CN212965677U - Defogging device and glasses - Google Patents

Abstract

The utility model provides a defogging device, this defogging device include transparent conducting film and power module, and transparent conducting film sets up on the surface of at least one side of lens, and transparent conducting film includes the metal net, and power module is connected with transparent conducting film electricity. The metal grid has strong heat conduction capability, and the heat conduction efficiency by the metal grid is high, so that the heat distribution is uniform, the lens is favorable for rapidly heating and the damage to the lens caused by uneven heating is avoided.

Description

Defogging device and glasses

Technical Field

At least one embodiment of the present disclosure relates to the field of glasses, in particular to a defogging device and glasses.

Background

In daily life, the glasses become an indispensable necessity for daily life of part of people, correspondingly, in daily life, people can change the glasses in different environments with the glasses, and the local temperature change of the glasses can be caused by the respiration of people. Water vapor in the air can form water after condensation on cooling, which can seriously interfere with the visual effects if condensed on the glasses.

Disclosure of Invention

The utility model provides a defogging device, this defogging device is applied to glasses and includes transparent conducting film and power module, and transparent conducting film sets up on the surface of at least one side of the lens of glasses, and transparent conducting film includes the metal net, and power module is connected with transparent conducting film electricity.

Utilize power module to the metal mesh circular telegram back, the metal mesh can generate heat, and metal mesh's heat conductivility is strong, and the heat-conduction that utilizes the metal mesh to go on is efficient and make heat distribution even, is favorable to the lens rapid heating up and avoids the lens to cause the damage because of being heated the inequality.

For example, in one embodiment of the first aspect of the present disclosure, a defogging device is provided in which a metal mesh is composed of an opaque metal material.

The metal material (such as simple metal or alloy) with strong electric and heat conduction capability is usually opaque, and the transparent conductive film can be made transparent in visual effect by using the metal mesh design in the foregoing embodiment, so that the solution of disposing the metal mesh in the glasses does not adversely affect the visual capability of the glasses.

For example, in a defogging device provided by an embodiment of the first aspect of the present disclosure, the metal material includes silver, copper, aluminum, molybdenum, titanium, and nickel.

The metal grid formed by the metal material has high heat conduction capability, and is beneficial to quickly heating the lens.

For example, in the defogging device provided in an embodiment of the first aspect of the present disclosure, the thickness of the metal mesh may be 50 to 500 micrometers, the line width of the mesh may be 1 to 10 micrometers, and the equivalent aperture of the mesh may be 50 to 500 micrometers.

The metal mesh with the parameters can ensure good heating and heat conducting capacities and cannot cause adverse effects on the visual capacity of the lenses (glasses) on the visual effect distinguishable by human eyes.

For example, in a defogging device provided in an embodiment of the first aspect of the present disclosure, the metal mesh is divided into a plurality of sub-meshes which are arranged side by side and spaced apart from each other.

In the embodiment, because the sub-grids are spaced from each other, when the metal grid is electrified, the current introduced into any sub-grid cannot be introduced into other sub-grids, and compared with the grid structure integrated on the whole surface, the grid structure is beneficial to uniform distribution of the current intensity in the metal grid, and is further beneficial to uniform heating.

For example, an embodiment of the first aspect of the present disclosure provides a defogging device further including a power source, a switch electrically connected between the power source and the transparent conductive film, and a control chip in signal connection with the power source and the switch.

For example, an embodiment of the first aspect of the present disclosure provides a defogging device further including a lens frame and a lens leg, wherein the lens frame is used for fixing a lens, the lens leg is connected with the lens frame, and the power supply, the switch and the control chip are respectively fixed on one of the lens frame and the lens leg.

For example, in a defogging device provided by an embodiment of the first aspect of the present disclosure, the transparent conductive film further includes a transparent conductive layer and an electrochromic layer. The transparent conducting layer is overlapped with the metal grid, and the electrochromic layer is arranged between the transparent conducting layer and the metal grid.

The transparent conductive layer and the metal mesh are configured to apply a voltage to the electrochromic layer to switch the electrochromic layer between a colorless state and a colored state, and with the electrochromic layer, the defogging device may be made to have a colorless/colored switching function. For example, in the case of high ambient light brightness (e.g., strong sunlight), the transparent conductive layer and the metal mesh may be powered on to apply a voltage to the electrochromic layer, so as to change the color of the electrochromic layer, thereby blocking a certain amount or specific color of light (filtering), thereby achieving a sunglass-like effect, and as the voltage is increased, the color of the electrochromic layer may be deepened, thereby enhancing the filtering effect, i.e., the defogging device has the capability of adjusting the filtering; for example, in the case of low ambient brightness (e.g., sunlight intensity within an acceptable range for the human eye), the application of voltage to the electrochromic layer may be stopped, the electrochromic layer becomes a colorless transparent state, and the defogging device becomes a normal state in which light is completely transmitted.

