Fresnel Projection Screen Structure to Minimize Ceiling Reflections

The invention applies different surface properties to different regions of the projection screen. The surface layer is designed with light-transmitting protrusions that have specific geometric features (gradually narrowing or expanding portions) to create localized light diffusion effects, while other regions maintain their original reflective properties. This local differentiation allows the screen to simultaneously achieve brightness and eliminate ceiling reflections.

The invention converts the harmful specular reflection into beneficial light diffusion. By designing the surface layer with light-transmitting protrusions that have gradually narrowing or expanding portions, the screen transforms the direct reflected light into diffusely scattered light, thereby eliminating ceiling reflection images while maintaining or even improving the overall display quality.

The surface layer is segmented into multiple light-transmitting protrusions, each with specific geometric features. This segmentation allows the complex light diffusion function to be distributed across multiple simple structural elements, making the overall design more manageable and manufacturable while achieving the desired viewing angle expansion.

The light-transmitting protrusions incorporate curved surfaces (gradually narrowing or expanding portions) instead of flat or angular geometries. These curved surfaces naturally diffuse light in multiple directions, expanding viewing angles without requiring complex multi-component structures. The curvature itself performs the light diffusion function efficiently.