Dual-orientation autostereoscopic backlight and display

摘要

Stereoscopic displays and backlights include a light guide with individually addressable light sources disposed at opposite edges of the light guide, and a light redirecting film disposed in front of the light guide. Light from one light source is emitted from the backlight as a right eye elongated light beam, and light from the opposite light source is emitted as a left eye elongated light beam. Structured surface features, e.g. linear prismatic or linear lenticular features, on the light guide and/or the light redirecting film are oriented such that the elongated light beams are offset from an optical axis of the backlight. Moreover, each of the elongated light beams is oriented to intersect both a first observation plane and a second observation plane perpendicular to the first observation plane, the first observation plane defined by the optical axis and an in-plane axis along which the light sources are disposed.

主权项

1. A backlight suitable for use in an autostereoscopic display, the backlight comprising:
a light guide having first and second side surfaces adapted to receive light from respective first and second light sources, the first and second side surfaces being disposed on opposite ends of a first in-plane axis of the light guide, the light guide also having opposed first and second structured surfaces, the first structured surface comprising lenticular features that each extend parallel to an in-plane lenticular axis, and the second structured surface comprising prismatic features that each extend parallel to an in-plane prismatic axis; and a light redirecting film disposed to receive light from the light guide; wherein the in-plane lenticular axis is not parallel to the first in-plane axis, or the in-plane prismatic axis is not perpendicular to the first in-plane axis, or both.