CN102033286A - Focusing device and camera module - Google Patents
Focusing device and camera module Download PDFInfo
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- CN102033286A CN102033286A CN2009103079866A CN200910307986A CN102033286A CN 102033286 A CN102033286 A CN 102033286A CN 2009103079866 A CN2009103079866 A CN 2009103079866A CN 200910307986 A CN200910307986 A CN 200910307986A CN 102033286 A CN102033286 A CN 102033286A
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Abstract
The invention provides a focusing device which comprises a housing, a lens, a piezoelectric driving unit and an elastic part, wherein the housing comprises a first surface and a second surface which are opposite to each other, and a first through hole penetrating the first surface and the second surface is formed at the center of the housing; the lens is positioned in the first through hole, and the optical axis of the lens is in superposition with the center line of the first through hole; the piezoelectric driving unit is connected with the housing and the lens and is deformed after being electrified so as to drive the lens to move in the first through hole along the optical axis; and the elastic part is connected with the housing and the lens and can provide the action force in the reverse direction of the moving direction of the lens so as to enable the lens to be still in the preset position. The invention further provides a camera module comprising the focusing device. The focusing device and the camera module can utilize the piezoelectric driving unit and the elastic part to achieve the automatic focusing purpose.
Description
Technical field
The present invention relates to a kind of camera module that is used for the focusing module of filmed image and adopts this focusing mechanism.
Background technology
Automatically focusing has been the standard feature that is loaded in the camera module on the mobile phone, therefore how to design the research topic that the camera module with automatic focus function becomes the researchist in limited volume.
At present, roughly there are two kinds of methods can realize automatic focusing.One is to use micro electromechanical structure that eyeglass is driven, yet this mode cost is higher.The 2nd, in lens cavities, place conductive aqueous solution and nonconducting silicone oil solution, two kinds of liquid refractivity differences, behind the making alive, change the shape of liquid lens curved interface to regulate the focal length of eyeglass by the wet effect of electricity, therefore can avoid being provided with complex mechanical construction, still, the drift of the optical axis of liquid lens is not easy control, the aberration at lens edge position is also bigger, and imaging effect is not good.
Summary of the invention
In view of this, be necessary to provide a kind of can low cost and the good focusing mechanism of imaging effect.
A kind of focusing mechanism, it comprises a housing, and this housing has opposite first and second surface, and these housing central authorities offer one first through hole that runs through this first surface and this second surface; An eyeglass, this eyeglass are positioned at this first through hole, the central lines of the optical axis of this eyeglass and this first through hole; A piezo-electric drive units, this piezo-electric drive units connect this housing and this eyeglass, and deformation takes place in this piezo-electric drive units energising back, moves along optical axis direction in this first through hole thereby drive this eyeglass; An elastic component, this elastic component connect this housing and this eyeglass, this elastic component provide one with the rightabout acting force of this eyeglass moving direction so that eyeglass is still in the precalculated position.
A kind of camera module, this camera module has the fixing len group, this camera module comprises a kind of focusing mechanism, this focusing mechanism is located at the thing side of this fixing len group, this focusing mechanism comprises a housing, this housing has opposite first and second surface, and these housing central authorities offer one first through hole that runs through this first surface and this second surface; An eyeglass, this eyeglass are positioned at this first through hole, the central lines of the optical axis of this eyeglass and this first through hole; A piezo-electric drive units, this piezo-electric drive units connect this housing and this eyeglass, and deformation takes place in this piezo-electric drive units energising back, moves along optical axis direction in this first through hole thereby drive this eyeglass; An elastic component, this elastic component connect this housing and this eyeglass, this elastic component provide one with the rightabout acting force of this eyeglass moving direction so that eyeglass is still in the precalculated position.
Compared to prior art, the camera module of focusing mechanism provided by the invention and this focusing mechanism of employing adopts the mobile realization focusing of piezo-electric drive units and elastic component control eyeglass, cost is low, be convenient to control, focusing mechanism is changed easily, the camera module can be realized zoom because of mobile eyeglass of adding or mobile lens set, and the imaging scope strengthens.
Description of drawings
Fig. 1 is the three-dimensional view of the focusing mechanism that provides of first embodiment of the invention.
Fig. 2 is the three-dimensional view after focusing mechanism shown in Figure 1 turns over turnback and removes elastic component.
Fig. 3 is the three-dimensional view of the elastic component that provides of first embodiment of the invention.
Fig. 4 is the cut-open view of the camera module that provides of second embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
See also Fig. 1, Fig. 2 and Fig. 3, the focusing mechanism 10 that first embodiment of the invention provides comprises 21, one piezo-electric drive units 31 of 11, one eyeglasses of a housing and an elastic component 41.
