Compact edge illuminated diffractive display
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United States of America Patent
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Jul 7, 2015
Issued Date -
N/A
app pub date -
Apr 17, 2012
filing date -
Apr 17, 2012
priority date (Note) -
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Abstract
There is provided a projection display device comprising: a light source, an SBG device comprising a multiplicity of separately SBG elements sandwich between transparent substrate to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises plurality of independently switchable transparent electrodes elements, each electrode element substantially overlaying a unique SBG element. Each SBG element encodes image information to be projected on an image surface. Light coupled into the light guide, undergoes total internal reflection until diffracted out to the light guide by an activated SBG element. The SBG diffracts light out of the light guide to form an image region on an image surface when subjected to an applied voltage via said transparent electrodes.
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International Classification(s)
- H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
- G01J:MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTE....
- H04N:PICTORIAL COMMUNICATION, e.g. TELEVISION
- G02B:OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- G03B:APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS O....
- G03F:PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNE....
- G03H:HOLOGRAPHIC PROCESSES OR APPARATUS
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