CN1947044A - Liquid-based optical device, method for controlling such a device and electronic device - Google Patents
Liquid-based optical device, method for controlling such a device and electronic device Download PDFInfo
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- CN1947044A CN1947044A CN 200580012850 CN200580012850A CN1947044A CN 1947044 A CN1947044 A CN 1947044A CN 200580012850 CN200580012850 CN 200580012850 CN 200580012850 A CN200580012850 A CN 200580012850A CN 1947044 A CN1947044 A CN 1947044A
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Abstract
The present invention discloses an optical device comprising a container enclosing an insulating liquid (A) and an electrically susceptible liquid (B), the insulating liquid (A) and the electrically susceptible liquid (B) being immiscible and being in contact with each other via an interface (14), at least one of the liquids (A; B) being at least partially placed in a light path through the container. The optical device further comprises heating means (2, 12, 20) that preferably are responsive to a temperature sensor (30) for heating the insulating liquid (A) and the electrically susceptible liquid (B). Consequently, an optical device is obtained in which the influence of the temperature dependence of the physical properties of the insulating liquid (A) and the electrically susceptible liquid (B) on the behaviour of the optical device is reduced, thus yielding an optical device with improved optical characteristics at low temperatures.
Description
The present invention relates to a kind of optical device, this optical device comprises the container that is packaged with iknsulating liquid and responsive (electrically susceptible) liquid of electricity, wherein, iknsulating liquid and electric sensitive liquid can not be miscible and be in contact with one another via the interface, and these liquid are placed in the light path by container; And the mechanism that is used to control interface location.
The invention further relates to a kind of method of controlling this optical device.
The present invention further relates to a kind of electron device that comprises this optical device.
Optical device based on liquid control has obtained huge commercial interest rapidly, is not because these devices lack the mechanical motion part and these devices relatively simply make these devices cheaply durable at all.
For example, disclose a kind of optical device at U.S. Patent application US 2001/0017985, this optical device will have identical refractive index but two kinds of immiscible liquids of different transmissivities mix, wherein a kind of conduction the in two kinds of liquid.By changing the interface between these two kinds of liquid, change amount of liquid, thereby obtained diaphragm by each liquid on the device light path.
International Patent Application WO 03/069380 discloses a kind of cylindrical lens of variable focal length, and two kinds of unmixing fluids that these lens will have different refractivity mix, wherein a kind of fluid conduction, and one other fluid insulation.These fluids preferably have similar density, thereby avoid the gravity dependence of liquid orientation when lens are directed.Interface shape between these two kinds of fluids is controlled by apply voltage on lens, and this can be used to change the focus of lens.One of them lid in cylindrical wall and cylindrical transparent cover applies with hydrophobic coating, thereby guarantee at least when dissengaged positions, make at conductive fluid, normally the contact area between polar liquid and the described wall minimizes, thereby the lens of variable focal length that helps to realize having big optical power scope.
The conductive fluid of this class device comprises the water with relative higher concentration electrolytic solution usually, thereby makes optical device to work when being lower than 0 ℃, and a problem of this device is that this can cause conducting liquid density greater than 1g/cm
3, this has seriously hindered the selection to suitable dielectric fluid because dielectric fluid normally density be lower than 1g/cm
3Oil.In addition, higher relatively concentration of electrolyte may cause the corrosion of the metal parts of the optical device that contacts with conducting liquid, and this can reduce the performance of device.
The present invention is devoted to provide a kind of optical device that uses lower concentration of electrolyte.
The present invention also is devoted to provide a kind of method that is used to control this optical device.
The present invention further is devoted to provide a kind of electron device that comprises this optical device.
In one aspect of the invention, a kind of optical device is provided, this device comprises the container that is packaged with iknsulating liquid and electric sensitive liquid, the mechanism that is used to control interface location, and the heating arrangements that is used to heat iknsulating liquid and electric sensitive liquid, wherein, iknsulating liquid and electric sensitive liquid can not be miscible and be in contact with one another via the interface, and one of them of these liquid planted in the light path that is placed at least in part by container.
