TWI507712B - The structure of an electrochromic vehicle rear view mirror body and its manufacturing method - Google Patents

Description

Electrochromic automobile rearview mirror body structure and manufacturing method thereof

The invention relates to an electrochromic automobile rearview mirror body structure, in particular to a technical scope of a rearview mirror body developed by using an electrochromic solution.

According to the development of electronic technology, the rear view mirrors of the car no longer have only the rear view function. The rear view mirror has been improved from the earliest mirror body without any anti-glare function to the anti-glare mirror which can be manually adjusted. Evolution to an electrochromic mirror that automatically adjusts the reflectivity by photosensors. However, since the development of technology, many rearview mirrors can be added to electronic compasses or reversing images... and so on. These new features are often accompanied by displays to alert driving directions or driving safety.

Conventional electrochromic mirror technology US 5128799, as shown in Fig. 6, this structure requires a silver layer (93) on the back side of the second substrate (92) for reflective use, however the silver layer (93) It is easy to produce oxidation after contact with air, so it is necessary to apply a protective lacquer (94) to achieve effective protection. The protective lacquer (94) is not generally transparent, making this electrochromic (91) The structure of the glass mirror (9) can only be used as an electronic automatic anti-glare application, and a display cannot be attached to the back of the mirror body (9).

The later developed technology applies the silver layer (93) to the back surface of the second substrate (92) by vacuum coating, such as US5818625. Please refer to Fig. 7, since the vacuum coating can adjust the thickness of the coating layer. Therefore, the silver layer (93) can be controlled to have both high transmittance and good electrical conductivity. Performance, while not losing the function of the mirror, so you can place a TFT LCD or LCD display (95) on the back of the glass frame (9) structure to display the information needed to drive to improve driving safety. However, since the silver layer (93) needs to be in direct contact with the electrochromic (91) material layer, if the electrochromic (91) material layer contains water or air, the silver layer (93) is directly affected. A slight effect will only produce punctate or blocky white or brown silver oxide, which may cause large areas of oxidation or even release.

Therefore, the US8282224 structure is developed. As shown in FIG. 8, the structure is similar to that of US5128799, but a polarizing and reflecting substrate (96) is attached to the back surface of the second substrate (92) instead of the silver layer (93). Since the polarizing and reflecting substrate (96) also has penetration and reflection effects, the same effect as US5818625 can also be achieved. However, the optical effect reflected by the polarizing and reflecting substrate (96) is yellowish, and at the same time, it is a plastic substrate, which is likely to cause scratches during the manufacturing process, and at the same time, if it is in a high temperature state for a long time, the polarizing and reflection are caused. The substrate (96) is at risk of deformation. Therefore, a multilayer film-coated glass (97) with optical compensation is added to the polarizing and reflecting substrate (96) to protect and adjust the entire mirror body (9). Color temperature.

In view of the fact that the above-mentioned US5128799 technology cannot meet the requirements of the current automotive industry for the driving assistance system, and the US5818625 technology may cause the mirror failure of the mirror body (9), the structure mentioned in the latest technology US8282224 can make up for the past. The lack of technology, however, the material having a polarizing and reflecting substrate (96) used in the US8282224 is relatively expensive, and another high-cost multilayer coated glass (97) is required as a support and compensation for its optical The shortcomings of the lens body (9) are costly because of the need for multiple substrates to be bonded and the production is difficult and the cost is greatly increased.

The primary object of the present invention is therefore to produce a low cost electrochromic automotive rearview mirror body structure for use in current automotive rearview mirrors or automotive windshields.

Therefore, the technical means used in the structure of the electrochromic automobile rearview mirror body comprises: a first substrate, which is made of conductive glass; and a second substrate, which is also made of conductive glass and is connected by an adhesive. Provided on the first substrate to form a sealed space; an electrochromic solution is disposed in the sealed space; a third substrate is disposed on the second substrate by an optical adhesive side.

The first base material and the second base material have a light transmittance of at least 75% or more and a surface resistance of 15 ohms.

The above adhesive is a mixture of an epoxy resin and a glass ball.

The third substrate is a multilayer film glass body or a glass body having high reflectance such as silver, aluminum, aluminum titanium alloy or aluminum alloy.

The optical glue is set to Liquid Optical Clear Adhesive (LOCA) or Optically Clear Adhesive (OCA).

