CN217099837U

CN217099837U - Infrared high-transmittance anti-glare automobile rearview mirror lens element

Info

Publication number: CN217099837U
Application number: CN202220903215.4U
Authority: CN
Inventors: 虞焚博; 曹贞虎; 胡珊珊
Original assignee: Ningbo Mi Ruo Electronic Technology Co ltd
Current assignee: Ningbo Mi Ruo Electronic Technology Co ltd
Priority date: 2022-04-16
Filing date: 2022-04-16
Publication date: 2022-08-02
Anticipated expiration: 2032-04-16

Abstract

The utility model relates to an infrared high anti-dazzle mesh automobile rearview mirror lens component that passes through, it includes: the transparent conductive film layer is arranged on the first substrate; the infrared high-transmittance composite film layer is arranged on the second substrate, and the second substrate and the first substrate are arranged in a spaced-apart relationship; a sealing member circumferentially disposed between peripheral regions of the first and second substrates to sealingly bond the first and second substrates to each other and define a cavity; and an electrochromic medium disposed in the cavity and in contact with the transparent conductive film layer and the infrared high-transmittance composite film layer. The rearview mirror lens element of the utility model improves the transmittance in the near infrared band on the premise of ensuring the original visible light band reflection function of the electrochromic rearview mirror; meanwhile, after the electrochromic rearview mirror is started to prevent dazzle and change color, a certain transmittance can still be kept.

Description

Infrared high-transmittance anti-glare automobile rearview mirror lens element

Technical Field

The utility model relates to a technical field of rear-view mirror especially relates to an infrared high anti-dazzle mesh automobile rearview mirror lens component that passes through.

Background

With the recent rise of concepts such as DMS (driver monitoring system), ADAS (automatic driving), OMS (passenger detection system), and smart car, biosensors, AI vision technologies, etc. are increasingly used in automobiles. The rearview mirror is a good display platform and a carrying platform of various sensors because the rearview mirror is arranged in the vehicle. Due to the requirements of the sensors, higher requirements are put on the light transmission performance of the rearview mirror in the infrared band. The electrochromic rearview mirror has the functions of preventing dazzling and safe driving, and is widely applied to the inner and outer mirrors of the automobile. However, the transmittance of the existing electrochromic rearview mirror to the 800-plus-1000 nm infrared band is still low, and the performance requirement of new functions cannot be met.

Disclosure of Invention

In view of the deficiencies of the prior art, the utility model provides an infrared high-transmittance anti-dazzle automobile rearview mirror lens component to solve the problem that current electrochromic rear-view mirror is low at near-infrared wave band transmissivity.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

an infrared high-transmittance anti-glare automotive rearview mirror lens element, comprising:

the transparent conductive film layer is arranged on the second surface of the first substrate;

the infrared high-transmittance composite film layer is arranged on the third surface of the second substrate, and the second substrate and the first substrate are arranged in a spaced-apart relationship;

a sealing member circumferentially disposed between peripheral regions of the first and second substrates to sealingly bond the first and second substrates to each other and define a cavity; and

and the electrochromic medium is arranged in the cavity and is in contact with the transparent conductive film layer and the infrared high-transmittance composite film layer.

Preferably, the rear view mirror lens element has a transmittance of more than 60% in the near infrared range of wavelength 800-1000 nm.

Preferably, the mirror lens element has a reflectivity of more than 50% in the visible range of wavelengths 380-780 nm.

Preferably, the infrared high-transmittance composite film layer is formed by adding a conductive dielectric film layer with a high refractive index to a composite dielectric film layer formed by alternately overlapping a plurality of high-refractive-index dielectric films and low-refractive-index dielectric films. The thickness of each layer of the high-refractive-index dielectric film and the low-refractive-index dielectric film is preferably 40-120 nm; the film thickness of the conductive dielectric film layer with high refractive index is preferably 120-180 nm.

Preferably, the high refractive index dielectric film is at least one of niobium oxide, titanium oxide, aluminum oxide, and tantalum oxide.

Preferably, the low refractive index dielectric film is silicon oxide.

Preferably, the conductive dielectric film layer is at least one of ITO, AZO, FTO, and GZO.

Preferably, the infrared high-transmittance composite film layer is formed by at least 6 composite dielectric film layers which are alternately superposed and a conductive dielectric film layer with high refractive index.

Preferably, the outer peripheral region of the first substrate is further provided with an annular shielding layer. More preferably, the annular shielding layer is disposed at a position of a peripheral area of the second surface of the first substrate.