For example, in a defogging device provided in an embodiment of the first aspect of the present disclosure, a positive electrode of a power source is selectively connected to one end of a metal mesh or a transparent conductive layer through a switch, and a negative electrode of the power source is connected to the other end of the metal mesh.

For example, in a defogging device provided by an embodiment of the first aspect of the present disclosure, when the switch is connected to the transparent conductive layer, the transparent conductive layer and the metal mesh are configured to apply a voltage to the electrochromic layer to cause the electrochromic layer to switch into the colored state; when the changeover switch is connected to one end of the metal mesh, the electrochromic layer is switched to a colorless state and the power supply applies a voltage to the metal mesh to cause it to generate heat.

In the embodiment, the anode of the power supply is electrically connected with the transparent conducting layer by switching the switch, and the metal grid and the transparent conducting layer are respectively electrically connected with the anode and the cathode of the power supply, so that the electrochromic layer changes color, and thus, the glasses have color change capability; make the positive pole and the metal grid electricity of power be connected through change over switch, thereby metal grid is connected with the anodal and the negative pole electricity of power simultaneously and is formed the route and generate heat, so, can the intensification lens in order to have the defogging function. Through above-mentioned design, can also can possess the ability of discolouing when can be so that the defogging device possesses the defogging function.

For example, an embodiment of the first aspect of the present disclosure provides that the defogging device further includes a temperature sensor, and the temperature sensor is in signal connection with the control chip. The control chip is provided with a preset value, and when the falling amplitude of the environmental temperature detected by the temperature sensor within the preset time is larger than the preset value, the control chip starts the change-over switch to enable the power supply to supply power to the metal grid.

In practical applications, the lens fogging is actually caused by a temperature difference in a short time, and a time difference and a temperature difference that can cause fogging are set accordingly as the preset time and the preset value in this embodiment. So, utilize temperature sensor real-time supervision's ambient temperature, control chip can detect the temperature variation range of the environment that glasses are located in the default time, if this range is greater than the default, control chip opens change over switch so that metal mesh can generate heat. Therefore, the defogging device can have an automatic defogging function, and manual operation of a user can be liberated. For example, the temperature variation range is low temperature to high temperature variation.

A second aspect of the present disclosure provides eyewear comprising a frame, lenses, and the defogging device of the first aspect. Transparent conductive film among the defogging device sets up on the surface of at least one side of lens, and the power module among the defogging device sets up on the mirror holder.

For example, in one embodiment of the second aspect of the present disclosure, the frame includes a frame for fixing the lenses and a temple connected to the frame, and the power module is disposed on at least one of the frame and the temple.

Drawings

FIG. 1 is an exploded view of defogging eyeglasses according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the area Q of the defogging device shown in FIG. 1 taken along line M-N;

fig. 3A is a schematic plan view of a metal grid in the transparent conductive film 200 shown in fig. 2;

fig. 3B is a schematic plan view of another metal grid in the transparent conductive film 200 shown in fig. 2;

fig. 4 is a circuit diagram of a partial structure of a defogging device according to an embodiment of the present disclosure;

fig. 5 is a circuit diagram of a partial structure of a defogging device according to an embodiment of the present disclosure; and

fig. 6 is a schematic view of defogging glasses according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The conductive film can be attached to the lenses of the glasses, and the conductive film heats up after being electrified so as to heat the lenses and evaporate water mist on the lenses. For example, the conductive film may be formed of a transparent conductive material, thereby securing a visual effect of the lens. However, the transparent conductive material has poor thermal conductivity and cannot rapidly heat up the lens, so that the requirement for high performance of the defogging device cannot be satisfied.

At least one embodiment of the present disclosure provides a defogging device applied to glasses. The defogging device comprises a lens and a transparent conductive film, wherein the transparent conductive film is arranged on the surface of at least one side of the lens, and the transparent conductive film comprises a metal grid. Utilize power module to the metal mesh circular telegram back, the metal mesh can generate heat, and metal mesh's heat conductivility is strong, and the heat-conduction efficient that utilizes the metal mesh to go on moreover just makes heat distribution even, is favorable to the lens rapid heating up and avoids the lens to cause the damage because of being heated the inequality.

