Patent ID: 6538625
Filing Date: 2003-03-25
Classification: G02B,G09G

Abstract:
A scanning display apparatus, comprising:an image signal source operative to produce an image signal, in which the image signal corresponds to an image, the image comprising pixels; a light emitter coupled to the image signal source and responsive to the image signal to emit light; a lens which receives light from the light emitter and which passes exiting light, the exiting light having a focal distance; a controller which alters the index of refraction of lens to alter the focal distance of the exiting light; memory which stores an aberration map, the aberration map comprising predetermined correction data representing a desired amount of variation in focal length of the lens for a corresponding pixel of the image; and wherein the controller alters the focal length of the lens to correct for an aberration at a given pixel according to a corresponding value retrieved from the aberration map.