High contrast projection screen with stray light rejection

摘要

A multi-layer projection screen includes a transparent substrate having first and second sides, a stray light rejection layer, and a lens array. The stray light rejection layer is disposed across the first side of the transparent substrate. The stray light rejection layer includes an array of pillar structures, wherein each pillar structure of the array of pillar structures includes an entrance aperture, an exit aperture, a substantially transparent pathway extending from the entrance aperture to the exit aperture, and an opaque side wall surrounding the transparent pathway. The lens array is disposed across the second side of the transparent substrate and optically aligned to the array of pillar structures. The stray light rejection layer blocks display light received from the lens array having an oblique trajectory that is greater than a threshold angle from a normal of the second side of the transparent substrate.

主权项

1. A multi-layer projection screen, comprising:
a substantially transparent substrate having first and second sides; a stray light rejection layer disposed across the first side of the transparent substrate, the stray light rejection layer including an array of pillar structures, wherein each pillar structure of the array of pillar structures includes:
an entrance aperture;an exit aperture;a substantially transparent pathway extending from the entrance aperture to the exit aperture; andan opaque side wall surrounding the transparent pathway; and a lens array disposed across the second side of the transparent substrate and optically aligned to the array of pillar structures such that each lens of the lens array focuses first display light having a normal trajectory relative to the second side of the transparent substrate through the entrance and exit apertures of a corresponding pillar structure while second display light having an oblique trajectory that is greater than a threshold angle from the normal trajectory is directed onto the opaque side wall and substantially blocked from reaching the exit aperture, wherein the opaque side wall and transparent pathway are formed of materials having substantially similar refractive indexes.