1. CNC electrochromic open a new “ vision ”
　　Why do you need a color-changing glasses? How do color-changing glasses magically complete the color change? How can electrochromic materials solve the optical pain point of AR glasses? Come and follow the small sincere into this live review portal!

　　Ms. Chen Ye Yue, founder and CEO of BearSunny Technology (c position) live communication and sharing session

　　The human "curiosity" about the unknown, like the evolutionary process of evolution, guides us to explore the endless mysteries and the vastness of the universe. In the never-ending exploration of the vastness of the stars, in addition to endless questions, it also brings "innovation". It is also because of the natural curiosity of human beings that we have been driven to explore more and more in the field of science and technology. This time's live guest, Ms. Chen Yueyue (York), CEO of Boyu Technology, verifies to us what the new "vision" innovation is brought by the curiosity of the exploration process.
　　We long to be able to bask in the sunlight, to go out easily and conveniently, to keep the windows of our mind (eyes) from being hurt, and so on. Strong light or uncomfortable light is blinding and prevents us from opening the windows of our minds to receive information about good things, and can even pose a safety hazard. So the development of a suitable color-changing glasses not only can resist the fierce and harsh light, protect the eyes from harm and thus reduce the occurrence of cataracts, but also let myopic partners can easily go out with just one glasses.York's team has not given up on the exploration of the unknown and the thirst for the starry sea. They believe that the drive that drove the fish to the shore 10,000 years ago is driving us to fight for our whole life in a billion years. BeruTech firmly believes that cutting-edge exploration of technology will allow us to see the future (Make Your Vision Manageable).The following video product shown is the Banyu Technology CNC color-changing smart sunglasses V1.0 - Eison01 prototype, which features touch color change adjustment, three adjustable color change gears, two-week charging, and one second into color change. In February 2021, Samsung released a promotional video for its AR glasses Samsung Glasses Lite, which caused a new wave in the industry. From its promotional video, you can see that the glasses not only achieve lightweight integrated structure, but also realize the effect of "one click color change of lenses" from indoor to outdoor - Samsung officially defined as Sunglasses Mode. The "one-touch color changing lens" solution is derived from BearSunny's CNC electrochromic material, which enables multi-grade light transmission adjustment by touch, and "adaptive" function.

　　Image from BearSunny Technology: Quick Flash intelligent CNC color changing lens

　　*The video will be shown in the PPT

　　With the launch of AR glasses by Facebook, Google, Samsung and other leading companies in recent years, electronic products are developing into augmented reality electronic wearable devices. The "CNC color changing lens" independently developed and produced by BearSunny Technology can well solve the AR optical pain points: ① the virtual image projected is not clear in the bright environment; ② the pain point that the virtual object projected is not real. The effect shown in the duck imaging as below, AR glasses are different from VR in that they need to integrate reality with reality and reach interaction with the real scene, currently most domestic AR glasses can achieve this state in the middle, and the projected objects float on top of the real scene, but BearSunny Technology solves the problem of consistent lighting through the combination of material + software + algorithm + sensor, so that The "dynamic" real-time adjustment of the intensity of the real image and the virtual image is to achieve "virtual and real lighting consistency", so that the brightness of the ambient light changes, so that the AR glasses to achieve a true integration of reality and reality. According to York, BearSunny Technology has laid out two types of glasses for array, diffraction and holographic waveguide solutions, which are also two ways to apply electrochromic materials in AR: ① Coating based on glass substrate, which is front-loading and requires intervention in the design of AR glasses, so that it can effectively combine with waveguide lenses to complete the integration of color-changing function without increasing weight and thickness (Shanghai KunYu) After the synthesis of photoelectric waveguide lens, CNC color changing module is introduced in detail below); ② flexible film, which can be attached to existing AR glasses by way of rear installation.

　　Image from BearSunny Technology

　　Second, the code to unlock the new "vision" of the attack
　　According to the official consultation of Vipshop, electrochromic materials are currently recognized as one of the most promising smart materials, which are becoming more and more common in people's daily life and will change color when stimulated by external conditions such as electric field and current. It is expected to become a core technology in the future consumer electronics field and can be widely used. Because of its low driving voltage, controllability, sensitivity, reversibility and memory of color change, it is widely used in the fields of photoelectrochemical energy conversion and storage, electrochromic smart dimming window, non-glare reflector and electrochromic information memory. However, due to the complex preparation process of electrochromic materials, there are no more than 10 companies in the world that have mastered the mature preparation process. BearSunny Technology combines electrochromic technology and 3D printing technology together to solve the trouble of people with visual impairment who need to carry two glasses to reduce the glasses easily lost after removal. The beginning is through different color changing solutions, with different advantages and disadvantages, can be selected according to the application scenario, as the following table reference BearSunny Technology choose the best color changing method is electrochromic. Electrochromic or to solve the modern deteriorating urban light pollution problem, is a development direction of energy-saving building materials.