The existence of the heating arrangements that maybe can respond to the temperature sensor in the optical device of the present invention of user's control has just guaranteed that the fluid temperature fluctuation of optical device inside can reduce.Therefore, these density of liquid fluctuations are also less, and this has just caused can realizing better control aspect the gravity deformation of eliminating the liquid orientation.This better control to temperature fluctuation has also solved the problem relevant with the oil base iknsulating liquid, it is very sticking that this oil base iknsulating liquid can become when working temperature is in the low side of optical device working range, therefore, the viscosity that just can reduce to increase is for the deleterious effect of optical device slewing rate.
Equally, because liquid refractive index is temperature correlation, therefore, the significantly variation of temperature can cause the departing from of expection optical property of optical device.
In addition, the cooling of liquid causes reducing of liquid volume and therefore causes pressure to reduce.Therefore, just produced vapor bubbles or dissolved gas bubble in liquid, this has just worsened the optical property of optical device.The more high stability of optical device internal liquid temperature controlling having been guaranteed the optical property of optical device provided by the present invention.
In addition, because the existence of electric sensitive liquid by the heating arrangements that is connected with temperature sensor be prevented from freezing, therefore, optical device of the present invention just permission has lower concentration of electrolyte as the electric sensitive liquid of conducting liquid.Therefore, just reduced the corrosion degradation that the metal parts that contacts with electric sensitive liquid in the optical device causes because of electrolytic solution.In addition, owing to the increase along with concentration of electrolyte causes the increase of electrolytic solution base fluid volume density, therefore, optical device of the present invention allows to use this liquid of less dense, thereby helps the selection to the iknsulating liquid with the density that is complementary.
Although heating arrangements can manual operation, preferably, optical device also comprises temperature sensor, and wherein, heating arrangements is in response to described temperature sensor.This has guaranteed can realize the constant protection to optical device there not being the device user to note under the situation of optical device temperature of living in.
In one embodiment, heating arrangements at least a portion of being included as the mechanism that is used to control described interface location provides the driving circuit of electric current.This electric current can be to offer the steady current of electrode when the optical device idle condition, and can cause the optical device wall of a container is carried out the resistance-type heating, and wherein, optical device carries the mechanism of control interface location.This has such advantage,, can control the temperature of optical device by the mechanism of existing control interface location that is.
In another embodiment, heating arrangements comprises the conductive material layer that is coated on container at least a portion.The use that is specifically designed to the conductive material of heating purposes has such advantage, that is, it can use when optical device is worked, when engaging thereon in the mechanism that controls interface location.
In another aspect of this invention, provide a kind of method that is used to control optical device described in the introductory song paragraph, this method may further comprise the steps: the temperature of measuring iknsulating liquid and electric sensitive liquid; Temperature and the predefined temperature threshold values measured are compared; If the temperature of measuring is lower than described threshold values, then heat iknsulating liquid and electric sensitive liquid.
Make in this way, just can guarantee that the optical device temperature inside can not drop to is lower than predefined temperature, thereby avoided aforesaid deleterious effect to the optical device performance, the normally such temperature of this predefined temperature wherein, if be lower than this predefine temperature, then the performance of liquid, for example density, viscosity and refractive index all can be crossed and depart from its estimated performance greatly.
In one embodiment, the step of measuring temperature comprises, the interface is transformed into the second place from primary importance, and measures the response time at interface.This embodiment is based on such understanding, that is, the optical device response time that is used to change interface location is a temperature correlation.Therefore, the mensuration of this response time is the temperature survey of implying, and it has such advantage, does not promptly need special-purpose temperature sensor; This measurement can for example realize by imageing sensor under the situation of optical device execution lens function, or realize by optical sensor or imageing sensor under the situation of optical device execution diaphragm functionality.Subsequently, at least a portion that the step of heating iknsulating liquid and electric sensitive liquid can be included as the mechanism that is used to control interface location provides electric current, it has such advantage, that is, heating steps can not need to carry out under the situation of add ons in optical device.
