Multi-view backlight, mode-switchable multi-view backlight, and 2D / 3D mode-switchable display

摘要

Multi-view backlights and mode-switchable backlights use a planar backlight for emitting scattered light and a light-blocking layer having a plurality of openings for providing a plurality of directional light beams from the scattered light. The mode-switchable backlight further comprises another planar backlight configured to provide diffuse light in a two-dimensional (2D) mode of operation, wherein the plurality of directional light beams are provided in a three-dimensional mode. do. The 2D / 3D mode switchable display device includes the mode switchable backlight and a light valve arrangement. A method of operating a backlight device includes directing scattered light from a planar backlight to a light-blocking layer having a plurality of openings and providing a plurality of directional light beams using an opening of the plurality of openings.