When the first window appeared in human dwellings, no one could have foreseen that the expansive glass curtain walls of today's modern cities would give rise to a global challenge: light pollution and intense indoor glare. Although traditional PDLC glass films can block the line of sight, they fail to genuinely regulate light. Facing diverse scenarios such as offices, sunrooms, and homes, their limitations have become increasingly obvious-not only failing to mitigate indoor light pollution, but also indirectly driving up energy consumption and accelerating the aging of furniture and home furnishings. Our mission is to integrate smart films onto glass, transforming static daylighting into controllable "Light & Thermal Management."
Clearly, traditional light and thermal solutions have their limitations:
PDLC Films: They can only "turn opaque" to block the view, failing to regulate light levels or block solar heat.
Conventional EC (Electrochromic) Tinting: The light transition is slow, and the material easily degrades and turns yellow under high temperatures and intense UV radiation.
To tackle these challenges, Difei has launched the next-generation EPC (Electro-photochromic / Electrochromic) Smart Dimming Film.
As an expert in EPC technology, Difei precisely coats its proprietary dimming slurry between two ITO conductive films, which is then cross-linked and cured via UV light to form a high-performance film. Breaking through the limitations of traditional PDLC, it seamlessly integrates second-scale response, continuous stepless dimming, and 99.9% UV and IR blockage-delivering a comprehensive light and thermal management solution for every scenario in modern living.
Core Technology Principle & Key Advantages
The core breakthrough of Difei's EPC dimming technology lies in the innovation of its electrochromic layer materials. Through nanoscale material innovation and a proprietary formulation, we uniformly disperse poled crystals within a polymer matrix to form the dimming film. Under an applied electric field, the poled crystals undergo dipole rotation and complete directional alignment, dynamically altering the refraction and scattering of light passing through the film layer to achieve second-scale, continuous stepless adjustment of light transmittance.
Driven by this advanced material mechanism, Difei EPC Smart Dimming Film establishes five key competitive advantages, setting a new performance benchmark for the industry:
Second-Scale Ultra-Fast Response: Overcomes the slow transition of traditional electrochromic (EC) technology, achieving second-scale switching between clear and tinted states.
Ultra-Low Energy Consumption: Static operating power is stably kept at $\le 1\text{ W/m}^2$, maintaining effortless operation even under extreme working conditions from $-40^\circ\text{C}$ to $90^\circ\text{C}$.
High UV Blockage: Blocks over 99% of UV rays in both power-on and power-off states, effectively protecting indoor furniture and home furnishings from photo-aging and fading.
Exceptional Extreme-Environment Tolerance: Easily withstands an extreme temperature span from $-40^\circ\text{C}$ to $90^\circ\text{C}$. Furthermore, it resists yellowing and delamination under long-term intense UV exposure, offering a service life exceeding 10 years.
Versatile Smart Control: Seamlessly integrates with mobile apps and wireless remote controls, and supports linkage with light sensors for intelligent, automatic adjustments based on ambient lighting.
Product Structural Architecture: Film & Glass Systems
To meet diverse engineering processing and product integration requirements, Difei-as a specialized product and materials manufacturer-provides a complete supply chain ranging from base dimming films (EPC Film) to finished dimming glass assemblies (EPC Glass).