In another aspect of this invention, provide the electron device that comprises the optical device described in the introductory song paragraph, this electron device also comprises the driving circuit that links to each other with the mechanism that is used to control interface location, and the temperature sensor that is connected with driving circuit.Driving circuit and temperature sensor needn't be attached in the optical device, but can be arranged in the electron device of the present invention.This has such advantage,, if these elements have been arranged in the electron device, then can expand their function that is, so that realize the temperature required control to optical device.For example, if electron device comprises LCD, the driving circuit that then is used for this display may comprise temperature sensor, and it equally also can be used for optical device.
Optionally, electron device also comprises the optical sensor with temperature sensor, and wherein, temperature sensor is implemented in optical sensor.As described in the method for the present invention, optical sensor can be used for measuring the optical device response time relevant with fluid temperature.This has such advantage,, does not need special-purpose temperature sensor that is.
Also driving circuit can be set, be used in response to temperature sensor giving at least a portion of the mechanism that is used to control interface location that electric current is provided, it has such advantage, that is, do not need other driving circuit to be used as the control assembly of heating arrangements.
In another embodiment, optical device also comprises the conductive material layer that is coated on container at least a portion, and this conductive layer is connected with driving circuit, also is provided with driving circuit, and being used for provides electric current in response to temperature sensor for this conductive material layer.This has such advantage, that is, can use the mechanism that acts on the control interface location simultaneously as the conductive material of optical device heating arrangements, thereby allow to heat in the course of the work optical device.
The present invention has also carried out more detailed description with reference to the accompanying drawings by the example of indefiniteness, wherein:
Fig. 1 has schematically shown the lens of variable focal length of prior art;
Fig. 2 has schematically shown optical device of the present invention;
Fig. 3 has schematically shown another kind of optical device of the present invention;
Fig. 4 has schematically shown electron device of the present invention;
Fig. 5 has schematically shown another kind of electron device of the present invention.
Should be understood that accompanying drawing only is schematically, and does not draw in proportion.Should be understood that equally, in whole accompanying drawing, use identical label to represent same or similar parts.
Shown disclosed lens of variable focal length in International Patent Application WO 03/069380 among Fig. 1.This lens of variable focal length comprises the first fluid A and the second fluid B that is stored in the cylindrical cavity.These fluids are immiscible and have different refractive indexes, but preferably have identical density, with the orientation of avoiding comprising the fluid at interface 14 between the fluid dependence effect to action of gravity.This cylindrical cavity also comprises first end section 4 and second end section 6, wherein the inwall of first end section 4 and cylindrical cavity is coated with the AF1600TM of hydrophobic coating such as E.I.Du Pont Company, this coating can combine with the parylene lamination, thereby retrains conductive fluid B by dielectric fluid A not acting under the voltage condition.The shape at interface 14 can be converted to the concave shape shown in the orientation (b) from the convex shape shown in directed (a) in a continuous manner, this realizes by voltage is changed to magnitude of voltage V2 from magnitude of voltage V1, wherein, described voltage stride across the cylinder electrode 2 that is encapsulated in the cavity wall and with second lid 6 that the second fluid B conduction contact on preferably be transparent ring electrode 12.Therefore, just changed focus by cylindrical light path L.
Transparent end part 4 can be glass or polymer lid, perhaps another kind of suitable can be the transparent material of lens shape.
Typically, the temperature dependency of the physical property of dielectric fluid A is different with the temperature dependency of the physical property of conductive fluid B.Therefore, fluid A and B can have the physical property of the matched well under selected temperature, for example room temperature, if but the working temperature of lens obviously departs from this chosen temperature, then this different temperatures correlated performance may cause physical property to depart from the physical property coupling of expection.
For example, similar density when dielectric fluid A and conductive fluid B can have in temperature T=20 ℃ left and right sides is to avoid the influence of gravity convection body orientation.Yet when in temperature T=-20 ℃ down during work, it is obviously different that density may become, thereby cause the orientation of fluid to be subjected to the influence of gravity, and the performance that this means lens becomes and depends on its residing orientation, and this does not wish to occur very much.
Equally, dielectric fluid A that carefully chooses and the refractive index difference of conductive fluid B may change owing to the significantly change of temperature, thereby cause being offset the required optical property of lens.In addition, dielectric fluid A can be an oil base.At low temperatures, the oil based fluids very viscosity that may become, this bring deleterious effect can for the slewing rate of lens of variable focal length.