Preferably, the rearview mirror lens element further comprises a first conductive clip and a second conductive clip; one end of the first conductive clamp extends to the corresponding position of the sealing piece and is electrically connected with the transparent conductive film layer, the other end of the first conductive clamp extends to the fourth surface of the second substrate, one end of the second conductive clamp extends to the corresponding position of the sealing piece and is electrically connected with the infrared high-transmittance composite film layer, and the other end of the second conductive clamp extends to the fourth surface of the second substrate.

The utility model has the advantages that:

the infrared high-transmittance anti-glare automobile rearview mirror lens element improves the transmittance of the electrochromic rearview mirror in the near infrared band on the premise of ensuring the original reflection function of the electrochromic rearview mirror in the visible light band; meanwhile, after the electrochromic rearview mirror is started to prevent glare and change color, a certain transmittance can be still maintained; it can meet the integrated application of display device and sensor device with high requirement on light transmission performance of infrared band.

Drawings

Fig. 1 is a schematic structural view of an infrared high-transmittance anti-glare automobile rearview mirror lens element of the present invention;

fig. 2 is a schematic structural view of the infrared high-transmittance composite film layer of the present invention;

fig. 3 is a schematic structural view of another embodiment of the infrared high-transmittance anti-glare automobile rearview mirror lens element of the present invention.

The infrared high-transmittance composite film comprises a first substrate 1, a second substrate 2, a sealing element 3, an electrochromic medium 4, a first conductive clamp 5, a second conductive clamp 6, a first surface 1a, a second surface 1b, a third surface 2a, a fourth surface 2b, a transparent conductive film layer 11, an infrared high-transmittance composite film layer 21, a high-refractive-index dielectric film 211, a low-refractive-index dielectric film 212, a conductive dielectric film layer 213, a cavity 41, a substrate fillet 1c and a shielding layer 12.

Detailed Description

The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1 to 3, the infrared high-transmittance anti-glare automobile rearview mirror lens element of the present embodiment includes a first substrate 1, a second substrate 2, a sealing member 3, and an electrochromic medium 4: the first substrate 1 and the second substrate 2 may be transparent glass or a transparent polymer material with colorless or light color. A transparent conductive film layer 11 is arranged on the first substrate 1, the first substrate 1 comprises a first surface 1a and a second surface 1b, the first surface 1a faces to an observer, and the transparent conductive film layer 11 is arranged on the second surface 1b of the first substrate 1; the second substrate 2 is provided with an infrared high-transmittance composite film layer 21, the second substrate 2 comprises a third surface 2a and a fourth surface 2b, the fourth surface 2b faces away from an observer, the infrared high-transmittance composite film layer 21 is arranged on the third surface 2a of the second substrate 2, the second substrate 2 and the first substrate 1 are arranged in a spaced relationship, and the infrared high-transmittance composite film layer 21 is arranged on the third surface 2a, so that compared with the arrangement on the fourth surface 2b, the problems that the visual experience effect of the observer is poor and even uncomfortable due to a double image phenomenon formed after incident light is refracted in a multipath manner are avoided, meanwhile, the infrared high-transmittance composite film layer is arranged on the third surface 2a, the problems that the film layer is deteriorated due to contact of the film layer and oxygen and water molecules in the environment are avoided, and the long-term service life of the film layer is prolonged; the sealing member 3 is circumferentially disposed between peripheral regions of the first and

second substrates

1 and 2 to sealingly bond the first and

second substrates

1 and 2 to each other and define a cavity 41; the electrochromic medium 4 is arranged in the cavity 41 and is in contact with the transparent conductive film layer 11 and the infrared high-transmittance composite film layer 21. The infrared high-transmittance composite film layer 21 is formed by adding a conductive dielectric film layer 213 with a high refractive index to a composite dielectric film layer formed by alternately overlapping 12 layers of high-refractive-index dielectric films 211 and low-refractive-index dielectric films 212; wherein, the 1 st, 3 rd, 5 th, 7 th, 9 th and 11 th layers are high refractive index dielectric films 211, including but not limited to niobium oxide, titanium oxide, aluminum oxide and tantalum oxide, preferably niobium oxide, with a film thickness of 40-120nm, the 2 nd, 4 th, 6 th, 8 th, 10 th and 12 th layers are low refractive index dielectric films 212 silicon oxide, with a film thickness of 40-120nm, the 13 th layer is a high refractive index conductive dielectric film 213, including but not limited to ITO (indium tin oxide), AZO (aluminum doped zinc oxide), FTO (fluorine doped tin oxide), GZO (gallium doped zinc oxide), preferably ITO, with a film thickness of 120-180 nm; the transparent conductive film layer 11 is ITO, and the thickness of the film layer is 120-180 nm; wherein the 1 st layer is disposed proximate to the third surface 2a of the second substrate 2 and the 13 th layer is disposed distal to the third surface 2a of the second substrate 2. When the rearview mirror lens is in an initial non-electrified color change state, the reflectivity of the rearview mirror lens element in a visible light range with the wavelength of 380-780nm is more than 50%, the transmittance in a near-infrared range with the wavelength of 800-1000nm is more than 60%, the reflectivity is preferably controlled to be more than 55% through film thickness regulation, and the transmittance in a near-infrared band is more than 70%; after the rearview mirror lens is electrified and discolored, the transmission of the rearview mirror lens in a near-infrared band can be more than 50 percent, and more preferably can be more than 55 percent, so that the integrated use of an infrared high-transmission display device and a sensor in an electrochromic rearview mirror lens element is met.

