Electrochromic composite film device for lenses

Abstract

The application relates to the field of color-changing lenses, and discloses an electrochromic composite film device for lenses. The electrochromic composite film device comprises a first functional film, a first water-oxygen barrier film, an EC film, a second water-oxygen barrier film and a second functional film in sequence. The electrochromic composite film device can realize the function of a traditional curved resin lens, and the price of electrochromic glasses can be greatly reduced without the expensive curved resin lens.

Description

Technical Field

[0001] This application relates to the field of photochromic lenses, and more specifically, to an electrochromic composite film device for lenses. Background Technology

[0002] Electrochromic light-emitting films (EC films) can be applied to eyeglasses, including AR glasses, smart glasses, and Bluetooth music glasses. When wearing these glasses, users can manually or automatically adjust the lens transmittance to reduce glare in bright light to avoid eye strain; and increase the transmittance in low light for better visibility. This type of eyeglass allows the eyes to remain in a comfortable viewing state at all times.

[0003] These electrochromic lenses typically consist of an electrochromic film attached to a traditional lens using optical adhesive. Traditional lenses are primarily curved or flat optical-grade resin lenses. The lens thickness is generally between 1.0 and 3.0 mm, while the electrochromic film is made as thin as possible, approximately 200 to 500 micrometers, to facilitate the bonding process.

[0004] Optical-grade resin lenses are expensive, and the low yield rate of curved surface bonding further increases manufacturing costs. Photochromic lenses manufactured using traditional structures are costly, with prices reaching hundreds of dollars, hindering product promotion and widespread adoption. The final selling price difference between plano and curved lenses is approximately three times. This is mainly because the curved resin lens itself and the curved surface bonding process account for a significant proportion of the cost.

[0005] Therefore, if the film structure of electrochromic composite film devices for lenses can be optimized, the cost of photochromic lenses may be reduced. Utility Model Content

[0006] To address the issue of high prices for photochromic lenses, this application proposes a solution that eliminates the need for traditional resin lenses. This not only saves on the cost of resin lenses from the material side but also eliminates the aforementioned curved surface bonding process, further reducing processing costs.

[0007] To address the aforementioned technical problems, this application adopts the following technical solution:

[0008] An electrochromic composite film device for lenses comprises, in sequence, a first functional film, a first water and oxygen barrier film, an EC film, a second water and oxygen barrier film, and a second functional film.

[0009] As a preferred implementation, the first functional film and the second functional film are each selected from anti-fingerprint film, anti-scratch film, anti-fog film, anti-reflective film, or composite film with anti-fingerprint and / or anti-scratch and / or anti-fog and / or anti-reflective functions.

[0010] In a preferred embodiment, the first functional membrane and the first water-oxygen barrier membrane, the first water-oxygen barrier membrane and the EC membrane, the EC membrane and the second water-oxygen barrier membrane, and the second water-oxygen barrier membrane and the second functional membrane are all connected by an optical adhesive layer.

[0011] As a preferred implementation, at least two of the first functional membrane, the first water-oxygen barrier membrane, the EC membrane, the second water-oxygen barrier membrane, and the second functional membrane have a thickness greater than 188 μm.

[0012] As a preferred implementation, the total thickness of the electrochromic composite film device is 1.0 to 3.5 mm.

[0013] The design requirements for electrochromic composite film devices mainly include the following aspects:

[0014] a. The thickness must meet the requirements to ensure smooth installation into the structural groove of the frame and match the inner width of the structural groove;

[0015] b. Composite membrane devices must have a certain degree of flexibility and be able to be bent;

[0016] c. Composite membrane devices must possess a certain degree of stiffness and hardness to withstand minor impacts and scratches.

[0017] d. To achieve the waterproof function of the resin lens and prevent the electrochromic film device from being corroded by moisture.

[0018] This application achieves the above requirements by optimizing the above structure and combining it with a thicker film substrate.

[0019] In summary, this application has the following beneficial effects:

[0020] The novel electrochromic composite film device of this application realizes the function of traditional curved resin lenses, eliminating the need for expensive curved resin lenses and significantly reducing the price of electrochromic glasses. Attached Figure Description

[0021] Figure 1 : A schematic diagram of the structure of a composite film device in the prior art;

[0022] Figure 2 : A schematic diagram of the structure of the electrochromic composite film device for lenses in the embodiments of this application;

[0023] Reference numerals: 1. First functional membrane; 2. First water and oxygen barrier membrane; 3. EC membrane; 4. Second water and oxygen barrier membrane; 5. Second functional membrane; 6. Optical adhesive layer. Detailed Implementation

[0024] The technical solutions and effects of this application will be further described in detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the invention, not the entire structure.

