TWI385476B - Aperture - Google Patents

Description

aperture

The present invention relates to an optical component, and more particularly to an aperture.

With the development of multimedia technology, digital cameras have been widely used. At the same time, in recent years, the rapid development of portable electronic devices in the direction of high performance and multi-function has made the combination of digital cameras and portable electronic devices become mobile multimedia technologies. development trend. At present, an electronic device having a digital camera function mainly realizes image recording by a lens module incorporated in an electronic device.

One of the indispensable components of the aperture lens module, which can be used to introduce the light source into the shooting lens to provide the light source needed for the lens module to achieve clear shooting.

Please refer to FIG. 1A to FIG. 1C , which are schematic diagrams of a typical aperture 100 in three different states. The aperture 100 is composed of a set of thin curved metal blades 110. By uniformly opening and closing the blades 110, the aperture of the light-passing hole 120 formed by the group of blades 110 can be adjusted to adjust the light entering the shooting lens. So adapt to different shooting needs. However, for the aperture 100, it is generally required to adopt a complicated mechanism including a large number of mechanical components to realize the opening and closing of the blade 110, so that the overall structure of the aperture is complicated, the aperture aperture size is not easily changed, and the lens module is disadvantageous. The miniaturization has led to limitations in the use of lens modules in portable electronic devices.

In view of this, it is necessary to provide an aperture that is simple in structure, compact, and convenient to achieve a change in aperture size.

Hereinafter, a diaphragm which is simple in structure, compact, and convenient to realize a change in the aperture size thereof will be described by way of a specific embodiment.

An aperture comprising a sealed cavity, a transparent conductive aqueous solution and an opaque non-conductive oily solution, a transparent insulating hydrophobic layer, and a first electrode and a second electrode. The sealing cavity includes a first light transmitting portion and a second light transmitting portion disposed opposite to the first light transmitting portion. The transparent conductive aqueous solution and the opaque non-conductive oily solution are mutually immiscible in the sealed cavity and form an interface between the two. The transparent insulating hydrophobic layer is disposed between the opaque non-conductive oily solution and the second light transmitting portion. The first electrode is in electrical contact with the transparent conductive aqueous solution, and the second electrode is disposed on the second transparent portion, and includes a transparent circular electrode and at least one transparent disposed concentrically with the transparent circular electrode The ring electrode can change the shape of the aperture of the aperture by changing the shape of the interface between the transparent conductive aqueous solution and the opaque non-conductive oily solution by energizing the first electrode and the second electrode.

Compared with the prior art, the aperture can realize the aperture aperture size by energizing the first electrode and the second electrode to change the shape of the interface between the transparent conductive aqueous solution and the opaque non-conductive oily solution. Changed, and the aperture structure is simple and compact.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 2, the aperture 200 provided by the embodiment of the present invention includes a sealed cavity 210, a transparent conductive aqueous solution 220, an opaque non-conductive oily solution 230, a transparent insulating hydrophobic layer 240, and a first electrode. 250 and a second electrode 260.

The sealing cavity 210 includes a first light transmitting portion 212, a second light transmitting portion 214 disposed opposite the first light transmitting portion 212, and a first light transmitting portion 212 and a second light transmitting portion. Adjacent side walls 213. The sealing cavity 210 can be a hollow cylinder or a hollow circular table. In the embodiment, the sealing cavity 210 is a hollow cylinder. The first light transmitting portion 212 and the second light transmitting portion 214 are opposite end portions of the hollow cylinder. The material of the first light transmitting portion 212 and the second light transmitting portion 214 may be glass, plastic or the like. The second light transmitting portion 214 includes an inner surface 2142 and an outer surface 2144 opposite to the inner surface 2142. The inner surface 2142 can be a hydrophobic surface.

The transparent conductive aqueous solution 220 and the opaque non-conductive oily solution 230 are mutually immiscible in the sealed cavity 210, and an interface 216 is formed between the two solutions. The conductive aqueous solution 220 may be a saline solution. The non-conductive oily solution 230 can be a black ink. Preferably, the conductive aqueous solution 220 and the non-conductive oily solution 230 have equal or similar densities, so that the aperture 200 can be prevented from being affected by the gravity effect in practical applications.

The transparent insulating hydrophobic layer 240 is disposed between the opaque non-conductive oily solution 230 and the second transparent portion 214 of the sealing cavity 210. Since the hydrophobic layer 240 has a repulsive force to the aqueous solution and has an adsorption force to the oily solution, the transparent conductive aqueous solution 220 is repelled near one side of the first light transmitting portion 212, and the opaque non-conductive oily solution 230 It is adsorbed on the side close to one of the second light transmitting portions 214.