　　Image from BearSunny Technology

　　     
　　This live broadcast York has unlocked the "code" of NC electrochromic materials for us. The figure below shows the electrochromic material (inorganic oxide based) through the redox reaction to change the valence state, the material can be digitally controlled according to the demand of light transmission, and finally change the color and light transmission.

　　图片来源于伯宇科技

　　According to York, BearSunny's Quick Flash series of CNC color changing materials belong to inorganic all-solid structure, which can present different light transmittance under specific voltage and different energizing time, thus realizing digital control of color changing, and different spectral curves can be realized by matching effects of different film layers. As shown in the figure below, the color change principle is similar to that of thin film lithium batteries. The rate of color change is determined by the voltage applied to the transparent conductive layer, and the depth of color change is determined by the duration of energization.

　　Image from BearSunny Technology

　　The Quick Flash series of CNC color-changing materials from BearSunny Tech can customize the CNC spectral curve according to the customer's needs and truly achieve intelligent light control. It can realize the full range of transmittance 79% to 9% arbitrary adjustment to meet the needs of different scenes, the error range is only 5%, and the complete closed loop of the full range of spectacle lens size adjustment can be completed in only 2~3 seconds.

Image from BearSunny Technology

　　Electrochromic (EC) materials are typical cross-disciplinary technologies with very complex preparation processes. The implementation of electrochromic materials in the market is not uniform, and the mainstream material solutions contain three major types: inorganic all-solid, organic polymer/small molecule, and dye liquid crystal. Due to the differences in the formulation of electrochromic materials, the final formed materials also have large differences in light transmission, lifetime, UV absorption capacity and heat resistance. BearSunny Technology uses a self-developed inorganic all-solid material (formulation based on the team of Professor Junqiao Wu at UCB Lawrence National Laboratory). This solution has the advantages of wide range of light transmission adjustment, stable material performance, long life (up to more than one million times), high UV absorption capacity, and a wide range of extreme temperature resistance.

Image from BearSunny Technology

　　BearSunny technology also with Shanghai KunYou photoelectricity waveguide lens synthesis after the CNC color change module, not to increase the thickness and weight of the original film. The following diagram shows the analysis of the synthesis with the optical waveguide lens after the CNC color change module structure analysis: ① near the inner layer of the eye is the optical degree lens, through its diopter adjustment, can be understood as the lens luminosity is the diopter, that is, the degree of the lens, for example, your eyes are myopic -1.20, the lens luminosity selected is myopic 120 degrees lens, 120 degrees is the lens luminosity. Lens luminosity is generally 25 degrees a jump, starting from 0 degrees, up to several thousand degrees are available; ② middle layer is the optical waveguide lens, through the optical waveguide (Optical Waveguide) technology, so that imaging precision into the human eye visual range, is a kind of light twisting 180 degrees of black technology. The MicroLED screen image hidden in the frame of the glasses is reflected and diffused countless times through the microscopic grating structure of the optical waveguide lens, and is accurately transmitted to the human eye; ③ the outermost layer is the CNC color-changing lens developed by BearSunny Technology, allowing it to achieve active intelligent color change, effectively filtering visible light, infrared light and ultraviolet light, reducing glare damage, while having the characteristics of impact resistance, corrosion resistance, and anti-fog and other characteristics.

*The video will be shown in the PPT

　　Third, the prospect of a new "vision" of the new market
　　Hazy vision, unlocking the beauty of life, this live broadcast we not only learn about the development of BearSunny technology in the present, but also let us find a new "vision" in the field touched by the CNC electrochromic materials to explore. York explained that with the gradual maturity of CPI material, the price of flexible CNC color change film will gradually decrease and the application will be more extensive. There is no shortage of areas in the future where we can see CNC electrochromic materials will shine in four areas.
　　① electrochromic glasses, goggles C-end consumer market: electrochromic smart glasses using the world is currently emerging electrochromic technology and electronic sensor technology, the lens senses the change of sunlight, will automatically produce changes in an instant, strong vision, the lens becomes dark, the sun is weak, the lens becomes bright, but also according to personal preferences for adjustment. At present, domestic and foreign companies produce electrochromic smart glasses have been used in safety helmet goggles, pilot helmets, ski goggles, military anti-sand dimming goggles and fashion glasses. With the functions of UV protection, eye protection and adjustment of eye comfort, they have been liked by skiers, motorists, pilots, military and fashion lovers.