It is emphasized that, explained the influence that these are non-required although use the prior art lens of International Patent Application WO 03/069380 as an example, but disclosed diaphragm suffers at least some in these problems equally among other optical device based on liquid, for example U.S. Patent application US 2001/0017985.
In Fig. 2 and accompanying drawing subsequently, the lens of variable focal length among Fig. 1 will show as an embodiment of optical device of the present invention.Yet, it is emphasized that the content of telling about of the present invention also is applicable to other optical device based on liquid.In Fig. 2, lens of variable focal length is expanded and has driving circuit 20, and it is provided for providing voltage for the electrode configuration that comprises wall electrode 2 and bottom plate electrode 12, so that the shape at the interface 14 of control between electric sensitive liquid B and iknsulating liquid A.Also be provided with driving circuit 20, be used in response to temperature sensor 30 be electrode configuration electrode 2 and 12 wherein at least one provides electric current.Electric current by wall electrode 2 and/or bottom plate electrode 12 applies and causes the lens of variable focal length chamber wall to be heated by resistance-type, thereby causes iknsulating liquid A and electric sensitive liquid B to be heated.
In one embodiment, the electric current that is provided is a DC current, and it is for example producing the resistance-type heating on the wall electrode 2.In another embodiment, driving circuit 20 is set, to be used to provide alternating current to change CHARGE DISTRIBUTION on the capacitor, wherein, this capacitor by conducting liquid B, on cavity inner wall insulation course, for example parylene lamination and cause the heated wall electrode 2 of insulation course to form.Advantageously, the alternative frequency of alternating current is higher than, preferably is higher than the response time of the 14 pairs of change in voltage in interface far away, for example in the scope of 5-50kHz.This helps optical device to be heated under active mode, to such an extent as to this is can't respond because voltage changes too fast interface 14.
Fig. 3 has shown another embodiment of optical device of the present invention.Lens of variable focal length shown in Figure 2 extends with transparency conducting layer 100 on the end parts 4 of lens of variable focal length container.Transparency conducting layer 100 can be tin indium oxide (ITO) layer, or another kind of suitable transparent conductive material.In Fig. 3, driving circuit 20 and transparency conducting layer 100 conductions are connected, so that provide electric current for this layer.This formula that can have a resistance in transparency conducting layer 100 heats, thereby has caused the heating of iknsulating liquid A and electric sensitive liquid B.The existence that is specifically designed to the conductive layer 100 of optical device heating has such advantage, promptly, this device can also be heated when work, because wall electrode 2 and bottom plate electrode 12 might not be carried out dual-use function, that is, control shape and the heating iknsulating liquid A and the electric sensitive liquid B at interface 14 simultaneously.
It is emphasized that conductive layer 100 needn't necessarily be positioned on the end parts 4.Other parts that are placed on container are feasible equally.Equally, it needn't be transparent in the time of outside conductive layer 100 is placed on by the light path of container.In addition, driving circuit 20 can comprise a special-purpose driving circuit that is connected with the electrode configuration of control interface 14 shapes, and another provides the special-purpose driving circuit of electric current for conductive layer 100.
It is emphasized that in this that in content of the present invention term " electric sensitive liquid " is intended to comprise conducting liquid, polar liquid and polarization liquid.
In addition, it is emphasized that, although in this application, the mechanism that is used to control 14 positions, interface is described to control by voltage the electrode configuration of interface 14 shapes, but, mechanisms of other control 14 positions, interface are same acceptables, and for example unpub, its priority date is the mechanism described in 14/05/2003 the european patent application 03101335.2.In this european patent application, a kind of lens of variable focal length that comprises two kinds of immiscible liquids with different refractivity is disclosed.These lens have two cavitys of the two kinds of liquid that can distribute on it: first cavity, interface are positioned at this cavity and light path is passed through this cavity; Second cavity, it has two web members with first cavity.Second cavity comprises pump, and it is used to change the various volumes of liquid in these two cavitys.Therefore, the focal length of lens is to change by the moving of position of the interface between these two kinds of liquid with respect to first cavity inner wall, rather than the shape by changing the interface, is that curvature changes.
