Geshino Group is founded in 2008, Which is a comprehensive enterprise group with strong strength and great innovative vitality in the field of electronics.

it has focused on the research and development and application of electronic technology. Adhering to the concept of "innovation drives development, quality creates the future", it has steadily risen in the industry and has become an industry leader integrating research and development, production, sales and services.

Geshino group has two brands GeshinoLED & GeshinoFilm. It invest heavily in R&D to maintain our competitive edge. With a dedicated laboratory and a team of 30+ experts, we've developed over 50 patented technologies in the LED & automotive film industry, whose members come from well-known universities and scientific research institutions around the world. Geshino Group has made major breakthroughs in key technology fields such as electronic materials and intelligent control, laying a solid foundation for the group's sustainable development. With its excellent management system and strict quality control, the group has established a good reputation for high quality and high technology in the industry.

GeshinoLED(founded in 2008 in Shenzhen) focuses on the research and development and production of LED products and is the core force of the group in the field of lighting and display. The factory has a modern production base of more than 40,000sq.m, equipped with a number of internationally advanced automated production lines. From raw material procurement to finished product delivery, each process undergoes strict quality inspection to ensure the reliability and stability of product quality. GeshinoLED has achieved remarkable results in LED technology, optical design, intelligent control and other aspects.

GeshinoFilm(founded in 2012 in Shanghai) As the key layout of Group in smart film, GeshinoFilm is committed to the research and development, production and sales of smart film. The factory covers an area of 50,000 square meters, has advanced dust-free production workshops and sophisticated production equipment, and has an annual production capacity of 30 millions square meters. Relying on the strong R&D strength of the group, GeshinoFilm has mastered a number of core technologies of Smart film, and has independent intellectual property rights and a number of patents. The products are mainly used in architectural decoration, automobile manufacturing, electronic display and other fields. Through electric field control, the glass can switch between transparent and fogged states to meet the privacy protection and lighting needs in different scenarios.

All GeshinoFilm Serie has passed the Rhos, CCC, CE, FCC, ETL,ASTM,LVD.

GeshinoLED & GeshinoFilm work closely together. In R&D, they share the group's scientific research resources, jointly overcome technical difficulties, and accelerate product iteration and upgrading; in supply chain management, they use the group's scale advantage to realize centralized procurement of raw materials, reduce costs and ensure supply; in market expansion, they rely on the group's brand influence and global marketing network to rapidly increase market share. By integrating the advantageous resources of its factories, the group has formed a strong synergy effect, continuously expanded its business territory and improved its market competitiveness. In the future, it will continue to increase its investment in innovation in the electronics field, provide global users with smarter and higher-quality electronic products and services, and lead the new trend of the electronics industry.

GeshinoFilm Production Process

I. Strict selection of raw materials

A): PET & ITO Layer

Ultra-flat PET film:

GeshinoFilm only uses imported optical-grade PET (Japan Toray, Japan Mitsubishi, Korea SKC), with a thickness tolerance of ±1%, surface roughness Ra≤0.1μm, and transmittance＞95%.

Nano-level conductive materials:

Indium tin oxide (ITO): Multilayer composite films (such as ITO+AZO+ITO) are plated by magnetron sputtering, with a square resistance of ≤15Ω/□, transmittance＞88%, and anti-bending performance is improved by 3 times (can withstand 100,000 folding tests).

Alternatives: Nano silver wire (wire diameter <20nm) or single-walled carbon nanotube (SWCNT) conductive layer, suitable for flexible curved scenes, conductivity＞10⁶ S/m.

B): High-end PDLC slurry

Liquid crystal material:

Using chiral nematic liquid crystal or fluorinated liquid crystal (such as Merck E7 series improved type), the response speed is increased to ≤50ms, and the operating temperature range is extended to -40℃~85℃ (0℃~60℃ for ordinary products).

Polymer system:

Using UV-curable acrylate prepolymer (such as Sartomer CN2200), adding nano-silicon dioxide (particle size 50nm, dispersion ≤5%) to enhance mechanical properties, glass transition temperature (Tg)＞120℃.

Additive upgrade:

Adding light stabilizer (HALS) and antioxidant (hindered phenol), the UV resistance time is ≥5000 hours (about 2000 hours for ordinary products).

II. Ultra-precision coating and coating process

A): Vacuum magnetron sputtering coating

Multi-target co-sputtering:

In an environment with a vacuum degree of <10⁻³ Pa, ITO target and aluminum oxide (Al₂O₃) target are sputtered in sequence to form an ITO/Al₂O₃/ITO sandwich structure, which improves the scratch resistance of the conductive layer (hardness up to 4H).

