$Compensation for refraction effects in an autostereoscopic display$

Compensation for refraction effects in an autostereoscopic display

A display enabling multiple views for the purpose of autostereoscopic viewing includes a spatial light modulator (SLM) and a parallax barrier. Additional means to compensate for refraction effects occurring at a refractive boundary of the screen are included. Such refraction at the periphery of a di...

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Bibliographische Detailangaben
Hauptverfasser:	DAVID MONTGOMERY, ROBERT WINLOW, JONATHAN MATHER, GRANT BOURHILL
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	A display enabling multiple views for the purpose of autostereoscopic viewing includes a spatial light modulator (SLM) and a parallax barrier. Additional means to compensate for refraction effects occurring at a refractive boundary of the screen are included. Such refraction at the periphery of a display leads to inaccurate alignment of the optimum viewing fields, known as crosstalk. Various compensation means are suggested to counter this effect to improve the viewer's perception of the display. Embodiments of the compensation means include variation (ie deliberate non-uniformity) in pitch and slit width of the parallax barrier, variation in the pixel positions of the SLM and provision of a transparent layer exhibiting a variation of refractive index, such that the refractive index at regions at the periphery of the display is lower than that at its centre.