Directional backlight with reduced crosstalk

Abstract

A backlight suitable for use in an autostereoscopic display includes a light guide and a first and second light source assembly. The light guide has opposed first and second major surfaces, and opposed first and second side surfaces. The first and second light source assemblies are disposed to inject visible light into the light guide through the first and second side surfaces, respectively. Substantially all of the first side surface highly transmits a second light portion out of the light guide into air, the second light portion originating from the second light source assembly, and substantially all of the second side surface highly transmits a first light portion in a corresponding fashion.; One or more first non-emitting surfaces of the first light source assembly are disposed at least partially between two light-emitting surfaces of the first light source assembly, and are adapted to substantially absorb visible light to reduce crosstalk.

Description

technical field [0001] The present invention relates generally to backlit displays, with particular application to such displays and backlights that provide distinct left and right eye images to allow stereoscopic viewing. The invention also relates to related articles, systems and methods. Background technique [0002] Stereoscopic displays typically present the viewer with images with parallax from separate right and left eye viewpoints. There are several techniques to provide parallax images to both eyes of the viewer. In the first common stereoscopic viewing technique, the viewer utilizes a pair of shutters or 3D glasses that display alternating left / right images in synchronization that either transmit or block the light seen by the viewer. In the second technique, right-eye and left-eye images are displayed alternately and directed toward the viewer's corresponding eye, but without the use of 3D glasses. This second technique, known as autostereoscopic, facilitates s...

AI Technical Summary

Problems solved by technology

Furthermore, if the left and right sources alternately illuminate the directional backlight structure that extracts light depending on the light source end when the right eye image light input surface is opposite the left eye image light input surface, light entering either surface can then be reflected away opposing surfaces and create visual confusion between the left-eye image and the right-eye image, that is, this reflected light can create crosstalk (unnecessary overlap or interference) between the left-eye image and the right-eye image, resulting in 3D image quality degradation

Images