Online detection:

Equipped with a laser thickness gauge (accuracy ±1nm) and a four-probe tester (resolution 0.1Ω/□), real-time monitoring of film uniformity, local thickness deviation ≤2%.

B): Nano-scale slurry coating

Slit coating + vacuum drying:

Use a micro-gravure coating head (accuracy ±0.5μm) to coat PDLC slurry in a vacuum environment (pressure ≤50kPa) to avoid bubble mixing. The coating thickness is controlled at 20±0.5μm, and the surface density deviation is ≤1.5%.

Gradient temperature pre-curing:

Temperature control in three stages (40℃→60℃→80℃, 10 minutes each) to gradually volatilize the solvent (such as cyclohexanone) and form a stress-free liquid crystal-polymer precursor structure.

III. Vacuum lamination and UV curing upgrade

A): Vacuum hot pressing lamination

Dual chamber vacuum laminator:

The first layer (lower electrode + PDLC layer) and the second layer (upper electrode + protective layer) are preheated in a double-station vacuum chamber (80℃, 5 minutes), and then laminated through a precision alignment system (accuracy ±5μm), and finally pressurized for 30 minutes under **0.01MPa vacuum degree + 120℃** to ensure that there are no micro bubbles between the layers.

B): UV curing system upgrade

Pulse UV curing:

Using LED-UV pulse light source (peak light intensity > 20W/cm², wavelength 365±5nm), irradiation time 50~100ms, instant curing, avoiding polarization drift of liquid crystal due to long-term heating.

Nitrogen protection curing environment:

High-purity nitrogen (purity 99.999%) is introduced into the curing chamber, and the oxygen content is <10ppm, which inhibits the oxidation and yellowing of the polymer and ensures that the long-term transmittance attenuation is <3% (the attenuation of ordinary products is about 8%).

IV. Precision post-processing and strict testing

A): Laser cutting and edge sealing

Picosecond laser cutting:

Using ultra-short pulse laser (pulse width <10ps) to cut the film material, the edge heat-affected zone is <10μm, avoiding edge delamination caused by traditional mechanical cutting.

Nano coating edge sealing:

The silicon dioxide (SiO₂) coating is deposited on the edge by vapor deposition (CVD) process with a thickness of 200~500nm to form a moisture-proof and oxygen-proof "molecular-level sealing layer". The performance retention rate after the heat and humidity test (85℃/85% RH, 1000 hours) is >95%.

B): Full process optical inspection

Laser speckle detection:

The film surface is irradiated with a 635nm laser beam, and the speckle pattern is captured by a CCD camera. The AI algorithm analyzes the uniformity of the liquid crystal droplet distribution, and the maximum droplet size deviation is allowed to be <5%.

Dynamic response test:

In a -40℃~85℃ temperature box, a high-speed camera (frame rate 1000fps) is used to record the atomization-transparent switching time of the power-on/power-off process, and the response speed fluctuation in the whole temperature range is required to be ≤10%.

Life Accelerated Test:

The xenon lamp aging test chamber (irradiance 1.2kW/m², cycle 120 minutes) was used to simulate a 10-year outdoor environment. After the test, the transmittance decay was <5% and the haze change was <2%.

V. Intelligent Production and Traceability System

A): Digital Production Line

Equipped with MES system to monitor the parameters of each process (such as coating thickness, curing light intensity, lamination pressure) in real time, with a data acquisition frequency of 10 times/second. In case of abnormality, it will automatically trigger shutdown and trace the first 100 meters of products.

Visual Inspection Robot:

Equipped with a linear array CCD camera (resolution 1200dpi) and a deep learning algorithm, it can achieve 100% surface defect detection (minimum recognition size 0.1mm), and the rejection rate is ≤0.05%.

B): Key Technology Breakthrough Points

Molecular-level uniformity control: Through nanomaterial dispersion technology and vacuum process, the particle size distribution of liquid crystal droplets is concentrated in 2~3μm (4~6μm for ordinary products), and the optical scattering efficiency is increased by 30%.

Wide temperature range stability: Through fluorinated liquid crystal and high temperature resistant polymer, the optical performance fluctuation in the full temperature range of -40℃~85℃ is less than 5% (the fluctuation of ordinary products is about 15%).

Ability to resist extreme environments: After 100kPa high-pressure water washing and salt spray corrosion (5% NaCl, 1000 hours) tests, the resistance change of the conductive layer is less than 3%, and the interlayer adhesion retention rate is greater than 98%.

GeshinoFilm not only relies on equipment precision and material innovation, but also ensures process stability through the Six Sigma quality management system (DPPM≤50) and ISO 14644-1 Class 5 clean workshop (dust particles ≤3520/m³, ≥0.5μm). This is why GeshinoFilm can be applied for scenes with extremely high safety and reliability requirements.