison thick and heavy, and volume is big; 3) when the AF system applies arrives as equipment such as camera, video cameras, because the AF system adopts the mode that drives lens assembly, therefore must mate with optical element on the equipment such as camera, video camera, could use after need modifying, therefore, poor for applicability, can not form a standard component and remove to be suitable for different equipment.
In addition, though can expect obviously in Fig. 1 by driving the purpose that image sensor module reaches automatic focusing as those of ordinary skill in the art.But there are two unsurmountable technical barriers to those skilled in the art in this mode, thus one skilled in the relevant art have technology prejudice inwardly, this mode may realize hardly.First technical barrier: imageing sensor is in the circuit board integrated usually usually, and wiring board is hard and bigger, in the process that image sensor module moves around, can not guarantee reliably that imageing sensor is connected with the effectively stable of wiring board; 2) how to guarantee imageing sensor in moving process, the optical axis direction of imageing sensor optical axis direction and camera lens is consistent, and makes imageing sensor catch distinct image.
Summary of the invention:
The purpose of this invention is to provide the floating type image tracing autofocus system of imageing sensor, it utilizes relocation mechanism driving image sensor module to move around and realizes focusing, and volume is little, thickness is little, in light weight, just can change and can be suitable for different equipment, applicability is strong.
Technical scheme of the present invention is achieved in that
The floating type image tracing autofocus system of imageing sensor, it comprises image sensor module and relocation mechanism, image sensor module is driven to move around by relocation mechanism realizes focusing.
The present invention compared with prior art has following advantage: moves around by relocation mechanism driving image sensor module and realizes focusing, and compact conformation, volume is little, and is in light weight, and adaptability is strong, and the optical system that can change original equipment just can directly be used.
Above-mentioned described relocation mechanism is the power-actuated relocation mechanism of electromagnetism.Be easier to control by the electromagnetic force drive ratio, and the precision height of control, driving force is big.
The power-actuated relocation mechanism of above-mentioned described electromagnetism comprises coil former, coil winding, permanent magnet, translation supporting mechanism and resetting-mechanism on the coil former, coil former is installed and is connected on the translation supporting mechanism, arranged alongside at coil former has permanent magnet, image sensor module is installed on the coil former, and translation supporting mechanism is connected with resetting-mechanism.
Above-mentioned described translation supporting mechanism comprises a pair of identical parallel four-bar linkage, and the coil former both sides are connected with translation connecting rod on the parallel four-bar linkage respectively.It is more steady when coil former is moved around, and the optical axis direction of the image sensor module on the assurance coil former in moving process all the time with camera lens optical axis direction keeping parallelism, not run-off the straight, thus make image sensor module obtain relatively distinct image.
Above-mentioned described at the identical permanent magnet of a pair of magnetic polarity of the above and below of coil former symmetric arrangement.
The outside of above-mentioned described coil former is a lens mount, permanent magnet is fixed on the lens mount, two ends on the parallel four-bar linkage are hinged on the lens mount, and imaging lens is installed on lens mount, and the translation connecting rod on the parallel four-bar linkage is connected with the coil former sidewall.
Translation connecting rod on the above-mentioned described parallel four-bar linkage is provided with projection, and under projection, the stiff end of parallel four-bar linkage is provided with projection down, both ends of the spring is enclosed within projection and following projection respectively.When the electromagnetic force that acts on coil former disappears, utilize spring to drive parallel four-bar linkage and reset, thereby imageing sensor is resetted.
Above-mentioned described image sensor module comprises imageing sensor, soft-circuit board FPC and reinforced sheet, imageing sensor is integrated on the one side of soft-circuit board FPC, on soft-circuit board FPC another side reinforced sheet is installed, reinforced sheet makes soft-circuit board FPC and imageing sensor keep reliable and stable to be connected.
The length of two swing arms on the above-mentioned described parallel four-bar linkage is at least greater than 5.0mm.The optical axis of assurance image sensor module and the deviation of camera lens optical axis are enough little, thereby make image sensor module obtain relatively distinct image.
Above-mentioned described image sensor module is that picture signal is sent to central control processor, and central control processor control relocation mechanism promotes image sensor module and moves around, and till the clear picture that image sensor module transmits, realizes focusing automatically.
