CN115685531B - Liquid lens - Google Patents
Liquid lensInfo
- Publication number
- CN115685531B CN115685531B CN202211438602.6A CN202211438602A CN115685531B CN 115685531 B CN115685531 B CN 115685531B CN 202211438602 A CN202211438602 A CN 202211438602A CN 115685531 B CN115685531 B CN 115685531B
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- liquid
- electrode
- glass substrate
- glass
- annular groove
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Abstract
The invention provides a liquid lens, which comprises a first electrode and a second electrode, wherein the first electrode comprises a first glass substrate, an annular groove is formed in the first glass substrate, and at least the periphery of the annular groove and the part of the first glass substrate where the annular groove is formed are made of ultrathin flexible glass materials. The ultrathin flexible glass has the characteristics of flexibility, good rebound resilience and the like, so that when the optical liquid expands or contracts, the first glass substrate can adaptively deform along with the change of the volume of the optical liquid, the problem of the change of the volume of the optical liquid is effectively solved, the problems of poor imaging quality and the like caused by the change of the volume of the optical liquid are avoided, the reliability of the liquid lens and the imaging quality of electronic equipment are improved, and the liquid lens provided by the invention has the advantages of simple structure, easiness in manufacturing, capability of greatly improving the manufacturing efficiency and reducing the manufacturing cost.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a liquid lens.
Background
The liquid lens based on the electrowetting principle uses one or two liquids as a base material, and the purpose of zooming is achieved by changing the curvature of the liquid surface, so that the problems that the traditional solid lens is difficult to miniaturize, has low zooming speed, is high in price, has short service life, is inconvenient to accurately control and the like can be solved.
Because the liquid lens is filled with liquid, the thermal expansion coefficient of the liquid is generally higher than that of the solid, the liquid lens can generally deform a cavity structure after being heated, so that the tightness of the structure, the adhesion of glue and the flatness of window glass are affected, and the problems of air bubbles, liquid leakage in the lens, failure of a glass bonding surface, glass cracking and the like are caused, and the imaging quality of the liquid lens is affected. In the prior art, the influence caused by liquid expansion is generally reduced by means of structural design and the like, but the problems of large volume, complex structure, difficult processing and the like are caused, so that the performance and reliability of the liquid lens are ensured while the structural complexity of the liquid lens is reduced, and the problem to be solved by the person in the technical field is urgent.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, the present invention provides a liquid lens including a first electrode and a second electrode, the first electrode including a first glass substrate having an annular groove thereon, at least a periphery of the annular groove and a portion of the first glass substrate where the annular groove is located being made of an ultrathin flexible glass material. The ultrathin flexible glass has the characteristics of flexibility, good rebound resilience and the like, so that when the optical liquid expands or contracts, the first glass substrate can adaptively deform along with the change of the volume of the optical liquid, the problem of the change of the volume of the optical liquid is effectively solved, the problems of poor imaging quality and the like caused by the change of the volume of the optical liquid are avoided, the reliability of the liquid lens and the imaging quality of electronic equipment are improved, and the liquid lens provided by the invention has the advantages of simple structure, easiness in manufacturing, capability of greatly improving the manufacturing efficiency and reducing the manufacturing cost.
To achieve the above and other related objects, the present invention provides a liquid lens comprising:
The first electrode comprises a first glass substrate, the upper surface of the first glass substrate is provided with an annular groove, the annular groove and the first glass substrate have the same circle center, wherein the first glass substrate positioned in the annular groove is a first part, the first glass substrate positioned outside the annular groove is a second part, the first glass substrate positioned in the annular groove is a third part, the second part and the third part are made of flexible glass, the thickness of the third part is between 0.05mm and 0.1mm, and the thickness of the second part is larger than the thickness of the third part and smaller than 0.3mm;
and the second electrode and the first electrode are arranged opposite to each other in an insulating way and form a closed cavity.
Optionally, the first portion is made of flexible glass, and a thickness of the first portion is equal to a thickness of the second portion.
Optionally, a sealing gasket is arranged between the first electrode and the second electrode, and the sealing gasket is made of an insulating material.
Optionally, the first electrode further includes a first conductive film formed between the first glass substrate and the sealing gasket.
Alternatively, the second electrode includes a second glass substrate formed with a groove in a thickness direction and a second conductive film formed on a surface of the second glass substrate opposite to the first electrode and on a sidewall of the groove.
Optionally, the groove sidewall forms an angle α with the groove bottom surface, and 90 ° < α <180 °.