As the core of the entire system, the EPC Smart Dynamic Dimming Film is manufactured using precision Roll-to-Roll (R2R) coating and UV cross-linking curing processes. Its physical structure is illustrated below:
EPC Smart Dynamic Dimming Glass is an intelligent optoelectronic glass product manufactured by laminating the aforementioned smart film between two layers of glass through a high-temperature and high-pressure process. Its typical laminated structure is illustrated below:
Core Performance & Physical Specifications
The test data for Difei EPC Smart Dimming Film are presented below:
|
Performance Metrics |
Official Parameters & Specifications / Details |
Industry Competitive Advantages |
|
Visible Light Transmittance (VLT)(VLT)(0-110V) |
H款(Product Options): 2% - 65% D款: 1% - 55% |
Ultra-Wide Dynamic Dimming Range |
|
Dimming Contrast Ratio |
Standard: 50x | Customizable: Up to 200x |
Achieve Ultimate Light-to-Dark Contrast |
|
(Haze) |
ON (On-State): ＜ 5% OFF Off-State): 100% |
Ultra-clear in the bright state, highly shading in the dark state. |
|
UV Blocking Rate |
ON: 99% | OFF: 99.9% |
Ultimate UV Protection |
|
Response Time |
OFF ➔ ON：≤ 2秒 ON ➔ OFF：≤ 9秒 |
Far faster than conventional electrochromic glass |
|
Operating Temperature Range |
-40℃ -- 90℃ |
Adaptable to extreme climates virtually anywhere worldwide |
|
System Power Consumption |
≤ 1 W/m² |
Low Power Consumption, The Premier Choice for Green Buildings |
|
Switching Cycle Life Test |
＞ 1,000,000 (Testing Environment) |
Long-lasting Durability Assurance |
|
Maximum Manufacturing Size |
Width up to 1.6m, unlimited length (Single sheet area > 5m²) |
Meets the demand for large and extra-large curtain walls |
|
Performance Metrics |
Official Parameters & Specifications / Details |
Industry Competitive Advantages |
|
Visible Light Transmittance (VLT)(VLT)(0-110V) |
H款(Product Options): 2% - 65% D款: 1% - 55% |
Ultra-Wide Dynamic Dimming Range |
|
Dimming Contrast Ratio |
Standard: 50x | Customizable: Up to 200x |
Achieve Ultimate Light-to-Dark Contrast |
|
Haze |
ON (On-State): ＜ 5% OFF (Off-State): 100% |
Ultra-clear in the bright state, highly shading in the dark state. |
|
UV Blocking Rate |
ON: 99% | OFF: 99.9% |
Ultimate UV Protection |
|
Response Time |
OFF ➔ ON：≤ 2秒 ON ➔ OFF：≤ 9秒 |
Far faster than conventional electrochromic glass |
|
Operating Temperature Range |
-40℃ -- 90℃ |
Adaptable to extreme climates virtually anywhere worldwide |
|
System Power Consumption |
≤ 1 W/m² |
Low Power Consumption, The Premier Choice for Green Buildings |
|
Switching Cycle Life Test |
＞ 1,000,000 次(Testing Environment) |
Long-lasting Durability Assurance |
|
Maximum Manufacturing Size |
Width up to 1.6m, unlimited length (Single sheet area > 5m²) |
Meets the demand for large and extra-large curtain walls |
Advantages and Applications of Laminated Types in Extremely Hot Regions like the Middle East
In long-sunshine and high-temperature environments like the Middle East (e.g., Kuwait, UAE), our EPC laminated glass film delivers exceptional performance:
1. Lowering Air-Conditioning Energy Consumption
When using the EPC Insulated Laminated Combination:
U-Value: As low as 0.90 in winter, and 1.15 in summer.
Shading Coefficient (SC): Drops to 0.17 in the dark state, effectively blocking heat accumulation indoors and significantly reducing operating costs for commercial buildings.
2. Extreme Climate Resilience & Automotive-Grade Aging Test
Max Transmittance Change: Only 2%
Min Transmittance Change: Only 0.5%
Yellowness Index Change : Only 1.6
Conclusion: Zero delamination, zero yellowing, and minimal performance degradation under prolonged exposure-delivering industry-leading weatherability.
3. All-Scenario Application Ecosystem
Exceptional physical properties paired with safety lamination technology allow Difei EPC (Laminated Type) to be widely adopted across high-value sectors:
Architectural Engineering: Landmark curtain walls, premium office buildings, and healthcare facilities.
Smart Home: Switchable wardrobes, high-end display cabinets, and smart coffee tables.
Specialized Security: Sightseeing elevator shafts, bulletproof glass, and electromagnetic shielding systems.
The upgrade of a single film is far from enough to define the true impact of Difei EPC Smart Film. What it truly represents is the future of thermal and light management solutions.
We now offer deep custom services-from technology to execution-for global engineering contractors and system integrators.