The method for manufacturing an electrochromic automobile rearview mirror body structure comprises: (A) a step of forming an electrochromic element, comprising a first substrate, a second substrate, an adhesive, and a The electrochromic solution constitutes the electrochromic element; (B) a smear step is applied to a third substrate by a liquid optical glue; (C) a bonding step is applied to the third substrate Surface-attached to the back surface of the electrochromic element, and pressurized to spread the optical glue between the second substrate and the third substrate, and wipe off the overflowed optical glue; and (D) a curing step, The electrochromic element and the third substrate are irradiated with ultraviolet rays to cure the optical glue; wherein the optical glue is set to Liquid Optical Clear Adhesive (LOCA).

Another method for manufacturing an electrochromic automobile rearview mirror body structure includes: (a) a step of forming an electrochromic element comprising a first substrate, a second substrate, an adhesive, and an electrochromic solution; (b) a cutting and sizing a step of: affixing an optical double-sided tape of a desired shape to a third substrate in advance; (c) a bonding step of attaching the sizing surface of the third substrate to the electrochromic element And (d) a pressure baking step of press-baking the electrochromic element and the third substrate and extruding the bubble of the optical double-sided tape; wherein the optical glue is set to Solid Clear Adhesive (OCA).

The present invention has the following effects by the above technical means: the present invention is applied between the second substrate and the third substrate by a high transmittance optical adhesive, and is not on the third substrate. It is necessary to plate a multi-layer film, and it is possible to select a metal having high reflectivity such as silver, aluminum, aluminum-titanium alloy or aluminum alloy according to actual needs, or to plate a multi-layer with high refractive material and low refractive material. The coating achieves special requirements, and thus the present invention is a low-cost electrochromic lens that does not require a polarizing and reflecting substrate and is simple in process.

(1) ‧‧‧ Rearview mirror structure

(10)‧‧‧Electrochromic components

(11)‧‧‧First substrate

(111)‧‧‧Transparent conductive layer

(112) ‧‧ ‧ misplaced edge

(12)‧‧‧Second substrate

(121)‧‧‧Transparent conductive layer

(122) ‧‧ ‧ misplaced edge

(13) ‧‧‧Adhesives

(14) ‧‧‧Confined space

(141)‧‧‧Injection

(15)‧‧‧Electrochromic solution

(20)‧‧‧ Third substrate

(21)‧‧‧Polarized and reflective substrates

(30)‧‧‧Optical adhesive

(40)‧‧‧ Display

(9)‧‧‧Mirror body

(91)‧‧‧Electrochromic

(92)‧‧‧Second substrate

(93) ‧‧‧Silver

(94)‧‧‧Protective paint

(95)‧‧‧ Display

(96)‧‧‧Polarized and reflective substrates

(97)‧‧‧Multilayer film coated glass

Fig. 1 is a schematic cross-sectional view showing the structure of a rear view mirror body of an electrochromic automobile of the present invention.

Fig. 2 is a schematic view showing the adhesive on the first substrate of the electrochromic automobile rear view mirror body structure of the present invention.

Fig. 3 is a schematic view showing the combination of a first substrate and a second substrate of the electrochromic automobile rear view mirror body structure of the present invention.

Fig. 4 is a flow chart showing the manufacturing method of the electrochromic automobile rearview mirror body structure of the present invention.

Fig. 5 is a flow chart showing another manufacturing method of the electrochromic automobile rearview mirror body structure of the present invention.

Figure 6: The structure of the first rear view mirror body.

Figure 7: The second-style rear view mirror body structure.

Figure 8: The structure of the third-view rear view mirror body.

Referring to FIG. 1 to FIG. 5, the present invention is an electrochromic automobile rearview mirror body structure (1) and a manufacturing method thereof, which are first taken with an area of 10 cm x 6 cm and a thickness of 1.6 mm and transmitted. a glass having a rate of at least 75% or more, and a transparent conductive layer (111) and (121) having a resistance of 15 ohms on the inner surface thereof as a first substrate (11) and a second base of the present invention, respectively. The material (12) was further filled with 100 g of epoxy resin and mixed with at least 1% of glass beads having a diameter of 120 μm to further form an adhesive (13). Further, the long side of the first substrate (11) is directed upward, and the adhesive (13) is applied to the periphery of the first substrate (11) by a dispenser. The width of the adhesive (13) applied to the three edges of the first substrate (11) is set to be between 0.2 mm and 0.3 mm, and the adhesion of the bottom long side of the first substrate (11) is applied. The agent (13) is about 2 mm from the offset edge (112) of the first substrate, as shown in Fig. 2. On the other hand, one side of the short side of the first substrate (11) needs to leave an injection port (141) of about 2 mm width for use as an injection electrochromic solution (15).