This housing 11 has opposite first 110 and second surface 112, and the central authorities of this first surface 110 are provided with one first through hole 12, and this first through hole 12 is done logical light and used.
In the present embodiment, this housing 11 is cube structure, but also can be designed to cylindrical structure as required.
This eyeglass 21 is positioned at this first through hole 12, and the central lines of the optical axis I of this eyeglass 21 and this first through hole 12, and it can pass through the mutual traction and fixation of piezo-electric drive units 31 and elastic component 41 in this first through hole 12.
This piezo-electric drive units 31 is fixed in this first surface 110 and is connected with this eyeglass 21, and the deformation that these piezo-electric drive units 31 energising backs take place makes this eyeglass 21 move along optical axis I direction in first through hole 12.
This piezo-electric drive units 31 can be an annular slice structure square in square-outside and round-inside shape or the foreign side.In the present embodiment, this piezo-electric drive units 31 is an annular schistose texture, and ring 311 and outer shroud 312 in it has are the walls of smooth and continuous between interior ring 311 and the outer shroud 312.Should in ring 311 be connected with the periphery of this eyeglass 21, connected mode can be used bonding; The first surface 110 of this outer shroud 312 and this housing 11 is connected and fixed, can be by bonding or with the fixing mode of fixed pin, certainly, this outer shroud 312 also can be fixed on the inwall of this housing 11, and highly suitable, is convenient to focus.
Piezo-electric drive units 31 has also played the effect of anti-dazzling screen simultaneously, and it surrounds a similar funnelform structure, makes incident light only pass through eyeglass 21 incidents.
This piezo-electric drive units 31 is made by piezoelectric (piezoelectric material), the energising back takes place flexible owing to inverse piezoelectric effect or the expansion strain, in focusing mechanism 10, this piezo-electric drive units 31 radially takes place flexible or expansion at it, be connected with eyeglass 21 owing to piezo-electric drive units 31 again, therefore applied a component to this eyeglass 21, be moved in optical axis I direction thereby draw this eyeglass 21 along optical axis I direction.
These piezo-electric drive units 31 energising backs radially take place flexible or the expansion strain at it, thereby drawing this eyeglass 21 moves in optical axis I direction, elastic component 41 also is subjected to elastic deformation, thereby provide one and the rightabout elastic acting force of this eyeglass moving direction to this eyeglass 21, when tractive force and this elastic acting force equal and opposite in direction, will make this eyeglass 21 static in the precalculated position.
The elasticity coefficient of the size of electrical current and elastic component 41 is all set according to actual needs, such as the thickness of housing 11 at optical axis direction, the displacement of eyeglass 21 etc.
Adopt springs if elastic component 41 is set, preferably, around this eyeglass 21, a plurality of springs are set evenly and are connected with housing 11.
Further, this focusing mechanism 10 also comprises an eyeglass retaining piece 50, and this eyeglass retaining piece 50 is cylindric, and this eyeglass 21 is located in this eyeglass retaining piece 50.This eyeglass retaining piece 50 has second through hole 51, the optical axis I of this eyeglass 21 and the central lines of this second through hole 51.The main effect of eyeglass retaining piece 50 is protection eyeglasses 21, simultaneously the link that also is connected with eyeglass 21 as piezo-electric drive units 31 and eyeglass 21 and elastic component 41.
In the present embodiment, this eyeglass retaining piece 50 has outer wall 52, is provided with holder 53 around this outer wall 52, and second annulus 412 of the interior ring 311 of this piezo-electric drive units 31 and elastic component 41 is gripped by this holder 53 respectively.
This holder 53 can be made up of two circular ring plates, and like this, two circular ring plates should be fixedly clamped by interior ring 311 and second annulus 412.Certainly, also can at this outer wall 51 four circular ring plates 530 be set as shown in FIG., per two circular ring plates 530 grip the interior ring 311 and second annulus 412, compare to the setting that two circular ring plates are only arranged, ring 311 and second annulus 412 influenced each other in four circular ring plates 530 can be avoided.
This focusing mechanism 10 can be by being provided with a securing member 15 respectively on four angles of housing 11, for example register pin or screw make this focusing mechanism 10 fix with the camera module.Securing member 15 makes things convenient for the assembling of this focusing module 10 and camera module, also makes things convenient for the replacing of this focusing module 10, in addition, when the camera module only needs the tight shot group, also can take off this focusing mechanism 10.Certainly, also a securing member 15 can only be set.