The first electrode 250 is generally disposed on a sidewall of the sealed cavity 210 On the inner surface of 213, electrical contact is made with the transparent conductive aqueous solution 220. The second electrode 260 includes a transparent circular electrode 262 and a transparent ring electrode 264 disposed concentrically with the transparent circular electrode 262. As shown in FIG. 3, the transparent circular electrode 262 and the transparent ring electrode 264 have At a certain interval, it can be filled with a transparent insulating material such as plastic. The second electrode 260 is disposed on the outer surface 2144 of the second transparent portion 214 of the sealing cavity 210. Preferably, the second electrode 260 is disposed concentrically with the sealing cavity 210.

The aperture 200 further includes a voltage source 270. One end of the voltage source 270 is electrically connected to the first electrode 250, and the other end is connected to the transparent circular electrode 262 of the second electrode 260 via a multiplexer 280 and transparent. The ring electrode 264 is electrically connected.

One operation of the aperture 200 will be specifically described below. Please refer to FIG. 2 again, which is a schematic diagram of the first state of the aperture 200 when the voltage source 270 is not applied with a voltage between the first electrode 250 and the second electrode 260. . Since the hydrophobic layer 240 has a repulsive force to the aqueous solution and has an adsorption force to the oily solution, the opaque non-conductive oily solution 230 is substantially uniformly distributed on the surface of the transparent insulating hydrophobic layer 240, and the transparent conductive aqueous solution 220 It is repelled on one side of the first light transmitting portion 212 close to the sealing cavity 210. At this time, the interface 216 between the transparent conductive aqueous solution 220 and the opaque non-conductive oily solution 230 is in the first shape, and almost all of the light (shown by the arrow array in the figure) is blocked by the opaque non-conductive oily solution 230. By passing, the aperture 200 is in an opaque state, that is, the aperture of the aperture 200 is zero.

Please refer to FIG. 4 , which is a schematic diagram of a second state of the aperture 200 when a voltage is applied between the first electrode 250 and the transparent circular electrode 262 of the second electrode 260 to generate an electric field. Since the transparent conductive aqueous solution 220 generates an electrowetting phenomenon under the electric field, which overcomes the repulsive force of the transparent insulating hydrophobic layer 240, the opaque non-conductive oily solution 230 is squeezed out of the transparent circular electrode 262. Contacting the hydrophobic layer 240 to change the shape of the interface 216 between the transparent conductive aqueous solution 220 and the opaque non-conductive oily solution 230, so that the aperture of the aperture 200 becomes larger, and a part of the light can be made. The aperture 200 can be passed without being blocked by the opaque non-conductive oily solution 230.

Please refer to FIG. 5 , which is a schematic diagram of the aperture 200 in a third state when a voltage is applied between the first electrode 250 and the transparent circular electrode 262 of the second electrode 260 and the transparent ring electrode 264 to generate an electric field. . The transparent conductive aqueous solution 220 overcomes the repulsive force of the transparent insulating hydrophobic layer 240 under the action of the electric field, and the opaque non-conductive oily solution 230 is squeezed out of the transparent circular electrode 262 and The region corresponding to the transparent ring electrode 264 is in contact with the hydrophobic layer 240, so that the shape of the interface 216 between the transparent conductive aqueous solution 220 and the opaque non-conductive oily solution 230 is changed again, so that the aperture of the aperture 200 is It becomes larger so that more of the light can be blocked by the opaque non-conductive oily solution 230 and can pass through the aperture 200.

Of course, it can be understood that the second electrode 260 can include more transparent ring electrodes disposed concentrically with the transparent circular electrode 262, so that the aperture size of the aperture 200 can be varied within a larger range.

It should be noted that the second electrode 260 is not limited to be disposed on the outer surface 2144 of the second transparent portion 214 of the sealing cavity 210, as long as it is applied between the first electrode 250 and the second electrode 260. After a certain voltage, it is ensured that the generated electric field can act on the transparent conductive aqueous solution 220 to cause an electrowetting phenomenon, so that the aperture size of the aperture 200 can be changed. For example, as shown in FIG. 6, the second electrode 260 is disposed on the inner surface 2142 of the second light transmitting portion 214 of the sealing cavity 210, and correspondingly, the second electrode 260 may be directly opposite to the second electrode 260. A transparent insulating hydrophobic layer 240 is formed on the other surface contacting the second light transmitting portion 214.