Then, the second substrate (12) is uncoated, and is to be offset by 1.5 mm with respect to the first substrate (11) during bonding, thereby forming misaligned edges (112) and (122), as shown in FIG. It is indicated that it is used as the last metal electrode to be fitted. When the first substrate (11) and the second substrate (12) are attached to the glass, the epoxy resin of the adhesive (13) has a height, so it is not pressed to the height of the glass ball. Spread out sideways. Moreover, when the height of the epoxy resin is spread due to the height of the glass ball, a first sealed space is formed between the first substrate (11) and the second substrate (12) (14). , as shown in Figure 5 below. First bonding the first substrate (11) with the adhesive (13), the second The substrate 12 was placed in an oven and baked continuously at 120 ° C for 1 hour to allow the adhesive 13 to dry thoroughly.

Another 20 grams of acrylic powder was added to 1000 ml of anhydrous propylene carbonate to heat until the acrylic powder was completely dissolved and then cooled to room temperature, weighing 15 grams of Benzylviologen Tetrafluoroborate, 3 grams of ferrocene ( Ferrocene), 0.1 g of lithium perchlorate is poured into acrylic propylene carbonate mixed with acrylic powder until it is dissolved and filtered to prepare an electrochromic solution (15).

Place the configured electrochromic solution (15) in a glass dish, and then mount the first substrate (11) and the injection port (141) of the second substrate 12 downward after baking. The glass plate of the electrochromic solution (15) can be placed in a closed chamber (without drawing) for vacuuming, vacuuming the closed chamber, and allowing the vacuum pressure to reach 0.3 torr. The glass disk with the configured electrochromic solution (15) is raised, and when the electrochromic solution (15) hits the injection port (141), it stops rising. The manual valve in the closed cavity configuration is slowly opened and the vacuum pressure value is gradually returned to an atmospheric pressure, and the electrochromic solution (15) in the glass disk slowly fills the component chamber through the population (141).

The component which has been filled with the electrochromic solution (15) is taken out and then inserted into the injection port (141) with a glue material (not shown) which can be cured by ultraviolet light, and the wavelength is 300 nm to 400 nm in 10 seconds. The UV lamp tube cures the glue to complete an electrochromic element (10). A conductive metal electrode (not shown) commonly used in TN type LCDs is then encased in the two misaligned edges (112) and (122) of the electrochromic element (10).

Please refer to FIG. 4, after the electrochromic element (10) is completed, another liquid optical glue (30) is applied to the third substrate (20), and the third base is further The material (20) is plated with a multilayer film or silver plated, or a polarized and reflective substrate (21) having the same size and thickness of 1.1 mm, and is slowly pasted after the third substrate (20) is positioned. On the back of the electrochromic element (10), After the optical adhesive (30) is diffused to the entire third substrate (20), the optical adhesive (30) is completely cured by the ultraviolet lamp to no longer flow, and the overflowed optical adhesive (30) is wiped clean. The third substrate (20) can be a reflective layer and a polarizing layer, which can be completed as the rear view mirror body structure 1 of the present invention, and a display can be connected to the rear view mirror body structure (1) ( 40). The above optical glue (30) can use Liquid Optical Clear Adhesive (LOCA), and the dupont Vertak DBA1000 series liquid optical clear adhesive is LOCA glue.

Please refer to Fig. 5, and another side of the two-piece release film of the optical film (30) having a thickness of 250 μm is first torn and pasted with a multilayer film or silver plated. Or a polarized and reflective substrate (21) of the same size, 1.1 mm thick of the third substrate (20), and the other release film is peeled off and attached to the electrochromic element of the present invention. The rear side of (10) is placed in a pressurized oven and solidified to complete the rear view mirror body structure (1) of the present invention, and a display (40) can be attached to the rear view mirror body structure (1). . The above optical glue (30) can use Solid Clear Adhesive (OCA), and the solid ribbon optical glue of 3M CEF0810 with a thickness of 250 μm is OCA glue.