Optionally, the closed cavity stores therein an optical liquid, the optical liquid including:
A first liquid in contact with the first electrode;
And a second liquid in contact with the second electrode, the second liquid being insoluble in the first liquid and forming a liquid interface with the first liquid.
Optionally, a dielectric film and a hydrophobic film are plated on one side of the second electrode facing the closed cavity in sequence, and the hydrophobic film covers the dielectric film.
Optionally, the flexible glass is any one of alkali-free glass, borosilicate glass, lithium aluminosilicate glass and calcium sodium silicate glass.
The liquid lens provided by the invention has at least the following technical effects:
The liquid lens provided by the invention comprises a first electrode and a second electrode, wherein the first electrode comprises a first glass substrate, an annular groove is formed in the first glass substrate, and at least the periphery of the annular groove and the part of the first glass substrate where the annular groove is formed are made of ultrathin flexible glass materials. The ultrathin flexible glass has the characteristics of flexibility, good rebound resilience and the like, so that when the optical liquid expands or contracts, the first glass substrate can adaptively deform along with the change of the volume of the optical liquid, the problem of the change of the volume of the optical liquid is effectively solved, the problems of poor imaging quality and the like caused by the change of the volume of the optical liquid are avoided, the reliability of the liquid lens and the imaging quality of electronic equipment are improved, and the liquid lens provided by the invention has the advantages of simple structure, easiness in manufacturing, capability of greatly improving the manufacturing efficiency and reducing the manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of a liquid lens according to a first embodiment.
Fig. 2 is a top view of a first glass substrate in a liquid lens according to an embodiment.
FIG. 3 is a schematic view showing the structure of the expansion of the optical liquid in the liquid lens according to the first embodiment
Fig. 4 is a schematic structural diagram of a liquid lens according to a second embodiment.
Description of element reference numerals
10. First electrode
20. Second electrode
30. Sealing gasket
40. Optical liquid
41. First liquid
42. Second liquid
51. Dielectric film
52. Hydrophobic membrane
11. First glass substrate
12. First conductive film
21. Second glass substrate
22. Second conductive film
110. Annular groove
111. First part
112. Second part
113. Third part
Aaxis A
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It should be noted that, the illustrations provided in the present embodiment only illustrate the basic concept of the present invention by way of illustration, but only the components related to the present invention are shown in the illustrations, rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number, positional relationship and proportion of each component in actual implementation may be changed at will on the premise of implementing the present technical solution, and the layout of the components may be more complex.
Example 1
The present embodiment provides a liquid lens, as shown in fig. 1, including a first electrode 10 and a second electrode 20, the first electrode 10 and the second electrode 20 being disposed opposite to each other in insulation and forming a closed cavity of the liquid lens.
As shown in fig. 1, the first electrode 10 includes a first glass substrate 11 and a first conductive film 12, and the first conductive film 12 is made of a transparent material such as ITO to allow light to pass therethrough, as an example. As shown in fig. 2, the upper surface of the first glass substrate 11 has an annular groove 110, the annular groove 110 and the first glass substrate 11 have the same center, wherein the first glass substrate located inside the annular groove 110 is a first portion 111, the first glass substrate located outside the annular groove 110 is a second portion 112, and the first glass substrate located inside the annular groove 110 is a third portion 113. In the present embodiment, the first portion 111 may be made of a conventional glass material such as soda lime-based sheet glass, borosilicate-based sheet glass, etc., and the second and third portions 112 and 113 are made of flexible glass such as any one selected from alkali-free glass, borosilicate glass, lithium aluminosilicate glass, and calcium sodium silicate glass, and the first, second, and third portions 111, 112, and 113 are bonded by a process to form the first glass substrate 11. In addition, the thickness d 3 of the third portion 113 is between 0.05mm and 0.1mm, the thickness d 2 of the second portion 112 is greater than the thickness d 3 of the third portion and less than 0.3mm, that is, the second portion 112 and the third portion 113 are made of ultra-thin flexible glass (UltraThinFlexibleGlass).
