- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
Views: 0 Author: Site Editor Publish Time: 2025-08-15 Origin: Site
The anti-peeping principle of anti-spy films is primarily based on ultra-fine louver optical technology. This technology achieves the anti-peeping effect by “embedding” thousands of louver layers with ultra-thin blades into the protective film to control the propagation direction of light. Specifically, it includes the following aspects:
1. Light Control
By applying the louver principle, the anti-spy film integrates a “louver-based anti-peeping structural layer” into the screen layer. Through light angle control, it converts the screen’s wide viewing angle into a narrow one. This means that only the user facing the screen directly can receive sufficient light to view the screen clearly, while onlookers at a certain angle to the screen receive weak light, making the screen appear completely dark from their perspective.
2. Micro-Structure Composition
An anti-spy film is not a simple single-layer “film”; instead, it consists of multiple structural layers. Among these, the anti-peeping structural layer is the core component that fulfills the “anti-peeping” function. Unlike other horizontal layers, this layer features vertical grating structures similar to unfolded louvers—only the parallel slits in these structures allow light to pass through.
3. Optical Effect
When light is incident vertically on the anti-spy film, it can pass through unobstructed. As the incident angle of the light increases, the light is gradually blocked by the louver structure, and the amount of transmitted light decreases accordingly.
4. Viewing Angle Restriction
The anti-spy film prevents light from passing through the screen and reflecting back to form a visible display at certain angles. This achieves the anti-peeping effect by reducing the screen’s visible angle; in simple terms, people beside you will be unable to see the content on your screen clearly.
5. Transmittance Change
Since the grating structure of the anti-peeping layer “blocks” part of the light, the light transmittance of the anti-spy film decreases. Therefore, when using an anti-spy film, you may notice that the screen becomes “darker” to a certain extent, and this is a normal phenomenon.
In summary, the anti-peeping principle of anti-spy films relies on the internal micro-louver structure to control light propagation. This ensures that screen content can only be clearly seen within a certain front-facing angle, while it becomes blurred or invisible from the side due to light obstruction, thus protecting the screen content from being peeped at by others.
