Dual-eyebox Head-up Display

Regardless of the designs, the present optical designs for head-up display (HUD) focus mainly on the optical path structure, which results in large and far virtual images, and a reduction in size. However, after optical amplification, the display range and size will be limited and reduced that limits the driver's vision to a specific area. In order to solve the problems of the existing structure, this study uses imaging design as the development target and applies the capability of optical simulation design to perform ray tracing simulation. By doing so, this can solve the aberration problem caused by the limitations of the off-axis and space configurations. The specially designed laminated combiner allows the optical system to achieve the effect of multiple display ranges. The output specifications are two eyeboxes with dimensions of 90×120mm, a virtual image distance of 2,000mm, a magnification factor of about 4x, and a maximum distortion value not exceeding 5%.