Raster graphic helmet mountable display

Abstract

A helmet mountable display includes electronic apparatus for ultimately providing sweep lines of a full color raster graphic image and electromechanical apparatus for disposing the sweep lines to appear at their proper spatial position at the image. The electronic apparatus may include a cathode ray tube having a strip of red, green and blue emitting phosphor, and either one electron gun for sequentially scanning a trace in each strip or three electron guns for parallel scanning in response to respective color video information. The three traces are superimposed and registered, such as by color information delay apparatus, a focusing optical system or a combination thereof, to form a sweep line so that the sweep line exhibits full color characteristics which form a portion of the image. The shape of the electron beam that forms the traces in the strips may be elongated transverse the direction of the sweep and later compressed, such as by a cylindrical lens, for allowing a higher intensity or increased brightness trace to form the image without exceeding the peak energy handling capability of the phosphors.

Dependencies are inferred from the claim text.