Optical device shown in Fig. 2 and Fig. 3 can be operated by the method 400 of control optical device of the present invention, wherein, this optical device comprises the container that is packaged with iknsulating liquid A and electric sensitive liquid B, wherein iknsulating liquid A and electric sensitive liquid B can not be miscible, and be in contact with one another liquid A via interface 14; One of them of B planted in the light path that is placed at least in part by container, and optical device also comprises the mechanism that is used to control 14 positions, interface.This method 400 comprises the some steps shown in Fig. 4.
In first step 410, measure the temperature of iknsulating liquid A and electric sensitive liquid B.This can finish by using dedicated temperature sensor, for example temperature sensor 30.Can near temperature sensor 30 being placed on iknsulating liquid A and electric sensitive liquid B, measure temperature, perhaps the external temperature by measurement optics and derive the temperature of iknsulating liquid A and electric sensitive liquid B from this temperature.
Optionally, the temperature of iknsulating liquid A and electric sensitive liquid B is derived from the optical property of optical device.Explained the physical property of iknsulating liquid A and electric sensitive liquid B and the optical property of the optical device connection that is closely related.Because these performances are temperature correlation, therefore, the change of the optical property of optical device is exactly a kind of indication of the temperature of iknsulating liquid A and electric sensitive liquid B.
For example, interface 14 can be transformed into the second place from primary importance.The response time at interface 14, being the time that interface 14 arrives settling positions, is the function of iknsulating liquid A and electric sensitive liquid B temperature; Therefore, measure the temperature that this response time will provide iknsulating liquid A and electric sensitive liquid B.Can use optical sensor, for example imageing sensor, the time that the output of optical device becomes stable once more when analyzing the alteration of form when interface 14, measure this response time.Suppose that optical device is a diaphragm, this also can finish by optical sensor so, and at this moment, the stable of light quantity of coming in by optical device is the indication that interface 14 reaches steady state (SS).As alternative, the response time can be measured by the electric capacity of measuring electric capacity, and wherein, this electric capacity is by wall electrode 2, applies the insulation course of wall electrode 2 and form in response to the liquid of electric field B.
In next procedure 420, temperature and the predefined temperature of measuring compared.Predefined temperature typically is the physical property of iknsulating liquid A and electric sensitive liquid B wherein and still is in minimum temperature in the required specification.If the temperature of measuring is not less than predefined temperature, at this moment do not need heating steps.Yet if the temperature of measuring is lower than predefined temperature, execution in step 430 is so that heating iknsulating liquid A and electric sensitive liquid B for example realize heating by providing by the wall electrode 2 of optical device and/or the electric current of bottom electrode 12.
Step 410-step 430 can repeat, and no longer is lower than predefined temperature up to the temperature of iknsulating liquid A and electric sensitive liquid B.As alternative, in case carried out step 410 and step 420, then step 430 can be carried out concurrently with step 410 and step 420, till iknsulating liquid A and the enough heat of electric sensitive liquid B.
Fig. 5 has shown an embodiment of electron device 1 of the present invention.This electron device comprises also detailed as shown in Figure 1 described optical device.In addition, electron device 1 comprises the imageing sensor 40 of the outlet side that is positioned at the light path by optical device, and this sensor is used for the image that the recording optically device is captured.Imageing sensor 40 links to each other with the driving circuit 20 that is used to control described driving circuit, thereby guarantees that the image that captures by optical device has suitable performance, for example image be the hypothesis optical device when being lens of variable focal length at focal length to punctual image.This electron device can comprise temperature sensor 30, and it can be to be used for active matrix liquid crystal display (AMLCD; Not shown) the part of driving circuit (not shown).Be lower than predefined temperature if the measurement temperature drops to, then this temperature sensor 30 also can be used for providing control signal to driving circuit 20, and the step 410 of method 400 of the present invention and step 420 are similarly.As alternative, driving circuit 20 provides electric current in electrode 2 and the electrode 12 at least one.Optionally, optical device can comprise the conductive layer (not shown) that electric current is applied thereto.
