Sharp Kabushiki Kaisha Corporation

Adrian Marc Jacobs

Graham John Woodgate

Jonathan Harrold

David Ezra

Richard Robert Moseley

Nathan James Smith

Emma Jayne Walton

Allan Evans

Thomas Mathew Wynne-Powell

Gregory Gay

Alistair Paul Curd

A multiple depth display provided for displaying images at different depths comprises a single display device (), for displaying all of the images. An optical system () is disposed in front of the display device (). The optical system comprises first and second spaced-apart partial reflectors () and polarization optics () for providing first and second light paths for first and second images or sequences of images displayed by the device (). The first light path () comprises partial transmission through the first reflector (), partial reflection from the second reflector (), partial reflection from the first reflector (), and partial transmission through the second reflector () towards a viewing region.

Display, instrument panel, optical system and optical instrument

A passive polarisation modulating optical element comprises a layer of birefringent material. The layer has substantially fixed birefringence and comprises retarder regions forming a regular pattern, for instance to act as a parallax barrier for a 3D display. The retarders have optic axes aligned in different directions from each other. The element may be associated with a polariser, for instance an output polariser of a liquid crystal device, with the polarising direction of the polariser being parallel to the optic axis of the retarders. Thus, the retarders have no effect on the intensity of light passing through the element whereas the retarders act as half waveplates and rotate the polarisation vector of light passing therethrough, for instance by 90.degree..

Passive polarisation modulating optical element and method of making

A parallax barrier includes a polarisation modifying layer having aperture regions, for supplying light of a second polarisation when receiving light of a first polarisation, separated by barrier regions, for supplying light of a third polarisation different from the second polarisation when receiving light of the first polarisation, and a polariser selectively operable in a first mode and a second mode. At least one of the aperture regions and the barrier regions alters the polarisation of light passing therethrough. The polariser passes light of the second polarisation and blocks light of the third polarisation in the first mode and passes light of the third polarisation in the second mode.

Parallax barrier, display, passive polarisation modulating optical

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Headington, United Kingdom

Adrian Marc Jacobs