As an example, the optical liquid 40 is stored in the closed cavity of the liquid lens, and the optical liquid 40 expands or contracts due to the temperature change during the operation of the liquid lens, and the second portion 112 and the third portion 113 in the first glass substrate can deform according to the expansion or contraction of the optical liquid 40 due to the characteristics of the ultrathin flexible glass, such as being bendable and having good rebound resilience. As shown in fig. 3, when the volume of the optical liquid 40 expands, it pushes the first portion 111 of the first glass substrate to move along the optical axis a in a direction away from the second electrode 20, the second portion 112 and the third portion 113 of the first glass substrate are in a stretched state, and similarly, when the volume of the optical liquid 40 contracts, the first portion 111 of the first glass substrate moves along the optical axis a in a direction close to the second electrode 20, the second portion 112 and the third portion 113 of the first glass substrate are also in a stretched state, thereby solving the problem of the volume change of the optical liquid.
As shown in fig. 1, the second electrode 20 includes a second glass substrate 21 and a second conductive film 22, the second glass substrate 21 is formed with a groove in a thickness direction (i.e., a Y-axis direction shown in fig. 1), and the second conductive film 22 is formed on a surface of the second glass substrate 21 opposite to the first electrode 10, and on a sidewall of the groove. As an example, the second glass substrate 21 may be made of a conventional glass material such as soda lime-based sheet glass, borosilicate-based sheet glass, or the like, and the second conductive film 22 may be made of a transparent material such as ITO to allow light to pass therethrough.
As shown in fig. 1, a sealing gasket 30 is disposed between the first electrode 10 and the second electrode 20 to electrically isolate the first electrode 10 and the second electrode 20 from each other, so as to prevent electrical breakdown between the first electrode 10 and the second electrode 20 and avoid the problem of leakage of the liquid lens. As an example, the sealing gasket 30 is preferably an insulating material with a good adhesion effect, so as to achieve a good sealing of the liquid lens closed cavity while playing an insulating effect, and in this embodiment, the material of the sealing gasket 30 is UV glue.
As shown in fig. 1, the optical liquid 40 is stored in the closed cavity, and the optical liquid 40 includes a first liquid 41 and a second liquid 42, wherein the first liquid 41 is in contact with the first electrode 10, the second liquid 42 is in contact with the second electrode 20, and the second liquid 42 is insoluble in the first liquid 41 and forms a liquid interface with the first liquid 41. As an example, the first liquid 41 includes at least water and an electrolyte, and the electrolyte may be selected from materials having stable chemical properties and being not easily volatilized, decomposed, crystallized, or precipitated, such as lithium bromide, sodium sulfate, potassium chloride, and the like, and the second liquid 42 includes at least silicone oil, such as any one of amino silicone oil, epoxy modified silicone oil, carboxyl modified silicone oil, alcohol modified silicone oil, phenol modified silicone oil, mercapto modified silicone oil, acryloxy and methacryloxy modified silicone oil, methyl long-chain alkyl silicone oil, methyl trifluoropropyl silicone oil, and polyether modified silicone oil.
As shown in fig. 1, in the second electrode 20, the side wall of the groove forms an angle α with the bottom surface thereof, and 90 ° < α <180 °. The contact area between the second electrode 20 and the first liquid 41 in the optical liquid can be increased, and the electrical triggering efficiency of the second electrode 20 on the first liquid 41 can be improved.
As shown in fig. 1, the surface of the second electrode 20 contacting the optical liquid 40 is sequentially coated with a dielectric film 51 and a hydrophobic film 52, the dielectric film 51 being covered with the hydrophobic film 52, the dielectric film 51 being capable of preventing the second electrode 20 from being electrically broken down, the hydrophobic film 52 being for obtaining a larger initial contact angle so that the hysteresis of the liquid lens is smaller. By way of example, the dielectric film 51 may be selected from one or more of parylene, tantalum pentoxide, silicon nitride, and the hydrophobic film 52 may be Cytop, AF1600, or other fluoride, with the hydrophobic film 52 having a contact angle with water of greater than 100. In other alternative embodiments, only one film may be used as both the dielectric film and the hydrophobic film, the material of which may be selected from parylene, AF1600, etc.
Example two
The present embodiment also provides a liquid lens, as shown in fig. 4, including a first electrode 10 and a second electrode 20, the first electrode 10 and the second electrode 20 being disposed opposite to each other in insulation and forming a closed cavity of the liquid lens. The same points as those of the first embodiment are not described here. The difference is that:
As shown in fig. 4, the first glass substrate 11 is integrally molded, and the first portion 111, the second portion 112, and the third portion 113 are each made of flexible glass, for example, any one selected from alkali-free glass, borosilicate glass, lithium aluminosilicate glass, and calcium sodium silicate glass. In the present embodiment, the thickness d 3 of the third portion 113 is between 0.05mm and 0.1mm, the thickness d 2 of the second portion 112 is greater than the thickness d 3 of the third portion and less than 0.3mm, and the thickness d 1 of the first portion 111 is equal to the thickness d 2 of the second portion 112, that is, the first glass substrate 11 is made of ultra-thin flexible glass (UltraThinFlexibleGlass). When the optical liquid 40 in the liquid lens expands or contracts, the first glass substrate 11 can deform according to the expansion or contraction of the optical liquid 40, so as to solve the problem of volume change of the optical liquid, because the ultrathin flexible glass has the characteristics of being bendable, good in rebound resilience and the like.