As previously mentioned, if imageing sensor 40 is used to measure the temperature of iknsulating liquid A and electric sensitive liquid B, then can omit temperature sensor 30.The temperature of being measured by imageing sensor 40 also can be used for controlling other any temperature-sensitive components of electron device 1, aforesaid AMLCD for example, and temperature sensor 30 can omit from the driving circuit of AMLCD in this case.
Optionally, electron device can be configured to be used to measure the electric capacity of electric capacity, thereby measure the response time at interface 14, this is because interface 14 electric capacity of electric capacity when primary importance is transformed into the second place reaches the response time that stationary value institute's time spent is equivalent to aforementioned interface, wherein, this electric capacity is formed by the insulation course and the electric sensitive liquid B of wall electrode 2, coating wall electrode 2.
Should be noted that the foregoing description describes but not define the present invention, for a person skilled in the art, can under the prerequisite that does not break away from claims, design many alternative embodiments.In the claims, any label between bracket does not constitute the qualification to claim.Term " comprises " does not get rid of in claim other element listed or the existence of step.The plural form that term " " or " " in the element front does not get rid of this element exists.The present invention can realize by the hardware that comprises several different elements.In the claim of the device of having enumerated many mechanisms, some in these mechanisms can be presented as the same element of hardware.Some method this fact has been described in detail in detail in the dependent claims that differs from one another has not represented to use the combination of these methods.
Claims (13)
1. optical device comprises:
Be packaged with the container of iknsulating liquid (A) and electric sensitive liquid (B), described iknsulating liquid (A) and described electric sensitive liquid (B) unmixing, and be in contact with one another described liquid (A via interface (14); B) one of them planted in the light path that is placed at least in part by described container;
Be used to control the mechanism (2 of position, described interface (14); 12);
Be used to heat the heating arrangements (2,12,20,100) of described iknsulating liquid (A) and described electric sensitive liquid (B).
2. optical device according to claim 1 is characterized in that, described optical device also comprises temperature sensor (30), and described heating arrangements (2,12,20,100) is in response to described temperature sensor.
3. optical device according to claim 1 and 2 is characterized in that, described heating arrangements (2,12,20) comprises driving circuit (20), and described driving circuit is for being used to control the described mechanism (2 of position, described interface (14); 12) at least a portion provides electric current.
4. optical device according to claim 3 is characterized in that described electric current is an alternating current.
5. optical device according to claim 1 and 2 is characterized in that, described heating arrangements (20,100) comprises the conductive material layer (100) at least a portion that covers described container.
6. method (400) of controlling optical device comprising:
Be packaged with the container of iknsulating liquid (A) and electric sensitive liquid (B), described iknsulating liquid (A) and described electric sensitive liquid (B) unmixing, and be in contact with one another described liquid (A via interface (14); B) one of them planted in the light path that is placed at least in part by described container; With
Be used to control the mechanism (2 of position, described interface (14); 12);
Described method (400) comprises the steps:
(410) temperature of described iknsulating liquid of mensuration and described electric sensitive liquid;
(420) temperature and the predefined temperature threshold values with described mensuration compares; And
(430), then heat described iknsulating liquid (A) and described electric sensitive liquid (B) if the temperature of described mensuration is lower than described threshold values.
7. method according to claim 6 (400) is characterized in that, the described step (410) of measuring temperature comprising:
Described interface (14) are transformed into the second place from primary importance; And
Measure the response time of described interface (14).
8. according to claim 6 or 7 described methods, it is characterized in that the described step (430) that heats described iknsulating liquid (A) and described electric sensitive liquid (B) comprises, for being used to control the described mechanism (2 of position, described interface (14); 12) at least a portion provides electric current.
9. an electron device (1) comprising:
Optical device, it comprises:
Be packaged with the container of iknsulating liquid (A) and electric sensitive liquid (B), described iknsulating liquid (A) and described electric sensitive liquid (B) unmixing, and be in contact with one another described liquid (A via interface (14); B) one of them planted in the light path that is placed at least in part by container; With
Be used to control the mechanism (2 of position, described interface (14); 12);
With described mechanism (2; 12) link to each other to be used to control the driving circuit (20) of position, described interface (14); And
The temperature sensor (30,40) that links to each other with described driving circuit (20).
