KR20120077657A

KR20120077657A - Electro-controlled liquid lens with variable focal length by using magnetic interaction

Info

Publication number: KR20120077657A
Application number: KR1020100139700A
Authority: KR
Inventors: 최현환
Original assignee: 최현환
Priority date: 2010-12-30
Filing date: 2010-12-30
Publication date: 2012-07-10

Abstract

The present invention provides a transparent elastic film made by the movement of the ring-shaped permanent magnet in the vertical direction of the coil by using a magnetic force induced in the rotating spiral electromagnet coil of the current and the fluid refraction liquid comprising the elastic film The present invention relates to an electro-variable fluid lens that continuously changes the focus of light incident from an object to an image sensor by forming an electrically variable optical lens having a continuous focal length due to spatial volume change. A structure of a fluid lens having an electrovariable focus using the action is provided.

Description

ELECTRO-CONTROLLED LIQUID LENS WITH VARIABLE FOCAL LENGTH BY USING MAGNETIC INTERACTION}

The present invention relates to a variable focus lens having an electrically adjustable refractive index due to the bending of the transparent film according to the pressure applied to the ring-shaped permanent magnet using the principle of an electromagnet in which magnetic force is induced when current flows in the conductive coil. More specifically, an electromagnet coil is provided between a pair of ring-shaped permanent magnets combined with an elastic transparent film, thereby controlling the curvature caused by the mechanical flow of the fluid refraction liquid, thereby varying the light emitted from the subject. An electrically adjustable focus variable fluid lens utilizing the interaction of a pair of permanent magnets forming concave and convex lenses to create different focal lengths.

A lens is a tool for collecting or dispersing light, usually made of glass. Similar tools made for electromagnetic waves are called lenses, which use the properties of light to go straight and refracting to magnify and reduce the image.

Light passes straight through the same medium, but reflects and refracts when it encounters another medium. In connection with the lens, light passing through the air goes straight. When it meets the lens, it is reflected and refracted.

Glass, which is the main material of the lens, passes through most of the light, so there is little reflection and most of it is refracted. Since light is refracted toward the thicker side of the lens, convex lenses with a thicker center portion of the lens collect light toward the center. The light spreads out.

The camera module in a conventional slim mobile phone mostly stays in a low pixel due to the thickness problem and is a single focus product without optical function. Therefore, it is pointed out that slim phones have less camera functions than ordinary phones.

In particular, although it is difficult to reduce the thickness compared to the voice coil motor method, a high-precision stepping motor method is used.

Therefore, the present invention has been made to solve the above problems, the object of the present invention is not provided with a focus implementation method by the distance difference of the conventional fixed lens, it is provided on the image sensor in the form similar to the human lens. The mechanical deformation of the internal fluid refractive fluid by the movement in the direction of incidence of light of the permanent magnet by applying electromagnetic pressure to a pair of ring-shaped permanent magnets combined with a transparent elastic film comprising transparent transparent fluid refractive fluid. There is provided an electrically adjustable focus variable fluid lens whose refractive index changes by.

In order to achieve the problem to be solved by the present invention,

According to an embodiment of the present invention, a fluid lens having an electro-variable focus by interaction of a permanent magnet,

A pair of transparent elastic films comprising a transparent flowable refraction liquid,

A pair of ring-shaped permanent magnets arranged in the same magnetic pole combined with the transparent elastic film on both sides,

An electromagnet coil coupled between the permanent magnets,

It consists of a pair of electronic coil spacer coupled to the electromagnet coil to solve the problem of the present invention.

By applying an electric current to an electromagnet coil placed between a pair of ring-shaped permanent magnets arranged in the same magnetic pole, it is possible to control the magnitude of the magnetic attraction generated by the ring-shaped permanent magnets initially and to be transparent and elastic by the induced magnetic force. The vertical motion of the permanent magnet combined with the film is made, and the convex and concave lenses of the fluid refraction fluid are realized through the expansion and contraction of the transparent film by the vertical motion of the permanent magnet.

That is, the present invention can form lenses in various stages by using the free curvature of the lens according to the change in the magnitude of the current, and can use this to implement a focal variable fluid lens similar to the human lens.