In summary, the present invention relates to an "electrochromic automobile rearview mirror body structure and a method of manufacturing the same", which is applied between a second substrate and a third substrate by a high transmittance optical adhesive. Moreover, it is not necessary to apply a multilayer film on the third substrate, and a metal having high reflectivity such as silver, aluminum, aluminum titanium alloy or aluminum alloy may be selected according to actual needs, or may be plated with high refraction. The multi-layer coating of materials and low-refractive materials meets the special requirements. Therefore, the present invention is a low-cost electrochromic lens which does not require a polarizing and reflecting substrate and has a simple process, and its constituent mechanisms have not been seen in various Books or public use, in line with the requirements of the invention patent application, please ask the Bureau to identify the patent, as soon as possible to grant patents, to pray.

(1) ‧‧‧ Rearview mirror structure

(10)‧‧‧Electrochromic components

(11)‧‧‧First substrate

(111)‧‧‧Transparent conductive layer

(112) ‧‧ ‧ misplaced edge

(12)‧‧‧Second substrate

(121)‧‧‧Transparent conductive layer

(122) ‧‧ ‧ misplaced edge

(13) ‧‧‧Adhesives

(14) ‧‧‧Confined space

(15)‧‧‧Electrochromic solution

(20)‧‧‧ Third substrate

(21)‧‧‧Polarized and reflective substrates

(30)‧‧‧Optical adhesive

(40)‧‧‧ Display

Claims (9)

An electrochromic automobile rearview mirror body structure comprises: a first substrate, which is made of conductive glass; and a second substrate, which is also made of conductive glass, and is attached to the first base by an adhesive. And forming a sealed space; an electrochromic solution is disposed in the sealed space; a third substrate is disposed on the outer side of the second substrate by an optical glue; thereby achieving unnecessary An electrochromic mirror body that polarizes and reflects the substrate and is simple in process. The electrochromic automobile rearview mirror body structure according to claim 1, wherein the first substrate and the second substrate have a light transmittance of at least 75% or more and a surface resistance of 15 ohms. The electrochromic automobile rear view mirror body structure according to claim 1, wherein the adhesive is a mixture of an epoxy resin and a glass ball. The electrochromic automobile rearview mirror body structure according to claim 1, wherein the third substrate is a multi-layered film glass body, or has high reflectivity such as silver plating, aluminum, aluminum titanium alloy or aluminum alloy. The vitreous body. The electrochromic automobile rear view mirror body structure according to claim 1, wherein the optical glue is liquid optical clear adhesive (LOCA) or solid optical clear adhesive (Opatically Clear Adhesive, OCA) ). The invention relates to a method for manufacturing an electrochromic automobile rearview mirror body structure, comprising: (A) a step of forming an electrochromic element, comprising a first substrate, a second substrate, an adhesive and an electric The discoloration solution constitutes the electrochromic element; (B) a smear step is applied to a third substrate by a liquid optical glue; (C) a bonding step is a coating surface of the third substrate Laying on the back surface of the electrochromic element, and pressurizing to spread the optical glue between the second substrate and the third substrate, and wiping off the overflowed optical glue; And (D) a curing step of irradiating the electrochromic element and the third substrate with ultraviolet rays to cure the optical glue; thereby producing an electrochromic lens body that does not require polarizing and reflecting the substrate and has a simple process. The manufacturing method according to claim 6, wherein the optical adhesive is a Liquid Optical Clear Adhesive (LOCA). A method for manufacturing an electrochromic automobile rearview mirror body structure comprises: (a) a step of forming an electrochromic element, comprising a first substrate, a second substrate, an adhesive, and an electric a color changing solution constituting the electrochromic element; (b) a cutting and sizing step of attaching an optical double-sided tape of a desired shape to a third substrate in advance; (c) a bonding step Laminating the sizing surface of the third substrate to the back surface of the electrochromic element; and (d) a pressure baking step of press-baking the electrochromic element and the third substrate The bubble of the optical double-sided tape is extruded; thereby producing an electrochromic mirror body which does not require polarizing and reflecting the substrate and has a simple process. The manufacturing method according to claim 8, wherein the optical adhesive is an optical clear adhesive (OCA).