Patent ID: 6733132
Filing Date: 2004-05-11
Classification: G02B

Abstract:
A display device comprising:a photon source for emitting photons for a source image, the source image comprising a plurality of pixels arranged in a surface; a variable power optical system for modulating wavefront curvature of photons; and a final optical system for directing photons from the variable power optical system into a user's eye so that the user has a perception of each source image pixel at any one of a continuum of distances; characterised in that the device comprises an aperture stop for forming the photons into pencils, each pencil having photons from a single source pixel; the device further comprises a controller comprising means for receiving source image pixel co-ordinate data and intensity data and data representing required perceived pixel distance, and for generating an output control signal for the variable power optical system, and an output control signal for the photon source; and the variable power optical system comprises means for dynamically altering the wavefront curvature of the pencils in response to the control signal.