Sharp Kabushiki Kaisha Corporation

Jason Kempton Slack

Duncan James Anderson

Michael Geraint Robinson

Graham John Woodgate

Nicholas Mayhew

Marina Vladimirovna Khazova

Haruhisa Takiguchi

Emma Jayne Walton

Craig Tombling

Grant Bourhill

Robert George Brown

Kazuhiro Inoko

Masaharu Hara

Keisuke Mitani

Karen Emma Todd

Tamotsu Takatsuka

Polarization separation element, a polarization conversion system, an optical element, and a projection display system

An optical device which is suitable for use in a projection display comprises a spatial light modulator, such as a liquid crystal device, with a microlens array disposed on its front surface. The microlenses are of convergent type, such as lenticules. The spatial light modulator is of the reflective type and comprises a plurality of rear reflectors, each of which has convergent optical power in at least one direction. The reflectors are arranged such that, for a given direction of illumination, each reflector forms an image of the aperture A of a microlens on the aperture B of another microlens or at a different position on the same microlens. When used in, for example, a projection display, light losses caused by vignetting are reduced.

Optical device and projection display

A Liquid crystal device includes: first and second substrates; a layer of liquid crystal disposed between the first and second substrates: and a plurality of picture elements. Each of the picture elements includes: a first electrode disposed on the first substrate; a second electrode electrically insulated from and disposed above the first electrode relative to the substrates; and a third electrode disposed on the second substrate.

Liquid crystal device in which an electric field within the picture element varies in intensity

A liquid crystal projector comprises a light source (,), a first lenslet array (,) comprising a plurality of first lenslets (,), a second lenslet array (,) comprising a plurality of second lenslets (,) and being con-focal with said first lenslet array (,), and at least one liquid crystal panel (,), wherein said first and second lenslet arrays (,) are non-identical.

Liquid crystal projectors

A dark field projection display includes a light source, a spatial light modulator, and an optical system for directing light from the light source onto the spatial light modulator. The optical system includes a plurality of optical subsystems and a plurality of reflectors. Each of the optical subsystems has an input aperture and is arranged to image light from the light source, the subsystems forming a spatial distribution of source images whose relative positions are different from the relative positions of the input apertures. Each of the optical subsystems further includes a plurality of reflectors disposed at the relative positions of the source images. Each of the reflectors is arranged to reflect light from a respective one of the subsystems onto the spatial light modulator.

Dark field projection display

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Cambridge, United Kingdom

Jason Kempton Slack