The following describes a concrete structure of the defogging device and the glasses according to at least one embodiment of the present disclosure with reference to the drawings.

As shown in fig. 1, 2 and 3A, the glasses provided by at least one embodiment of the present disclosure include a lens 100 and a defogging device, the defogging device includes a transparent conductive film 200 and a power module (see a power supply, a switch, a control chip, etc. in the following embodiments), the transparent conductive film 200 is disposed on a surface of at least one side of the lens 100, and the transparent conductive film 200 includes a metal mesh 210.

It should be noted that, in the embodiments of the present disclosure, the type of the lens and the number, the position distribution and the manner of disposing the transparent conductive film on the lens are not limited. For example, the lenses may be near vision, distance vision, or other types of lenses. For example, the transparent conductive film may be disposed on the same side of the lens (e.g., the side of the lens facing toward or away from the eye), or on both sides of the lens. For example, the transparent conductive film can be directly prepared on the lens by a deposition process (such as organic chemical vapor deposition, etc.), so that the transparent conductive film and the lens can be prevented from falling off, and the design is light and thin; or, can laminate transparent conductive film on the lens through the glue film, so, the simple operation.

For example, in a defogging device provided in at least one embodiment of the present disclosure, the metal mesh is composed of an opaque metal material. The metal material (such as simple metal or alloy) with strong electric and heat conduction capability is usually opaque, and the transparent conductive film can be made transparent in visual effect by using the metal mesh design in the foregoing embodiment, so that the solution of disposing the metal mesh in the glasses does not adversely affect the visual capability of the glasses.

For example, in a defogging device provided in at least one embodiment of the present disclosure, the metal material includes silver, copper, aluminum, molybdenum, titanium, nickel, and the like. The metal grid formed by the metal material has high heat conduction capability, and is beneficial to quickly heating the lens.

For example, in the defogging device provided in at least one embodiment of the present disclosure, the thickness of the metal mesh may be 50 to 500 micrometers, the line width of the mesh is 1 to 10 micrometers, further 1 to 5 micrometers, and the equivalent aperture of the mesh is 50 to 500 micrometers, further 100 to 500 micrometers. For example, the grid line width is further 2, 3, 4, 6, 8 microns, etc., for example, the line width may be 4-10 microns or 2-3 microns. The metal mesh with the parameters can ensure good heating and heat conducting capacities and cannot cause adverse effects on the visual capacity of the lenses (glasses) on the visual effect distinguishable by human eyes.

In the embodiment of the present disclosure, the shape of the mesh of the metal mesh is not limited, and may be designed according to the requirements of the actual process. For example, the shape of the mesh may be a rectangle (e.g., square) as shown in fig. 3A, or may be a regular pattern or an irregular pattern such as a triangle, a polygon, a circle, or the like.

It should be noted that, in the embodiment of the present disclosure, the planar shape of the metal mesh is not limited, and may be designed as needed.

For example, in some embodiments of the present disclosure, the metal mesh may be a one-piece mesh, the structure being shown in fig. 3A.

In the metal mesh, each metal wire for defining the mesh can be regarded as a resistor, so that in the structure shown in fig. 3A, when a voltage is applied across the metal mesh, a current can be communicated across the metal mesh via several paths, but the number of resistors (which can also be regarded as the path length) in different paths may be unequal, so that when power is applied, the power (heat generation efficiency) of different regions of the metal mesh is different, and the problem of uneven heat generation still exists to some extent.

For example, in other embodiments of the present disclosure, the metal mesh may be divided into a plurality of sub-meshes that are side-by-side and spaced apart from each other. Because the sub-grids are spaced from each other, when the metal grid is electrified, the current introduced into any sub-grid cannot be introduced into other sub-grids, and compared with the grid structure integrated with the whole surface, the grid structure is beneficial to uniform distribution of the current intensity in the metal grid, thereby being beneficial to uniform heating. Illustratively, as shown in FIG. 3B, the metal grid includes a first subgrid 2101, a second subgrid 2102, and a third subgrid 2103 arranged in parallel, the first subgrid 2101, the second subgrid 2102, and the third subgrid 2103 being spaced apart from one another. Thus, compared with fig. 3A, the difference of the number of resistances (path lengths) in different current paths is reduced, thereby facilitating uniform heating of the metal mesh.

