Vehicle Head-Up Display Optical System with Folded Mirror Path

The patent employs multiple reflection mirrors (first reflection mirror, second reflection mirror, third reflection mirror) to fold the optical path, transforming the linear distance requirement into a multi-dimensional spatial arrangement. This allows the light to travel a longer effective distance through repeated reflections between mirrors and between the display panel and lens, achieving the required image depth without increasing the overall device volume.

The optical path is segmented into multiple discrete reflection segments using separate mirrors positioned at different locations. Each mirror creates a distinct reflection segment that contributes to the total optical path length. This segmentation allows the system to accumulate the required effective distance through multiple smaller reflection steps rather than requiring a single large distance.

The patent uses multiple reflection mirrors arranged in a folded configuration to extend the optical path length in three-dimensional space. The light travels through multiple reflection segments created by the first, second, and third reflection mirrors, effectively increasing the depth of the drive information image while keeping the physical footprint within the instrument panel constraints.

The optical components are nested within the instrument panel structure, with reflection mirrors positioned to create compact folded paths. The multiple reflection segments are arranged to fit within the available space, allowing the system to achieve extended optical path length without exceeding the stationary object dimensions of the instrument panel housing.