According to the present invention including the above-described configuration, the following effects can be obtained.

The variable-focal flow-type lens using electromagnetic pressure can form lenses of various stages by using the free curvature of the lens according to the change in the magnitude of the current, and can use this to implement a natural and clear single-focal variable fluid lens.

In addition, since a lens having a continuously variable focus can be implemented through a single lens, it can be applied to a mobile phone to implement a thin autofocusing device.

In addition, a single lens and its implementation are simple to provide economics in reducing manufacturing costs.

1 is a perspective view showing a fluid lens having an electro-variable focus by interaction of a permanent magnet according to an embodiment of the present invention.
2 is a cross-sectional view showing a fluid lens having an electro-variable focus by interaction of a permanent magnet having a convex lens according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing a fluid lens having an electro-variable focus by the interaction of the permanent magnet constituting the convex lens by the attraction of a pair of permanent magnets according to an embodiment of the present invention.
Figure 4 is a perspective view of the color of the fluid lens having an electro-variable focus by the interaction of the permanent magnet according to an embodiment of the invention.
5 is a color exploded perspective view showing a fluid lens having an electrovariable focus by interaction of a permanent magnet according to an embodiment of the present invention.
6 is a color exploded perspective view illustrating a coupling structure of an electromagnet coil and a spacer of a fluid lens having an electrovariable focus by interaction of a permanent magnet according to an embodiment of the present invention.
7 is a cross-sectional view of a fluid lens having an electrovariable focus by interaction of a permanent magnet according to another embodiment of the present invention.
8 is a cross-sectional view showing a fluid lens having an electro-variable focus by interaction of a permanent magnet having a concave lens according to another embodiment of the present invention.
9 is a cross-sectional view showing a fluid lens having an electro-variable focus by the interaction of a pair of convex lenses on both sides and a permanent magnet composed of a concave lens in the center according to another embodiment of the present invention.
FIG. 10 is a cross-sectional view of a fluid lens having an electrovariable focus by interaction of a permanent magnet composed of a pair of convex lenses on both sides of a maximum curvature and a concave lens in the center according to another embodiment of the present invention; FIG.
FIG. 11 is a color perspective view showing a unitary structure of a fluid lens having an electro-variable focus by interaction of a pair of convex lenses at both sides and a permanent magnet at the center according to another embodiment of the present invention. FIG.

Fluid lens having an electro-variable focus by the interaction of the permanent magnet of the present invention for achieving the above object,

It is symmetrical on both sides,

A first transparent fluid refractive solution 100a on one side,

A first transparent elastic film 104a covering the fluid refraction liquid,

First ring-shaped permanent magnet 106a bonded to the transparent film,

And a first coil spacer 103a comprising a fluid refractive fluid,

One end of the lens module includes a first protective frame 105a and a first protective glass 107a incorporating a permanent magnet,

A separation glass 101 for separating the flowable refractive solution on the other side of the first flowable refractive solution 100a,

Rotating spiral electromagnet coil 102 formed on one side of the separation glass,

On the other side of the separation glass 101, the second transparent fluid refractive solution (100b),

A second transparent elastic film 104b covering the refractive liquid, and

A second annular permanent magnet 106b combined with the transparent elastic film,

A second protective spacer 103b comprising a fluid refractive fluid,

And it comprises the 2nd protective frame 105b and the 2nd protective glass 107b, and solves the subject of this invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the fluid lens having an electro-variable focus by the interaction of the permanent magnet of the present invention.

2 is a cross-sectional view showing a fluid lens having an electro-variable focus by interaction of a permanent magnet having a convex lens according to an embodiment of the present invention.

Referring to FIG. 2, a fluid lens having an electro-variable focus by interaction of permanent magnets is a ring-type permanent magnet installed inside using an electromagnet coil, rather than a conventional movement method of the lens itself using a voice coil. By moving in a direction perpendicular to the coil, a convex lens is constructed using a change in refractive index caused by a change in the spatial density of the internal fluid refractive solution due to the contraction or expansion of the transparent elastic film combined with the permanent magnet.