Description of drawings:
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the principle schematic of traditional image tracing autofocus system;
Fig. 2 is a principle schematic of the present invention;
Fig. 3 is an exploded view of the present invention;
Fig. 4 is a front view of the present invention;
Fig. 5 is the A-A cut-open view of Fig. 4;
Fig. 6 is B-B cut-open view of Fig. 4;
Fig. 7 is the structural representation of image sensor module 1 of the present invention;
Fig. 8 is the motion synoptic diagram of parallel four-bar linkage of the present invention.
Embodiment:
As shown in Figure 2, the floating type image tracing autofocus system of imageing sensor of the present invention comprises lens assembly 4, image sensor module 1 and relocation mechanism 2 and central control processor 3, image sensor module 1 is that picture signal is sent to central control processor 3, central control processor 3 control relocation mechanisms 2 promote image sensor module 1 and move around, up to image sensor module 1 with after imaging surface MN overlaps, the clear picture that image sensor module 1 transmits realizes focusing automatically.Lens assembly 4 is motionless in this technical scheme.Central control processor 3 can be single-chip microcomputer or digital signal processor DSP.
As Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, described relocation mechanism 2 is the power-actuated relocation mechanisms of electromagnetism, it comprises coil former 5, coil winding 6, permanent magnet 7, translation supporting mechanism and resetting-mechanism on the coil former 5, coil former 5 is installed and is connected on the translation supporting mechanism, image sensor module 1 is installed on the coil former 5, and translation supporting mechanism is connected with resetting-mechanism.In the outside of coil former 5 are lens mounts 8, and permanent magnet 7 is fixed on the lens mount 8, and lens assembly 4 is installed on lens mount 8, and the translation connecting rod 9 of parallel four-bar linkage is connected with coil former 5 sidewalls.Translation supporting mechanism comprises a pair of identical parallel four-bar linkage, and the two ends on the parallel four-bar linkage are hinged on the lens mount 8, and the coil former both sides are connected with translation connecting rod 9 on the parallel four-bar linkage respectively.Parallel four-bar linkage comprises translation connecting rod 9 and two swing arms 10.At the identical permanent magnet 7 of the above and below of the coil former 5 a pair of magnetic polarity of symmetric arrangement.Resetting-mechanism comprises spring 13, is provided with projection 11 at the translation connecting rod 9 on the parallel four-bar linkage, and under projection 11, the stiff end of parallel four-bar linkage is provided with projection 12 down, spring 13 two ends are enclosed within respectively on projection 11 and the following projection 12.The length of two swing arms 10 on the parallel four-bar linkage is at least greater than 5.0mm.
As shown in Figure 7, described image sensor module 1 comprises imageing sensor 14, soft-circuit board FPC15 and reinforced sheet 16, and imageing sensor 14 is integrated on the one side of soft-circuit board FPC15, on soft-circuit board FPC15 another side reinforced sheet 16 is installed.Image sensor module 1 of the present invention has overcome technological difficulties: promptly imageing sensor 14 is integrated on the soft-circuit board FPC15, when imageing sensor 14 moved around, soft-circuit board FPC15 was connected with the contact that imageing sensor 14 is remained valid all the time by the flexural deformation of self.