10. electron device according to claim 9 (1) is characterized in that, also comprises optical sensor (40); Described temperature sensor is realized in described optical sensor (40).
11., it is characterized in that it can be the described mechanism (2 that is used to control position, described interface (14) in response to described temperature sensor (30,40) that described driving circuit (20) also is arranged to according to claim 9 or 10 described electron devices (1); 12) at least a portion provides electric current.
12. electron device according to claim 11 is characterized in that, described electric current is an alternating current.
13. according to claim 9 or 10 described electron devices, it is characterized in that, described optical device also comprises the conductive material layer (100) at least a portion that covers described container, described conductive layer (100) links to each other with described driving circuit (20), it can be that described conductive material layer (100) provides electric current in response to described temperature sensor (30,40) that the described driving circuit of described driving circuit (20) (20) also is arranged to.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0409204A GB0409204D0 (en) | 2004-04-24 | 2004-04-24 | Liquid-based optical device, method for controlling such a device and electronic device |
| GB0409204.5 | 2004-04-24 | ||
| GB0424291.3 | 2004-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1947044A true CN1947044A (en) | 2007-04-11 |
Family
ID=32344373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580012850 Pending CN1947044A (en) | 2004-04-24 | 2005-04-22 | Liquid-based optical device, method for controlling such a device and electronic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1947044A (en) |
| GB (2) | GB0409204D0 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915989A (en) * | 2010-07-28 | 2010-12-15 | 东南大学 | Electric field force-controlled liquid lens |
| US10690816B2 (en) | 2013-12-31 | 2020-06-23 | Cognex Corporation | Systems and methods reduce temperature induced drift effects on a liquid lens |
| US10754071B2 (en) | 2013-12-31 | 2020-08-25 | Cognex Corporation | Systems and methods reduce temperature induced drift effects on a liquid lens |
| CN113396353A (en) * | 2018-10-09 | 2021-09-14 | 康宁股份有限公司 | Liquid lens |
| CN113424514A (en) * | 2018-12-17 | 2021-09-21 | Lg伊诺特有限公司 | Camera module including liquid lens and method of controlling the same |
| CN114910986A (en) * | 2022-04-22 | 2022-08-16 | 上海酷聚科技有限公司 | Liquid lens |
-
2004
- 2004-04-24 GB GB0409204A patent/GB0409204D0/en not_active Ceased
- 2004-11-02 GB GB0424291A patent/GB0424291D0/en not_active Ceased
-
2005
- 2005-04-22 CN CN 200580012850 patent/CN1947044A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915989A (en) * | 2010-07-28 | 2010-12-15 | 东南大学 | Electric field force-controlled liquid lens |
| US10690816B2 (en) | 2013-12-31 | 2020-06-23 | Cognex Corporation | Systems and methods reduce temperature induced drift effects on a liquid lens |
| US10754071B2 (en) | 2013-12-31 | 2020-08-25 | Cognex Corporation | Systems and methods reduce temperature induced drift effects on a liquid lens |
| US11681081B2 (en) | 2013-12-31 | 2023-06-20 | Cognex Corporation | Systems and methods to reduce temperature induced drift effects on a liquid lens |
| US11754755B2 (en) | 2013-12-31 | 2023-09-12 | Cognex Corporation | Systems and methods to reduce temperature induced drift effects on a liquid lens |
| CN113396353A (en) * | 2018-10-09 | 2021-09-14 | 康宁股份有限公司 | Liquid lens |
| CN113396353B (en) * | 2018-10-09 | 2023-10-20 | 康宁股份有限公司 | liquid lens |
| CN113424514A (en) * | 2018-12-17 | 2021-09-21 | Lg伊诺特有限公司 | Camera module including liquid lens and method of controlling the same |
| CN113424514B (en) * | 2018-12-17 | 2024-01-09 | Lg伊诺特有限公司 | Camera module including liquid lens and control method thereof |
| CN114910986A (en) * | 2022-04-22 | 2022-08-16 | 上海酷聚科技有限公司 | Liquid lens |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0424291D0 (en) | 2004-12-01 |
| GB0409204D0 (en) | 2004-05-26 |
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