The aperture 200 provided by the embodiment of the present invention generates an electric field acting on the transparent conductive aqueous solution 220 by applying a voltage between the first electrode 250 and the second electrode 260 to cause the transparent conductive aqueous solution 220 to be electrowetting. The phenomenon that the shape of the interface 216 between the transparent conductive aqueous solution 220 and the opaque non-conductive oily solution 230 is changed, that is, the aperture size of the aperture 200 can be changed, and the aperture structure is simple and compact.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims.

200‧‧ ‧ aperture

210‧‧‧ sealed cavity

212‧‧‧First light transmission department

213‧‧‧ side wall

214‧‧‧Second light transmission department

2142‧‧‧ inner surface

2144‧‧‧ outer surface

216‧‧‧ interface

220‧‧‧Transparent conductive aqueous solution

230‧‧‧opaque non-conductive oily solution

240‧‧‧Transparent insulating hydrophobic layer

250‧‧‧first electrode

260‧‧‧second electrode

262‧‧‧Transparent circular electrode

264‧‧‧Transparent ring electrode

270‧‧‧voltage source

280‧‧‧Multiple switch

Figure 1A is a schematic illustration of a typical aperture in a first state.

Figure 1B is a schematic view of the aperture shown in Figure 1A in a second state.

Figure 1C is a schematic view of the aperture shown in Figure 1A in a third state.

2 is a schematic diagram of an aperture provided in an embodiment of the present invention in a first state.

FIG. 3 is a schematic view showing the planar structure of the second electrode in FIG. 2. FIG.

Figure 4 is a schematic view of the aperture shown in Figure 2 in a second state.

Figure 5 is a schematic view of the aperture shown in Figure 2 in a third state.

FIG. 6 is a schematic structural view of an aperture provided by another embodiment of the present invention.

200‧‧ ‧ aperture

210‧‧‧ sealed cavity

212‧‧‧First light transmission department

213‧‧‧ side wall

214‧‧‧Second light transmission department

2142‧‧‧ inner surface

2144‧‧‧ outer surface

216‧‧‧ interface

220‧‧‧Transparent conductive aqueous solution

230‧‧‧opaque non-conductive oily solution

240‧‧‧Transparent insulating hydrophobic layer

250‧‧‧first electrode

260‧‧‧second electrode

262‧‧‧Transparent circular electrode

264‧‧‧Transparent ring electrode

270‧‧‧voltage source

280‧‧‧Multiple switch

Claims (6)

An aperture comprising: a sealing cavity, the sealing cavity comprising a first light transmitting portion, a second light transmitting portion and a side wall disposed opposite to the first light transmitting portion, the sidewall and the first light transmitting The second light transmitting portion is connected to the second light transmitting portion, the second light transmitting portion includes an inner surface and an outer surface disposed opposite the inner surface; a transparent conductive aqueous solution and an opaque non-conductive oily solution, the two solutions Immiscible in the sealed cavity and forming an interface between the two; a transparent insulating hydrophobic layer directly disposed on the inner surface; and a first electrode and a second electrode, the first An electrode is in electrical contact with the transparent conductive aqueous solution, and the second electrode is disposed on the outer surface, and includes a transparent circular electrode and at least one transparent ring electrode concentrically disposed with the transparent circular electrode, the transparent circular shape The electrode and the at least one transparent ring electrode have a certain interval; and the voltage is different between the transparent electrode and the at least one transparent ring electrode by energizing the first electrode and the second electrode, thereby causing the transparent The shape of the interface between the electro-aqueous solution and the opaque non-conductive oily solution changes, and the opaque non-conductive oily solution flows toward the side wall to form a light-passing hole at a central position of the opaque non-conductive oily solution. The transparent conductive aqueous solution flows into the light passing hole to change the pore size of the light passing hole. The aperture of claim 1, wherein the transparent conductive aqueous solution is equal in density to the opaque non-conductive oily solution. The aperture of claim 1 or 2, wherein the transparent conductive aqueous solution is a saline solution, and the opaque non-conductive oily solution is black. Color ink. The aperture of claim 1, wherein the aperture further comprises a voltage source, one end of the voltage source is electrically connected to the first electrode, and the other end is electrically connected to the second electrode via a multiplexer connection. The aperture of claim 1, wherein the sealing cavity is a hollow cylinder or a hollow circular table, and the first light transmitting portion and the second light transmitting portion are opposite ends of the sealing cavity. The second electrode is disposed concentrically with the sealed cavity. The aperture of claim 1, wherein the first light transmitting portion and the second light transmitting portion are made of glass or plastic.