Vehicle HUD Dustproof Cover with Variable Curvature

The dustproof cover employs a variable curvature recessed surface where the curvature radius changes in the front-rear direction. Specifically, the curvature radius is smaller at the front side and larger at the rear side, creating different reflective properties at different locations. This local variation in curvature allows the cover to effectively reflect outer light while reducing the overall depth size compared to a uniform fixed curvature design.

The invention changes the curvature parameter of the recessed surface from a fixed value to a variable value that changes continuously or in steps from front to rear. This parameter change enables the dustproof cover to achieve effective outer light reflection with a reduced depth dimension, as the varying curvature allows for more efficient light redirection toward invisible directions with less depth required.

The variable curvature design allows different regions of the dustproof cover to optimize their reflective function locally. The front portion with smaller curvature radius handles light reflection more efficiently, enabling the rear portion to be more compact. This local optimization across the cover surface allows the system to support larger opening sizes for remote imaging while keeping the overall dustproof cover volume reduced.

By introducing curvature variation in the front-rear dimension, the invention transforms a two-dimensional surface problem into a three-dimensional solution. The variable curvature across the depth dimension enables effective light reflection without proportionally increasing the cover's depth, thus allowing larger opening sizes for remote imaging while controlling the overall volume and installation space requirements.