For example, in the manufacturing process of the metal mesh shown in fig. 3B, the metal mesh shown in fig. 3A may be prepared first, and then the metal wires of the metal mesh are disconnected along the boundary between adjacent sub-meshes along the area where the predetermined sub-meshes are located, so as to ensure the uniformity of the distribution of the metal wires of the entire metal mesh, which is beneficial to the uniformity of light emission.

For example, the defogging device provided by at least one embodiment of the present disclosure further includes a power supply, a switch electrically connected between the power supply and the transparent conductive film, and a control chip in signal connection with the power supply and the switch. Illustratively, as shown in fig. 4, the switch 400 controls the power supply 300 to the transparent conductive film layer (the metal mesh 210 is shown therein), and the control chip 500 controls the switching function of the switch 400. In this way, the control chip 500 can select whether power needs to be supplied to the metal mesh 210 to achieve heat generation.

For example, the control chip may be a central processing unit, a digital signal processor, a single chip, a programmable logic controller, or the like. For example, the control chip may further include a memory, a power module, and the like, and implement power supply and signal input and output functions through additionally provided wires, signal lines, and the like. For example, the control chip may also include hardware circuitry, computer executable code, and the like. The hardware circuits may include conventional Very Large Scale Integration (VLSI) circuits or gate arrays and off-the-shelf semiconductors such as logic chips, transistors, or other discrete components; the hardware circuitry may also include field programmable gate arrays, programmable array logic, programmable logic devices, or the like.

The embodiment of the disclosure also provides glasses, which comprise the defogging device in any one of the embodiments. For example, at least one embodiment of the present disclosure provides that the glasses further comprise a frame, and the power module in the defogging device is disposed on the frame. For example, the frame includes a frame for fixing lenses and a temple connected to the frame, and the power supply module (e.g., a power supply, a switch, a control chip, etc.) is fixed to at least one of the frame and the temple. Illustratively, as shown in fig. 6 and 4, the frame 10 is used to fix the lenses 100, and the temples 20 are connected (e.g., detachably connected) to the frame 10. The power module of the defogging device is arranged on the glasses frame, and the power source 300 can be arranged in the glasses legs 20, so that the power source 300 is prevented from being exposed outside and the appearance of the whole defogging device is prevented from being damaged. For example, further, the power supply 300 and the control chip 500 may be disposed at an end of the temple 20 far from the frame 10. For example, further, wires for connecting the transparent conductive film, the power supply, the switch and the control chip may be provided inside the glasses frame and the glasses legs, so that the above design does not affect the appearance of the whole defogging device. For example, the wires may be covered with an insulating sheath, such as plastic, silicone, or the like.

For example, in other embodiments of the present disclosure, the wires, the power source, the switch and the control chip may be designed as an integrated structure, which is covered by an insulating outer cover, and the integrated structure may be attached to or coated on the temple of the glasses, so as to be electrically connected to the transparent conductive film on the lens.

For example, the frame may include a top cover support, a nose pad, and the like. The upper cover bracket may be made of an aluminum alloy, may be formed by sand blasting, surface drawing, or the like, and may be provided with a silver appearance. The material of the nose pad includes silicone, which may be formed by a process such as heat pressing, and may be configured to have a gray-white appearance. For example, a style of defogging glasses including a cover bracket 101 and a nose pad 102 is shown in fig. 6.

For example, the material of the lens may be a material having high light transmittance such as glass or resin.

For example, the equivalent diameter of the middle portion of the temple is smaller than the equivalent diameter of the end portions, thereby presenting a more reduced appearance effect. For example, the equivalent diameter of the temple middle portion may be set within 5mm, such as 1.5mm, 2.5mm, 3.5mm, 4.5mm, etc.; the one end of keeping away from the picture frame of mirror leg can be used for holding the power, and its equivalent diameter can set up to more than 5mm correspondingly, and when the user wore, this part was hidden behind the ear, not only can guarantee that glasses have more pleasing to the eye visual effect, can also increase the one end weight that the picture frame was kept away from to the mirror leg, glasses landing when preventing to wear.

For example, in the embodiments of the present disclosure, the edge portion of the frame (e.g., the portion where the frame is connected to the temple) is provided with a chamfer, which reduces the risk of scratching and the like of the frame due to sharpness, and has a better visual effect.