3 is a cross-sectional view showing a fluid lens having an electro-variable focus by interaction of permanent magnets constituting a convex lens by the attraction of a pair of permanent magnets according to an embodiment of the present invention.

Referring to FIG. 3, a fluid covered with an elastic film including a pair of flowable refraction liquids on both sides of the electromagnet coil 102 and having ring-shaped first and second permanent magnets aligned in the same magnetic pole direction. A lens is provided.

In the initial state in which no electric current flows in the electromagnet coil 102, that is, the electromagnet is not formed, the first annular permanent magnet 106a and the second annular permanent magnet 106b are aligned in the same direction, and are caused by magnetic attraction. Pull out and form convex lenses on both sides.

Due to the characteristic of the magnetic force that is attenuated in proportion to the square of the distance, the pressure of the fluid refraction liquid increases as the distance between the first and second annular permanent magnets becomes closer by the attraction of the two annular permanent magnets. The above structure, which increases and the strength of the magnetic force of the two annular permanent magnets also increases, is an essential structure in the fluid lens driven by the magnetic force.

5 is a color exploded perspective view illustrating a fluid lens having an electrovariable focus by interaction of a permanent magnet according to an embodiment of the present invention.

Referring to FIG. 5, a fluid lens having an electro-variable focus by interaction of permanent magnets flows a pair of fluid lenses through a vertical motion of first and second annular permanent magnets formed at both sides of the electromagnet coil. By controlling the direction and the amount of current, it is characterized in that to control the mutual magnetic force between the first ring-shaped permanent magnet and the second ring-shaped permanent magnet.

6 is a color exploded perspective view illustrating a coupling structure of an electromagnet coil and a spacer of a fluid lens having an electrovariable focus by interaction of permanent magnets according to an embodiment of the present invention.

Referring to FIG. 6, the electromagnet coil 102 is formed in a rotating spiral shape surrounding the central separation glass 101. In addition, the separation glass is supported by the first coil spacer and the second coil spacer.

7 is a cross-sectional view of a fluid lens having an electrovariable focus by interaction of a permanent magnet according to another embodiment of the present invention.

Referring to FIG. 7, the fluid lens having the electro-variable focus by the interaction of the permanent magnets controls the first and second annular permanent magnets installed therein by adjusting the direction and amount of current flowing through the electromagnet coil 102. Causing movement in a direction perpendicular to the coil and causing the first and second transparent elastic films combined with the first and second annular permanent magnets to contract or expand, thereby causing internal first and second transparent flow refraction A concave lens is formed by using a refractive index change generated by a change in the spatial density of the liquid.

8 is a cross-sectional view of a fluid lens having an electro-variable focus by interaction of a permanent magnet having a concave lens according to another embodiment of the present invention.

Referring to FIG. 8, a fluid lens including a pair of flowable refractive solutions on both sides of the electromagnet coil 102 and a ring-shaped permanent magnet coupled in the same magnetic direction is provided.

The first annular permanent magnet 106a and the second annular permanent magnet 106b having the same magnetic direction in the initial state in which no current flows to the electromagnet coil 102, that is, the electromagnet is not formed, are held by magnetic attraction. Pull and form concave lenses on both sides.

Due to the characteristic of the magnetic force that is attenuated in proportion to the square of the distance, the pressure of the first and second transparent flowable refraction liquids increases as the distance between the first annular permanent magnet and the second annular permanent magnet becomes closer. However, the above structure in which the strength of the magnetic force also increases with the distance between the first and second annular permanent magnets is an essential structure in the fluid lens driven by the magnetic force.

9 is a cross-sectional view showing a fluid lens having an electro-variable focus by interaction of a pair of convex lenses on both sides and a permanent magnet composed of a concave lens in the center according to another embodiment of the present invention.

Referring to FIG. 9, three ring-shaped permanent magnets aligned in the same magnetic direction are respectively combined with a transparent elastic film, and each transparent elastic film includes a transparent flowable refractive solution therein.

In detail, the structure of the first ring-shaped permanent magnet 116a is coupled to the first transparent elastic film 114a on the upper side, and the transparent elastic film surrounds the first transparent flowable refraction liquid 110a therein. The first separation glass 111a for separating the flowable refractive liquid is coupled to the lower side, and between the first coil spacer 113a and the second coil spacer 113b supporting the first separation glass. The first electromagnet coil 112a is formed in the same.