Principle of work of the present invention is: image sensor module 1 is sent to central control processor 3 with picture signal, central control processor 3 control relocation mechanisms 2 promote image sensor module 1 and move around, up to image sensor module 1 with after imaging surface MN overlaps, the clear picture that image sensor module 1 transmits realizes focusing automatically.Central control processor 3 by the direction of current of control flowing through coil winding 6 can control on the relocation mechanism 2 coil former 5 reaches or after move, the size of the electric current by control flowing through coil winding 6, can 5 reaches of control coil frame or after the displacement of moving.Therefore this control mode very simple effectively control image sensor module 1 floats.When coil winding 6 does not have galvanization, support by one group of identical parallel four-bar linkage respectively in coil former 5 both sides, keep a stable original state in order to make parallel four-bar linkage, spring 13 is installed on parallel four-bar linkage.For the coil winding 6 at the coil winding 6 that makes coil former 5 bottoms and top obtains an identical pulling force, at the identical permanent magnet 7 of the above and below of the coil former 5 a pair of magnetic polarity of symmetric arrangement.When central processor controls 3 is instructed to coil winding 6 energisings, coil winding 6 is subjected to pulling force, coil winding 6 is moved together with the resistance that coil former 5 overcomes spring 13, since coil former 5 both sides respectively with an identical parallel four-bar linkage on translation connecting rod 9 connect, making coil former 5 is the same with the movement locus of translation connecting rod 9, coil former 5 remains parallel attitude motion with optical axis and does not tilt, the optical axis that just makes coil former 5 epigraph sensors 14 is with the optical axis keeping parallelism of lens assembly 4 or overlap, though, sometimes the optical axis of the optical axis of imageing sensor 14 and lens assembly 4 between have difference in height, but as long as difference in height is enough little, and the imaging scope of lens assembly 4 is enough big, and then this deviation can be ignored.With the present invention is example, as shown in Figure 8, article two, when the length of swing arm 10 is 7.0mm, exist difference in height △ H to have only 0.005mm at most between the optical axis of the imageing sensor 14 in camera lens focus circle and the optical axis of lens assembly 4, the imaging scope of imageing sensor 14 is about 1000 times of actual formation image range, so, this small difference in height only makes actual formation image range be offset slightly at imageing sensor 14, but the sharpness of image is not exerted an influence.As long as the not run-off the straight of optical axis of the relative lens assembly 4 of optical axis of imageing sensor 14, it is more or less freely obtaining so to stablize distinct image.Because the present invention adopts imageing sensor 14 ralocatable modes to focus automatically, when being applied to be with equipment such as camera, video camera, need not change original optical system just can use extremely well-adapted.
Claims (10)
1, the floating type image tracing autofocus system of imageing sensor, it is characterized in that: it comprises image sensor module and relocation mechanism, image sensor module is driven to move around by relocation mechanism realizes focusing.
2, the floating type image tracing autofocus system of imageing sensor according to claim 1 is characterized in that: described relocation mechanism is the power-actuated relocation mechanism of electromagnetism.
3, the floating type image tracing autofocus system of imageing sensor according to claim 2, it is characterized in that: the power-actuated relocation mechanism of electromagnetism comprises coil former, coil winding, permanent magnet, translation supporting mechanism and resetting-mechanism on the coil former, coil former is installed and is connected on the translation supporting mechanism, arranged alongside at coil former has permanent magnet, image sensor module is installed on the coil former, and translation supporting mechanism is connected with resetting-mechanism.
4, according to claim 1, the floating type image tracing autofocus system of 2 or 3 described imageing sensors, it is characterized in that: translation supporting mechanism comprises a pair of identical parallel four-bar linkage, and the coil former both sides are connected with translation connecting rod on the parallel four-bar linkage respectively.
5, the floating type image tracing autofocus system of imageing sensor according to claim 4 is characterized in that: at the identical permanent magnet of a pair of magnetic polarity of the above and below of coil former symmetric arrangement.
6, the floating type image tracing autofocus system of imageing sensor according to claim 5, it is characterized in that: in the outside of coil former is lens mount, permanent magnet is fixed on the lens mount, two ends on the parallel four-bar linkage are hinged on the lens mount, lens assembly is installed on lens mount, and the translation connecting rod is connected with the coil former sidewall on the parallel four-bar linkage.
7, the floating type image tracing autofocus system of imageing sensor according to claim 4, it is characterized in that: resetting-mechanism comprises spring, be provided with projection at the translation connecting rod on the parallel four-bar linkage, under projection, the stiff end of parallel four-bar linkage is provided with projection down, both ends of the spring is enclosed within respectively on projection and the following projection.
8, according to claim 1, the floating type image tracing autofocus system of 2 or 3 described imageing sensors, it is characterized in that: described image sensor module comprises imageing sensor, soft-circuit board FPC and reinforced sheet, imageing sensor is integrated on the one side of soft-circuit board FPC, on soft-circuit board FPC another side reinforced sheet is installed.