[0025] Composite film devices in the prior art, such as Figure 1 As shown, the structure comprises, in sequence, a resin lens, an electrochromic (EC) film device, a water and oxygen barrier film, and an additional functional film, all connected by optical adhesive. The resin lens is an optical-grade resin lens. The EC film device is a semiconductor optoelectronic device, easily corroded by moisture, causing failure. Therefore, along with the EC film device, the water and oxygen barrier film and the additional functional film are also attached to the resin lens. The water and oxygen barrier film prevents moisture from penetrating the EC film device. On the other side of the water and oxygen barrier film, the additional functional film is attached. This additional functional film can have a single effect or a combination of effects, such as anti-fingerprint, anti-scratch, anti-reflective, and anti-fog properties. (These types of films are commercially available products). Because the EC film device, water and oxygen barrier film, and additional functional film are all thin films, they are bonded together using optical adhesive through a planar lamination process to form a composite film. Then, the composite film is bonded to the resin lens using a curved lamination process and optical adhesive. It should be noted that a water and oxygen barrier membrane is generally not needed between the resin lens and the EC membrane, as the resin lens itself is thick and dense, providing a water vapor barrier effect. However, in the aforementioned prior art, the high cost of optical-grade resin lenses and the low yield rate of curved surface bonding further increase manufacturing costs, hindering product promotion and widespread adoption. Therefore, this application proposes the following implementation scheme:

[0026] This embodiment discloses an electrochromic composite film device for lenses, such as... Figure 2 As shown, it includes, in sequence, a first functional membrane 1, a first water and oxygen barrier membrane 2, an EC membrane 3, a second water and oxygen barrier membrane 4, and a second functional membrane 5.

[0027] The first functional film 1 and the second functional film 5 are each selected from anti-fingerprint film, anti-scratch film, anti-fog film, anti-reflective film, or composite film with anti-fingerprint and / or anti-scratch and / or anti-fog and / or anti-reflective functions. The anti-fingerprint film, anti-scratch film, anti-fog film, anti-reflective film, or composite film with the above functions are all existing technologies and can be obtained commercially.

[0028] In one feasible implementation, the first functional film 1 and the second functional film 5 are both selected from anti-fingerprint film, anti-scratch film, anti-fog film, or anti-reflection film.

[0029] In one feasible implementation, the first functional film 1 and the second functional film 5 are selected from any two of the following: anti-fingerprint film, anti-scratch film, anti-fog film, and anti-reflection film, and combined together.

[0030] In one feasible implementation, the first functional film 1 and the second functional film 5 are both selected from composite films with anti-fingerprint and / or anti-scratch and / or anti-fog and / or anti-reflection functions.

[0031] Reference Figure 2 The first functional membrane 1 and the first water and oxygen barrier membrane 2 are bonded together with optical adhesive, and the optical adhesive is cured between the two membrane layers to form an optical adhesive layer 6. Similarly, the first water and oxygen barrier membrane 2 and the EC membrane 3, the EC membrane 3 and the second water and oxygen barrier membrane 4, and the second water and oxygen barrier membrane 4 and the second functional membrane 5 are also bonded together with optical adhesive to form an optical adhesive layer 6.

[0032] In the first functional membrane 1, the first water and oxygen barrier membrane 2, the EC membrane 3, the second water and oxygen barrier membrane 4, and the second functional membrane 5, at least two membranes use a substrate with a thickness of 188 micrometers or even greater, meaning at least two membranes have a thickness greater than 188 μm. The final composite membrane device has a total thickness between 1.0 and 3.5 mm. This thickness of the composite membrane device meets the requirements, allowing it to be smoothly installed into the structural groove of the lens frame. It also possesses a certain degree of flexibility, allowing it to be bent, while maintaining a certain degree of stiffness and surface hardness to withstand minor impacts and scratches.

[0033] Because the structure in this embodiment is a thin-film composite structure, all optical adhesive bonding is planar bonding. The cost difference between planar bonding and curved surface bonding (bonding curved resin lenses) is significant. This solution can effectively reduce bonding costs. Due to its flexibility, this composite film device can also be bent into a curved surface for assembly.

[0034] The beneficial effect of this application is that the electrochromic composite film device itself realizes the function of traditional curved resin lenses, eliminating the need for expensive curved resin lenses and significantly reducing the price of electrochromic glasses.

[0035] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An electrochromic composite film device for lenses, characterized in that, It includes, in sequence, a first functional membrane, a first water and oxygen barrier membrane, an EC membrane, a second water and oxygen barrier membrane, and a second functional membrane; The total thickness of the electrochromic composite film device is 1.0~3.5mm.

2. The electrochromic composite film device for lenses according to claim 1, characterized in that, The first functional film and the second functional film are each selected from anti-fingerprint film, anti-scratch film, anti-fog film, anti-reflective film, or composite film with anti-fingerprint and / or anti-scratch and / or anti-fog and / or anti-reflective functions.

3. The electrochromic composite film device for lenses according to claim 1, characterized in that, The first functional membrane and the first water-oxygen barrier membrane, the first water-oxygen barrier membrane and the EC membrane, the EC membrane and the second water-oxygen barrier membrane, and the second water-oxygen barrier membrane and the second functional membrane are all connected by optical adhesive layers.

4. The electrochromic composite film device for lenses according to claim 1, characterized in that, At least two of the first functional membrane, the first water-oxygen barrier membrane, the EC membrane, the second water-oxygen barrier membrane, and the second functional membrane have a thickness greater than 188 μm.

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