In one embodiment, the outer peripheral region of the first substrate 1 is further provided with an annular shield layer 12. The annular shielding layer 12 is disposed at the position of the outer peripheral area of the second surface 1b of the first substrate 1. The shielding layer 12 is at least one metal or metal alloy layer of Ag, Ti, Al, Cr, Ni, Mo, Ru, Rh, Ir, Pd and Pt, or at least one metal oxide layer of niobium oxide, aluminum oxide, titanium oxide, indium oxide, tin oxide, tantalum oxide, zinc oxide, chromium oxide, copper oxide, manganese oxide, nickel oxide, molybdenum oxide and iron oxide, or a combination of metal, metal alloy or metal oxide. The sealing member 3 and the conductive clip at the peripheral region of the substrate are hidden by the shielding layer 12, so that the whole rearview mirror assembly is more visually attractive. By arranging the shielding layer 12, a frameless or narrow-framed rearview mirror can be manufactured, and the visual field range of the electrochromic anti-glare rearview mirror is further expanded.

In one embodiment, the outer edge of the first substrate 1 is a smoothly-transitioned substrate fillet 1 c. The radius of curvature of the substrate fillet 1c is greater than 2.5 mm.

In one of the embodiments, the rearview mirror lens element further comprises a first conductive clip 5 and a second conductive clip 6; one end of the first conductive clip 5 extends to the corresponding position of the sealing element 3 and is electrically connected with the transparent conductive film layer 11, the other end extends to the fourth surface 2b of the second substrate 2, one end of the second conductive clip 6 extends to the corresponding position of the sealing element 3 and is electrically connected with the infrared high-transmittance composite film layer 21, and the other end extends to the fourth surface 2b of the second substrate 2. The first conductive clip 5 and the second conductive clip 6 can be electrically connected with the transparent conductive film layer 11 and the infrared high-transmittance composite film layer 21 in a direct or indirect manner, so that the rearview mirror element can be quickly discolored after being electrified.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention.

Claims

1. An infrared high-transmittance anti-glare automobile rearview mirror lens element, comprising:

2. The infrared high-transmittance anti-glare automobile rearview mirror lens element as claimed in claim 1, wherein the transmittance of the rearview mirror lens element in the near infrared range of 800-1000nm is greater than 60%.

3. The infrared high-transmittance anti-glare automobile rearview mirror lens element as claimed in claim 1, wherein the reflectivity of the rearview mirror lens element in the visible light range with the wavelength of 380-780nm is greater than 50%.

4. The infrared high-transmittance anti-glare automobile rearview mirror lens element according to claim 1, wherein the infrared high-transmittance composite film layer is formed by a composite dielectric film layer in which a plurality of high refractive index dielectric films and low refractive index dielectric films are alternately stacked, plus a conductive dielectric film layer having a high refractive index.

5. The infrared high-transmittance anti-glare automobile rearview mirror lens element according to claim 4, wherein said high refractive index dielectric film is at least one of niobium oxide, titanium oxide, aluminum oxide, and tantalum oxide.

6. The infrared high-transmittance anti-glare automobile rearview mirror lens element according to claim 4, wherein said low refractive index dielectric film is silicon oxide.

7. The infrared high-transmittance anti-glare automobile rearview mirror lens element according to claim 4, wherein the conductive dielectric film layer is at least one of ITO, AZO, FTO and GZO.

8. The infrared high-transmittance anti-glare automotive rearview mirror lens element according to claim 1, wherein the first substrate is further provided at its peripheral region with an annular shielding layer.

9. The infrared high-transmittance anti-glare automotive rearview mirror lens element of claim 1, wherein said rearview mirror lens element further comprises a first conductive clip and a second conductive clip; one end of the first conductive clamp extends to the corresponding position of the sealing piece and is electrically connected with the transparent conductive film layer, and one end of the second conductive clamp extends to the corresponding position of the sealing piece and is electrically connected with the infrared high-transmittance composite film layer.