9, the floating type image tracing autofocus system of imageing sensor according to claim 7, it is characterized in that: the length of two swing arms on the parallel four-bar linkage is at least greater than 5.0mm.
10, according to claim 1, the floating type image tracing autofocus system of 2 or 3 described imageing sensors, it is characterized in that: image sensor module is that picture signal is sent to central control processor, central control processor control relocation mechanism promotes image sensor module and moves around, till the clear picture that image sensor module transmits, realize focusing automatically.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810026840XA CN101533145B (en) | 2008-03-12 | 2008-03-12 | Floating type image tracing auto focus system of image sensor |
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| CN200810026840XA CN101533145B (en) | 2008-03-12 | 2008-03-12 | Floating type image tracing auto focus system of image sensor |
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| CN101533145B CN101533145B (en) | 2011-07-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106161941A (en) * | 2016-07-29 | 2016-11-23 | 深圳众思科技有限公司 | Dual camera chases after burnt method, device and terminal automatically |
| CN107668898A (en) * | 2017-11-15 | 2018-02-09 | 长沙翼希网络科技有限公司 | A kind of Intelligent blower |
| WO2019071659A1 (en) * | 2017-10-13 | 2019-04-18 | 高瞻创新科技有限公司 | Small split-type auto focus actuator with low power consumption |
| CN110261988A (en) * | 2019-06-01 | 2019-09-20 | 瑞声科技(新加坡)有限公司 | Autofocus lens component and its Atomatic focusing method |
| CN111405157A (en) * | 2020-03-24 | 2020-07-10 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
| CN113905167A (en) * | 2021-10-15 | 2022-01-07 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN114390183A (en) * | 2022-02-17 | 2022-04-22 | 维沃移动通信有限公司 | Imaging device and electronic apparatus |
| US11522986B2 (en) | 2020-03-19 | 2022-12-06 | Samsung Electronics Co., Ltd. | Electronic device including camera module for taking image through at least one portion of display |
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| CN2539201Y (en) * | 2002-04-29 | 2003-03-05 | 金宝电子工业股份有限公司 | Automatic focusing mechanism for digital camera |
| CN1786808B (en) * | 2004-12-11 | 2010-10-06 | 鸿富锦精密工业（深圳）有限公司 | Optical auto-focusing apparatus |
| CN1862358B (en) * | 2005-05-11 | 2012-03-21 | 华移联科（沈阳）技术有限公司 | Automatic focusing device |
| CN201233491Y (en) * | 2008-03-12 | 2009-05-06 | 贾怀昌 | Floating type image tracking automatic focusing system for image sensor |
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- 2008-03-12 CN CN200810026840XA patent/CN101533145B/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106161941A (en) * | 2016-07-29 | 2016-11-23 | 深圳众思科技有限公司 | Dual camera chases after burnt method, device and terminal automatically |
| WO2019071659A1 (en) * | 2017-10-13 | 2019-04-18 | 高瞻创新科技有限公司 | Small split-type auto focus actuator with low power consumption |
| CN107668898A (en) * | 2017-11-15 | 2018-02-09 | 长沙翼希网络科技有限公司 | A kind of Intelligent blower |
| CN110261988A (en) * | 2019-06-01 | 2019-09-20 | 瑞声科技(新加坡)有限公司 | Autofocus lens component and its Atomatic focusing method |
| US11522986B2 (en) | 2020-03-19 | 2022-12-06 | Samsung Electronics Co., Ltd. | Electronic device including camera module for taking image through at least one portion of display |
| CN111405157A (en) * | 2020-03-24 | 2020-07-10 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
| WO2021190186A1 (en) * | 2020-03-24 | 2021-09-30 | Oppo广东移动通信有限公司 | Camera module, photosensitive driving apparatus and electronic device |
| CN111405157B (en) * | 2020-03-24 | 2022-03-29 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
| CN113905167A (en) * | 2021-10-15 | 2022-01-07 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN113905167B (en) * | 2021-10-15 | 2024-02-27 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN114390183A (en) * | 2022-02-17 | 2022-04-22 | 维沃移动通信有限公司 | Imaging device and electronic apparatus |
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