This focusing mechanism 10 also can be fixed together with the camera module and be non-exchange.
See also Fig. 4, the camera module 60 that second embodiment of the invention provides comprises focusing mechanism 10, and this camera module 60 has fixing len group 61, and this fixing len group 61 comprises a plurality of eyeglasses that are fixed in the lens barrel 62.Focusing mechanism 10 is arranged on the thing side of this fixing len group 61.Specifically, the first surface 110 of housing 11 and piezo-electric drive units 31 are near the thing side, and second surface 112 and elastic component 41 are near the picture side.Certainly, first surface 110 also can be near picture side and second surface 112 near the thing sides, piezo-electric drive units 31 near the picture sides and elastic component 41 near the thing sides.
The camera module 60 of focusing mechanism 10 provided by the invention and this focusing mechanism 10 of employing adopts the mobile realization focusing of piezo-electric drive units 31 and elastic component 41 control eyeglasses, cost is low, be convenient to control, focusing mechanism 10 is changed easily, camera module 60 can be realized zoom because of mobile eyeglass of adding or mobile lens set, and the imaging scope strengthens.
Claims (10)
1. focusing mechanism, it is characterized in that: this focusing mechanism comprises
A housing, this housing has opposite first and second surface, and these housing central authorities offer one first through hole that runs through this first surface and this second surface;
An eyeglass, this eyeglass are positioned at this first through hole, the central lines of the optical axis of this eyeglass and this first through hole;
A piezo-electric drive units, this piezo-electric drive units connect this housing and this eyeglass, and deformation takes place in this piezo-electric drive units energising back, moves along optical axis direction in this first through hole thereby drive this eyeglass;
An elastic component, this elastic component connect this housing and this eyeglass, this elastic component provide one with the rightabout acting force of this eyeglass moving direction so that eyeglass is still in the precalculated position.
2. focusing mechanism as claimed in claim 1 is characterized in that: this piezo-electric drive units is an annular schistose texture, ring and outer shroud in having, and ring is fixed in this eyeglass in this, and this outer shroud is fixed in this first surface.
3. focusing mechanism as claimed in claim 2, it is characterized in that: this elastic component has first annulus and is positioned at second annulus that first annulus and elasticity are connected in first annulus, this first annulus is fixed in this eyeglass, and this second annulus is fixed in this second surface.
4. focusing mechanism as claimed in claim 1, it is characterized in that: this focusing mechanism also comprises an eyeglass retaining piece, this eyeglass retaining piece has second through hole, this eyeglass is located at this second through hole, the central lines of the optical axis of this eyeglass and this second through hole, this piezo-electric drive units is connected with this eyeglass retaining piece, and this elastic component is connected with this eyeglass retaining piece.
5. focusing mechanism as claimed in claim 4 is characterized in that: this eyeglass retaining piece has outer wall, is provided with holder around this outer wall, and this first interior ring and this second interior ring are respectively by this holder clamping.
6. focusing mechanism as claimed in claim 5 is characterized in that: this holder is formed by stacking by a plurality of circular ring plates, and this first interior ring and this second interior ring are respectively by two circular ring plate clampings in this multilayer circular ring plate.
7. focusing mechanism as claimed in claim 1 is characterized in that: this housing has at least one securing member, and this housing is fixed by this at least one securing member and this camera module.
8. camera module, this camera module has the fixing len group, it is characterized in that: this camera module comprises a kind of focusing mechanism, this focusing mechanism is located at the thing side of this fixing len group, this focusing mechanism comprises a housing, this housing has opposite first and second surface, and these housing central authorities offer one first through hole that runs through this first surface and this second surface; An eyeglass, this eyeglass are positioned at this first through hole, the central lines of the optical axis of this eyeglass and this first through hole; A piezo-electric drive units, this piezo-electric drive units connect this housing and this eyeglass, and deformation takes place in this piezo-electric drive units energising back, moves along optical axis direction in this first through hole thereby drive this eyeglass; An elastic component, this elastic component connect this housing and this eyeglass, this elastic component provide one with the rightabout acting force of this eyeglass moving direction so that eyeglass is still in the precalculated position.
9. camera module as claimed in claim 8, it is characterized in that: this camera module also comprises an eyeglass retaining piece, this eyeglass retaining piece has second through hole, this eyeglass is located at this second through hole, the central lines of the optical axis of this eyeglass and this second through hole, this piezo-electric drive units is connected with this eyeglass retaining piece, and this elastic component is connected with this eyeglass retaining piece.