For example, in a defogging device provided by at least one embodiment of the present disclosure, the transparent conductive film further includes a transparent conductive layer and an electrochromic layer. The transparent conducting layer is overlapped with the metal grid, and the electrochromic layer is arranged between the transparent conducting layer and the metal grid. A voltage may be applied to the electrochromic layer through the transparent conductive layer and the metal mesh to switch the electrochromic layer between a colorless state and a colored state. Illustratively, as shown in fig. 5, the transparent conductive film includes a metal mesh 210, a transparent conductive layer 220, and an electrochromic layer 230, and the electrochromic layer 230 is disposed between the metal mesh 210 and the transparent conductive layer 220.

As such, with the electrochromic layer 230, the defogging device may be made to have a colorless/colored switching function. For example, in the case of high brightness of ambient light (e.g., strong sunlight), the transparent conductive layer 220 and the metal mesh 230 may be used to apply a voltage to the electrochromic layer 230, so that the electrochromic layer 230 changes color (e.g., changes to red, black, yellow, etc.), thereby blocking a certain amount or specific color of light (filtering), which acts like a black mirror, and as the voltage increases, the color of the electrochromic layer 230 may be deepened, thereby enhancing the filtering effect, i.e., the defogging device has the ability to adjust the filtering; for example, in the case of low ambient brightness (e.g., sunlight intensity within an acceptable range for human eyes), the application of voltage to the electrochromic layer 230 may be stopped, the electrochromic layer 230 becomes a colorless transparent state, and the defogging device becomes a normal state in which light is completely transmitted.

According to the above description, while the defogging device is designed to have the color changing and defogging functions, the structures for realizing the two functions are integrated, that is, the metal mesh for defogging is simultaneously used as one electrode for electrochromic, so that the structure of the whole transparent conductive film is simplified, the light and thin design of the transparent conductive film is facilitated, and the cost is reduced.

For example, the material of the transparent conductive layer may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Gallium Oxide (IGO), Gallium Zinc Oxide (GZO), zinc oxide (ZnO), indium oxide (In2O3), Aluminum Zinc Oxide (AZO), carbon nanotubes, or the like.

For example, the material of the electrochromic layer may be a solid material. For example, the solid material may be an inorganic material or an organic material. The inorganic material may include transition metal oxides and derivatives thereof, such as tungsten oxide (WO)₃) Molybdenum oxide (MoO3), nickel oxide (NiO), iridium oxide (IrOx), and the like; the organic material may include a redox type compound, a metal chelate, a conductive polymer, and the like, such as viologen, phthalocyanine, polyaniline, and the like.

For example, in embodiments of the present disclosure, when a transparent conductive film is disposed on a lens, a metal mesh is disposed between an electrochromic layer and the lens, or a transparent conductive layer is disposed between an electrochromic layer and the lens.

For example, in the defogging device provided by at least one embodiment of the present disclosure, the positive electrode of the power supply is selectively connected to one end of the metal mesh or the transparent conductive layer through the switch, and the negative electrode of the power supply is connected to the other end of the metal mesh. For example, one end of the metal mesh connected to the positive electrode of the power supply through the change-over switch is a first end, and one end connected to the negative electrode of the power supply is a second end; the transparent conducting layer is connected to the anode of the power supply through the switch, and one end of the transparent conducting layer is a third end. Illustratively, as shown in fig. 5, the first end 211 of the metal mesh 210 is connected to the positive pole 310 of the power supply 300 through the switch 400, and the second end 212 of the metal mesh 210 is connected to the negative pole 320 of the power supply 300; the third terminal 221 of the transparent conductive layer 220 is connected to the anode 310 of the power supply 300 through the switch 400. In this way, by controlling the switch 400, the power can be selectively supplied to the metal mesh 210 or the transparent conductive layer 220, so as to control the defogging device to be in a defogging or filtering state.

The transparent conductive layer and the metal mesh are configured to apply a voltage to the electrochromic layer to cause the electrochromic layer to switch to a colored state when the diverter switch is connected to the transparent conductive layer; when the changeover switch is connected to one end of the metal mesh, the electrochromic layer is switched to a colorless state and the power supply applies a voltage to the metal mesh to cause it to generate heat. Next, in a specific example, the operation principle of the defogging device shown in fig. 5 will be described.

