Scanning backlight with slatless light guide

A technology of backlight and light source, applied in the direction of plane/plate light guide, light guide, light guide of lighting system, etc., can solve problems such as image crosstalk

Inactive Publication Date: 2013-04-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the backlight is uniformly modulated between the left-eye and right-eye transmit beams across the output area of ​​the backlight, crosstalk may occur in some parts of the image

Method used

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  • Scanning backlight with slatless light guide
  • Scanning backlight with slatless light guide
  • Scanning backlight with slatless light guide

Examples

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example

[0058] Construct similar to Figure 3b The scanning backlight is shown. The light guide was slatless, constructed of unit cast acrylic, and had a length of about 260 mm, a width of about 123 mm, and a thickness of about 3.2 mm. On the two opposite short sides of the light guide (sides with a dimension of 123mm) place a light source assembly with eight partially collimated light sources similar to a combined Image 6 and Figure 7a Examples shown and described. One light source assembly produces a right eye beam and the other light source assembly produces a left eye beam. All sixteen light sources are individually addressable so that any light source or combination of light sources can be energized as required. The base of the light source assembly (see Image 6 Item 609 in ) is a machined one-piece aluminum base with a nominal parabolic surface for each light source (see Image 6 item 614 in ). Parabolic surfaces usually fit the equation y=(0.25)*x 2 , where x and y a...

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Abstract

A backlight includes a light guide and a first and second light source adapted for independent operation and arranged to inject a first and second light beam, respectively, into the light guide through different portions of the light injection surface. Each light source includes a lamp and a concave reflector to partially collimate light from the lamp. One major surface of the light guide includes prismatic structures that are parallel to a first axis. Another major surface of the light guide includes lenticular structures that are parallel to each other but perpendicular to the prismatic structures. The lenticular structures limit spatial spreading for light that remains in the light guide.; Each light source cooperates with the light guide to provide light that is substantially laterally confined to a transverse band of the light guide, even though the light guide contains no gaps that define slats to accomplish such confinement.

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 a viewer in order to create a stereoscopic viewing experience. In the first technique, the viewer uses a pair of shutter or three-dimensional ("3D") glasses that alternate left / right image displays while transmitting or blocking light from the viewer's view. In the second technique, right- and left-eye images are displayed alternately and directed toward the viewer's corresponding eye, but 3D glasses are not used. This second technique, known as autostereoscopic, fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02B27/22G02F1/1333G02B30/27
CPCG02B6/0028G02B6/0031G02B6/0038G02B6/0068G02B6/0091H04N13/32G02B30/27G02F1/1335
Inventor 埃里克·A·阿霍约翰·C·舒尔茨
Owner 3M INNOVATIVE PROPERTIES CO
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