The second transparent elastic film 114b including the second transparent flowable refraction liquid 111b under the first separation glass is combined with the second annular permanent magnet 116b, and the second annular permanent magnet 116b under the first separation glass. The third coil spacer 113c is coupled to make a space for the vertical movement of the upper side.

Similarly, the second separation glass 111b is coupled to the lower side of the third coil spacer 113c, and the second electromagnet coil 112b is formed on one side of the glass.

Under the second separation glass, the third transparent flowable refraction liquid 110c is surrounded by the third transparent elastic film 114c bonded to the third annular permanent magnet 116c, and the first annular permanent magnet 116a and Outside the third ring-shaped permanent magnet 116c, the first protective frame 115a to which the first protective glass 117a is coupled and the second protective frame 115b to which the second protective glass 117b are coupled are coupled.

10 is a cross-sectional view of a fluid lens having an electro-variable focus by interaction of a pair of convex lenses on both sides of a maximum curvature and a permanent magnet composed of a concave lens in the center according to another embodiment of the present invention.

Referring to FIG. 10, the first ring-shaped permanent magnet 116a and the second ring-shaped permanent magnet 116b and the first ring in the initial state in which no current flows in the first electromagnet coil 112a and the second electromagnet coil 112b. The tricyclic permanent magnet 116c is attracted to each other by the magnetic force of each other, the first transparent flowable refraction liquid 110a and the third transparent flowable refraction liquid 110c form a convex lens, and the second transparent flowable refraction liquid 110b forms a concave lens.

By varying the direction and intensity of the current flowing through the electromagnet coil, the light incident from the subject creates lenses with different curvatures due to the fluid deformation of the refraction fluid formed by the motion of the ring-shaped permanent magnets, and continuously produces different focal lengths. Make up a variable lens to make.

In constructing a fluid lens having an electro-variable focus by the interaction of the permanent magnets, a transparent elastic film is used as a material for securing transparency, and a silicone film having good elongation and elasticity {PDMS: Polydimethylsiloxane}, polyurethane {POLY-URETHANE} film and the like can be used, and as the material of the transparent fluid refractor, it is possible to use silicone oil with high transparency {SILICONE OIL} and silicone oil with high fluidity, low density and high refractive index.

It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not restrictive.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100a: first transparent fluid refractive solution
100b: second transparent fluid refractive solution
101: separating glass
102: electromagnet coil
103a: first coil spacer
103b: second coil spacer
104a: first transparent elastic film
104b: second transparent elastic film
105a: first protective frame
105b: second protective frame
106a: first annular permanent magnet
106b: second annular permanent magnet
107a: first protective glass
107b: second protective glass
110a: first transparent fluid refractive solution
110b: second transparent fluid refractive solution
110c: third transparent fluid refractive solution
111a: first separating glass
111b: second separation glass
112a: first electromagnet coil
112b: second electromagnet coil
113a: first coil spacer
113b: second coil spacer
113c: third coil spacer
113d: fourth coil spacer
114a: first transparent elastic film
114b: second transparent elastic film
114c: Third Transparent Elastic Film
115a: first protective frame
115b: second protective frame
116a: first ring permanent magnet
116b: second ring permanent magnet
116c: 3rd ring permanent magnet
117a: first protective glass
117b: second protective glass

Claims

Are formed on both sides,
A pair of annular permanent magnets placed in the same magnetic direction,
A pair of transparent elastic films respectively bonded to the pair of cyclic permanent magnets above,
A transparent fluid refractive solution contained in the pair of transparent elastic films,
And a pair of coil spacers including an electromagnet coil between the flowable refraction fluids to form a convex lens.

Are formed on both sides,
A ring of permanent magnets arranged in a pair of identical magnetic poles,
A pair of transparent elastic films respectively bonded to the pair of cyclic permanent magnets above,
A transparent flowable refraction liquid contained in the outside of the pair of transparent elastic films,
And a pair of coil spacers including an electromagnet coil between the fluid refraction fluids to form a concave lens.