Illustratively, as shown in fig. 5, the switch 400 may be controlled by the control chip 500 to electrically connect the anode 310 of the power supply 300 with the third terminal 221 of the transparent conductive layer 220. The metal mesh 210 and the transparent conductive layer 220 are electrically connected with the anode 310 and the cathode 320 of the power supply 300, respectively, and an electric field is formed between the metal mesh 210 and the transparent conductive layer 220 due to the potential difference, so that the electrochromic layer 230 changes color, and thus, the glasses have color change capability. For example, the positive electrode 310 of the power supply 300 may be electrically connected to the first terminal 211 using the switch 400. In this way, the metal mesh 210 is electrically connected to the positive electrode 310 and the negative electrode 320 of the power supply 300 at the same time to form a path for generating heat, so that the lens can be heated to have a defogging function. Through above-mentioned design, can also can possess the ability of discolouing when can be so that the defogging device possesses the defogging function.

For example, the defogging device provided by at least one embodiment of the present disclosure further includes a temperature sensor, and the temperature sensor is in signal connection with the control chip. The control chip is provided with a preset value, and when the falling amplitude of the environmental temperature detected by the temperature sensor within the preset time is larger than the preset value, the control chip starts the change-over switch to enable the power supply to supply power to the metal grid. Illustratively, as shown in fig. 5, the temperature sensor 600 is in signal connection with the control chip 500. In practical applications, the lens fogging is actually caused by a temperature difference in a short time, and a time difference and a temperature difference that can cause fogging are set accordingly as the preset time and the preset value in this embodiment. So, utilize temperature sensor real-time supervision's ambient temperature, control chip can detect the temperature variation range of the environment that glasses are located in the default time, if this range is greater than the default, control chip opens change over switch so that metal mesh can generate heat. Therefore, the defogging device can have an automatic defogging function, and manual operation of a user can be liberated. For example, the temperature variation range is low temperature to high temperature variation.

For example, the preset time in the above embodiment may be 1 to 5 seconds, and further 2, 3, 4 seconds, and the like.

For example, the preset value in the above embodiment may be not less than 2 degrees celsius, such as further 4, 6, 8, or 10 degrees celsius, and the like.

In the embodiment of the present disclosure, an operation key may be provided on the defogging device to manually control the switch and the like. For example, the defogging device may be provided with a jack 30 or the like as shown in fig. 1 and 6 for charging and discharging a power source or for connecting other devices.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A defogging device, applied to eyeglasses, comprising:

a transparent conductive film disposed on a surface of at least one side of a lens of the glasses;

a power module electrically connected to the transparent conductive film;

wherein the transparent conductive film comprises a metal mesh.

2. The defogging device recited in claim 1,

the metal grid comprises meshes and metal wires for defining the meshes, and the metal wires are made of opaque metal materials.

3. The defogging device recited in claim 1,

the metal grid is divided into a plurality of sub-grids which are arranged side by side and are spaced from each other.

4. A defogging device as recited in any one of claims 1-3 wherein said power module comprises:

a power source;

a switch electrically connected between the power supply and the transparent conductive film;

and the control chip is in signal connection with the power supply and the change-over switch.

5. The defogging device as recited in claim 4, wherein said transparent conductive film further comprises:

a transparent conductive layer;

an electrochromic layer disposed between the transparent conductive layer and the metal mesh.

6. Defogging device according to claim 5,

the positive pole of the power supply is selectively connected to one end of the metal grid or the transparent conducting layer through the change-over switch, and the negative pole of the power supply is connected to the other end of the metal grid.

7. The defogging device recited in claim 6,

when the diverter switch is connected to the transparent conductive layer, the transparent conductive layer and the metal mesh are configured to apply a voltage to the electrochromic layer to cause the electrochromic layer to switch to a colored state;

when the changeover switch is connected to one end of the metal mesh, the electrochromic layer is switched to a colorless state and the power supply applies a voltage to the metal mesh to cause it to generate heat.

8. The defogging device recited in claim 4 further comprising:

the temperature sensor is in signal connection with the control chip;

the control chip is provided with a preset value, and when the falling amplitude of the ambient temperature detected by the temperature sensor in preset time is larger than the preset value, the control chip starts the change-over switch to enable the power supply to supply power to the metal grid.

9. An eyeglass comprising a frame, a lens and a defogging device according to any one of claims 1 to 8;

wherein, the transparent conductive film in the defogging device is arranged on the surface of at least one side of the lens;

and a power module in the defogging device is arranged on the mirror bracket.

10. An eyeglass as in claim 9, wherein the frame comprises:

a frame for fixing the lens;

the glasses legs are connected with the glasses frame;

wherein the power module is disposed on at least one of the frame and the temple.

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