Image from ALU Pop Art Illustration

　　②Application in the field of electrochromic display: Along with the gradual application of transparent display in the field of commercial display, HUD, TV, etc., CNC color change will become the main auxiliary technology of the track. Using the performance of its electrochromic material bistability, the electrochromic display devices made not only do not need backlighting, but also do not consume power after displaying static images, as long as the display content does not change, thus being able to achieve the purpose of energy saving. With the advantages of no blind angle, high contrast ratio, low manufacturing cost, wide working temperature range, low driving voltage and rich color, it will have great application prospects in the fields of instrument display, outdoor advertising and static display. What we can know at this stage is that electrochromic display devices prepared by screen printing technology have been used in smart cards, smart labels, etc.

Image from BearSunny Technology

　　③Electrochromic Smart windows: With its energy-saving and digital characteristics, CNC color-changing film will become a necessary element of intelligent buildings. The electrochromic smart windows have the adjustability of light absorption and transmission under the action of electric field, which can selectively absorb or reflect the heat radiation from outside and stop the internal heat diffusion, reducing the large amount of energy that must be consumed by buildings such as office buildings and residential buildings to keep cool in summer and warm in winter. It also serves to improve the level of natural light, prevent prying eyes, and prevent glare. It can reduce outdoor shading facilities, meet the current needs of lighting and aesthetics of buildings, and solve the problem of modern deteriorating urban light pollution. For example, the first case of commercial use of electrochromic glass in China: Beijing Tencent Building. The glass was purchased from the U.S. company Sage with an area of 1,700 square meters for the light roof, at a unit price of ¥18,000/㎡, and took 5 years to build. Can be seen in the figure below.

Image from BearSunny Technology

　④Automotive automatic anti-glare rearview mirror: Strong sunlight and glare from the high beam of trailing cars can cause dazzling reflections on the rearview mirror of cars, causing great safety hazards to road traffic. If the automotive anti-glare rearview mirror technology can be linked with photovoltaic devices, the use of photovoltaic devices to adjust the anti-glare rearview mirror color change by sensing the electrical energy generated by external light, can achieve the dual purpose of energy saving and anti-pollution. Automatic anti-glare rearview mirror prepared with electrochromic materials can adjust the intensity of reflected light according to the intensity of external light through electronic sensing system to achieve the purpose of anti-glare.

Image from BearSunny Technology

　　With the vision of "Make Your Vision Manageable", and the vision of "Linking zillions of people and technology. Linking zillions of hearts with love." Let's follow the pace together and move towards the hard exploration and innovation of generations of technology workers.

　　　Welfare small tweet to teach you how to choose the color ：
　　When choosing color-changing glasses, the main consideration is the functional characteristics of the lenses, the use of the glasses, and the personal requirements for color, etc. The C-end consumer market partners are now in contact with photochromic lenses, which can be made into a variety of colors, such as gray, teal, etc. The future popularity of electrochromic glasses, I believe that we will save the selection of this step.
　　①Grey lenses: they absorb infrared rays and 98% of UV rays. The great advantage of gray lenses is that they do not change the original color of the scene, and the greatest satisfaction is that they reduce the intensity of light very effectively. The gray lens absorbs all color spectrums in a balanced way, so that the scene is only darkened, but without significant chromatic aberration, showing a true natural feeling.
　　② pink lenses: it can absorb 95% of ultraviolet rays, if it is used as corrective eyewear, women who must wear it often better to use light red lenses, because light red lenses have a better absorption of ultraviolet rays, can make the overall light intensity reduced, the wearer will feel more comfortable;.
　　③ light purple lenses: the same as pink lenses, because of its relatively dark color, more popular with mature women. 
　　④ Teal lenses: they can absorb 100% of UV rays, and teal lenses can filter out a lot of blue light, which can improve visual contrast and clarity, so they are popular among wearers. They are especially good in severe air pollution or foggy conditions. They are ideal for drivers because they can block the reflected light from smooth and shiny surfaces, and the wearer can still see the subtle parts. For middle-aged and elderly, more than 600 degrees of high vision patients, can be given priority.
　　⑤ light blue lenses: beach excursions on the beach can wear sun blue lenses, blue can effectively filter out the light blue reflected from the sea and sky. Driving should avoid using blue lenses because it will make us unable to distinguish the color of traffic signals.