10. camera module as claimed in claim 8 is characterized in that: this piezo-electric drive units is an annular schistose texture, ring and outer shroud in having, and ring is fixed in this eyeglass in this, and this outer shroud is fixed in this first surface; This elastic component has first annulus and is positioned at second annulus that first annulus and elasticity are connected in first annulus, and this first annulus is fixed in this eyeglass, and this second annulus is fixed in this second surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103079866A CN102033286A (en) | 2009-09-29 | 2009-09-29 | Focusing device and camera module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103079866A CN102033286A (en) | 2009-09-29 | 2009-09-29 | Focusing device and camera module |
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| Publication Number | Publication Date |
|---|---|
| CN102033286A true CN102033286A (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103079866A Pending CN102033286A (en) | 2009-09-29 | 2009-09-29 | Focusing device and camera module |
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| CN (1) | CN102033286A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014344A1 (en) * | 2016-07-22 | 2018-01-25 | 深圳市大疆创新科技有限公司 | Camera assembly and photographing apparatus using the camera assembly, and aircraft |
| CN109451231A (en) * | 2018-12-26 | 2019-03-08 | 苏州智华汽车电子有限公司 | A kind of novel focusing vehicle-mounted camera |
| CN111641761A (en) * | 2020-05-27 | 2020-09-08 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN111654604A (en) * | 2020-05-27 | 2020-09-11 | 维沃移动通信有限公司 | Image pickup apparatus, control method, and electronic device |
| CN112825542A (en) * | 2019-11-20 | 2021-05-21 | 中芯集成电路（宁波）有限公司 | Imaging module |
| CN113132568A (en) * | 2019-12-31 | 2021-07-16 | 中芯集成电路（宁波）有限公司 | Imaging module and manufacturing method thereof |
| WO2023040872A1 (en) * | 2021-09-18 | 2023-03-23 | 格科微电子（上海）有限公司 | Camera module and digital device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1773741A (en) * | 2004-11-10 | 2006-05-17 | 太阳诱电株式会社 | Driving device |
| CN101153948A (en) * | 2006-09-28 | 2008-04-02 | 鸿富锦精密工业（深圳）有限公司 | Lens module and camera module group |
| CN201116960Y (en) * | 2007-11-14 | 2008-09-17 | 比亚迪股份有限公司 | Camera lens die set capable of automatic focusing |
-
2009
- 2009-09-29 CN CN2009103079866A patent/CN102033286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1773741A (en) * | 2004-11-10 | 2006-05-17 | 太阳诱电株式会社 | Driving device |
| CN101153948A (en) * | 2006-09-28 | 2008-04-02 | 鸿富锦精密工业（深圳）有限公司 | Lens module and camera module group |
| CN201116960Y (en) * | 2007-11-14 | 2008-09-17 | 比亚迪股份有限公司 | Camera lens die set capable of automatic focusing |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014344A1 (en) * | 2016-07-22 | 2018-01-25 | 深圳市大疆创新科技有限公司 | Camera assembly and photographing apparatus using the camera assembly, and aircraft |
| CN109451231A (en) * | 2018-12-26 | 2019-03-08 | 苏州智华汽车电子有限公司 | A kind of novel focusing vehicle-mounted camera |
| CN109451231B (en) * | 2018-12-26 | 2023-09-12 | 苏州智华汽车电子有限公司 | Focusing vehicle-mounted camera |
| CN112825542A (en) * | 2019-11-20 | 2021-05-21 | 中芯集成电路（宁波）有限公司 | Imaging module |
| CN112825542B (en) * | 2019-11-20 | 2022-10-14 | 中芯集成电路（宁波）有限公司 | Imaging module |
| CN113132568A (en) * | 2019-12-31 | 2021-07-16 | 中芯集成电路（宁波）有限公司 | Imaging module and manufacturing method thereof |
| CN113132568B (en) * | 2019-12-31 | 2022-07-12 | 中芯集成电路（宁波）有限公司 | Imaging module and manufacturing method thereof |
| CN111641761A (en) * | 2020-05-27 | 2020-09-08 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN111654604A (en) * | 2020-05-27 | 2020-09-11 | 维沃移动通信有限公司 | Image pickup apparatus, control method, and electronic device |
| CN111654604B (en) * | 2020-05-27 | 2022-04-22 | 维沃移动通信有限公司 | Image pickup apparatus, control method, and electronic device |
| CN111641761B (en) * | 2020-05-27 | 2022-04-29 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| WO2023040872A1 (en) * | 2021-09-18 | 2023-03-23 | 格科微电子（上海）有限公司 | Camera module and digital device thereof |
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Application publication date: 20110427 |