The liquid lens provided by the invention comprises a first electrode and a second electrode, wherein the first electrode comprises a first glass substrate, an annular groove is formed in the first glass substrate, and at least the periphery of the annular groove and the part of the first glass substrate where the annular groove is formed are made of ultrathin flexible glass materials. The ultrathin flexible glass has the characteristics of flexibility, good rebound resilience and the like, so that when the optical liquid expands or contracts, the first glass substrate can adaptively deform along with the change of the volume of the optical liquid, the problem of the change of the volume of the optical liquid is effectively solved, the problems of poor imaging quality and the like caused by the change of the volume of the optical liquid are avoided, the reliability of the liquid lens and the imaging quality of electronic equipment are improved, and the liquid lens provided by the invention has the advantages of simple structure, easiness in manufacturing, capability of greatly improving the manufacturing efficiency and reducing the manufacturing cost.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211438602.6A CN115685531B (en) | 2022-11-17 | 2022-11-17 | Liquid lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211438602.6A CN115685531B (en) | 2022-11-17 | 2022-11-17 | Liquid lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115685531A CN115685531A (en) | 2023-02-03 |
| CN115685531B true CN115685531B (en) | 2025-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211438602.6A Active CN115685531B (en) | 2022-11-17 | 2022-11-17 | Liquid lens |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283603A (en) * | 2018-11-02 | 2019-01-29 | 上海酷聚科技有限公司 | A kind of zooming liquid lens and its assemble method |
| CN110441902A (en) * | 2019-08-08 | 2019-11-12 | 上海酷聚科技有限公司 | A kind of liquid lens and preparation method thereof |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2878338B1 (en) * | 2004-11-24 | 2007-03-02 | Varioptic Sa | VARIABLE FOCAL LENS MOUNT |
| FR2887636B1 (en) * | 2005-06-23 | 2007-08-31 | Varioptic Sa | VARIABLE FOCAL LENS ASSEMBLY |
| JP2013182067A (en) * | 2012-02-29 | 2013-09-12 | Fujifilm Corp | Optical device |
| JP7433906B2 (en) * | 2017-02-09 | 2024-02-20 | コーニング インコーポレイテッド | liquid lens |
| US20220035079A1 (en) * | 2018-09-21 | 2022-02-03 | Corning Incorporated | Variable volume liquid lenses |
| KR20220024781A (en) * | 2019-06-26 | 2022-03-03 | 코닝 인코포레이티드 | Electrowetting optical element and manufacturing method thereof |
| US11675182B2 (en) * | 2019-11-22 | 2023-06-13 | Corning Incorporated | Liquid lenses with shock protection |
| CN112433274A (en) * | 2020-11-12 | 2021-03-02 | 上海酷聚科技有限公司 | Liquid lens, preparation method thereof and optical device |
| CN112526655A (en) * | 2020-11-18 | 2021-03-19 | 上海酷聚科技有限公司 | Liquid lens, use method of liquid lens and preparation method of liquid lens |
| CN114815015B (en) * | 2022-04-12 | 2023-05-02 | 四川大学 | A Liquid Lens with Adjustable Aperture |
| CN114815016A (en) * | 2022-04-22 | 2022-07-29 | 上海酷聚科技有限公司 | Liquid lens and preparation method thereof |
| CN114910987B (en) * | 2022-04-22 | 2024-08-30 | 上海酷聚科技有限公司 | Liquid lens and manufacturing method thereof |
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2022
- 2022-11-17 CN CN202211438602.6A patent/CN115685531B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283603A (en) * | 2018-11-02 | 2019-01-29 | 上海酷聚科技有限公司 | A kind of zooming liquid lens and its assemble method |
| CN110441902A (en) * | 2019-08-08 | 2019-11-12 | 上海酷聚科技有限公司 | A kind of liquid lens and preparation method thereof |
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| Publication number | Publication date |
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| CN115685531A (en) | 2023-02-03 |
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