The method of claim 1,
A second transparent elastic film 104b bonded to the second annular permanent magnet 106b,
A second transparent flowable refraction liquid 100b contained in the second transparent elastic film,
A separation glass 101 for separating the first flowable refraction liquid 100a and the second flowable refraction liquid 100b, and
Electromagnet coil 101 is formed on one side of the separation glass,
The first coil spacer 103a and the second coil spacer 103b supporting the first annular permanent magnet 106a and the second annular permanent magnet 106b, respectively, moving in a direction perpendicular to the electromagnet coil. Fluid lens having an electro-variable focus by the interaction of the permanent magnet, characterized in that the convex lens comprises.

The method of claim 2,
A second transparent elastic film 104b bonded to the second annular permanent magnet 106b,
A second transparent fluid refractive solution 100b contained in the second transparent elastic film outside;
A separation glass 101 for separating the first flowable refraction liquid 100a and the second flowable refraction liquid 100b, and
The first coil spacer 103a and the second coil spacer 103b supporting the first annular permanent magnet 106a and the second annular permanent magnet 106b moving in the direction perpendicular to the electromagnet coil 101 are disposed. A fluid lens having an electro-variable focus by the interaction of permanent magnets, characterized in that each comprises a concave lens.

Are formed on both sides,
The first transparent fluid refraction liquid 100a,
The first transparent elastic film 104a containing the fluid refractive index solution,
A first annular permanent magnet 106a bonded to the transparent elastic film outside the first transparent fluid refraction liquid,
A second annular permanent magnet 106b having the same magnetic polarity as the first annular permanent magnet bonded to the other side of the first transparent flowable refraction liquid, and
An electromagnet coil 102 formed between the first and second annular permanent magnets,
In the interaction of the permanent magnets, a convex lens is formed by using a change in the refractive index caused by the fluid deformation of the fluid by the first annular permanent magnet moving in the vertical direction of the coil by the current flowing in the electromagnet coil. Fluid lens with electro-variable focus by.

Are formed on both sides,
The first transparent fluid refraction liquid 100a,
A first annular permanent magnet 106a included outside the first flowable refraction liquid,
A first transparent elastic film 104a including the flowable refraction liquid and the permanent magnet to the outside,
A second annular permanent magnet 106b having the same magnetic direction as the first annular permanent magnet bonded to the other side of the first transparent elastic film, and
An electromagnet coil 102 formed between the first and second annular permanent magnets,
In the interaction of the permanent magnets, a concave lens is formed by using a change in refractive index caused by the fluid deformation of the fluid by the first annular permanent magnet moving in the vertical direction of the coil by the current flowing in the electromagnet coil. Fluid lens with electro-variable focus by.

The first transparent fluid refractive solution 110a,
A first transparent elastic film 114a containing the flowable refractive solution inwards,
A first annular permanent magnet 116a coupled to the transparent elastic film outside of the first transparent fluid refraction liquid,
A first separation glass 111a coupled to the other side of the first transparent flowable refraction liquid,
A first lens unit constituting the convex lens including the first separation glass and the first coil spacer 113a supporting the first transparent film;
The second transparent fluid refractive solution 110b included in the other side of the first separation glass;
A second transparent elastic film 114b comprising a second flowable refraction liquid, and
A second coil spacer 113b in which the fluid refractive solution is formed;
A second annular permanent magnet 116b aligned in the same magnetic direction as the first annular permanent magnet and coupled to the outside of the second elastic film;
A second lens unit constituting a concave lens including a third coil spacer 113c coupled to an outer side of the second elastic film;
A second separation glass 111b coupled to the lower center of the third coil spacer;
A second electromagnet coil 112b provided on one side of the second separation glass;
A fourth coil spacer 113d coupled to the lower side of the second electromagnet coil,
A third transparent flowable refraction liquid 110c included in the fourth spacer and the second separation glass,
The third transparent elastic film 114c which embeds said 3rd fluid refractive solution,
Electro-variable focus by the interaction of the permanent magnet characterized in that it comprises a third lens portion constituting the convex lens including a third annular permanent magnet (116c) coupled to the third transparent elastic film to the outside Having a fluid lens.