Head-mounted display system

Abstract

A head mounted display system including a high resolution active matrix display which reduces center of gravity offset in a compact design. The active matrix display can be either a liquid crystal display or a light emitting display.

1 . A method of determining the direction in which an eye of a viewer is looking comprising: 
 a) forming an image on a viewing screen for viewing by the eye of a viewer by projecting light from a display onto said screen; and    b) detecting light reflected from the eye of the viewer, the light emanating from the display and reflected by the eye along an optical path.    
     
     
         2 . The method of  claim 1  wherein the viewing screen comprises a visor through which the viewer can see an external scene and the image is superimposed upon the viewing screen.  
     
     
         3 . The method of  claim 1  wherein the image comprises a cursor and the image is projected at a predetermined frequency and further comprising the steps of filtering frequencies other than the projected image frequency for viewing on the viewing screen.  
     
     
         4 . The method of  claim 2  further comprising the steps of polarizing the projected light in one plane and polarizing the light from the external scene in an opposite plane.  
     
     
         5 . The method of  claim 1  further comprising determining the direction of the eye by sensing which detectors detect the reflected light.  
     
     
         6 . The method of  claim 5  wherein the image comprises a cursor and the image is projected at a predetermined frequency and further comprising the steps of filtering frequencies other than the projected image frequency for viewing by the viewer.  
     
     
         7 . The method of  claim 6  further comprising the steps of polarizing the projected light in one plane and polarizing the light from an external scene in a opposite plane.  
     
     
         8 . The method of  claim 1  for revising said image in response to eye position determinations comprising the steps of: 
 a) projecting said image for viewing by the eye using a display comprising an array of pixels;  
 b) providing an array of photodetectors with each photodetector aligned with a respective pixel, and converting light from the pixles reflected by the eye into a electrical signal indicative of line-of-sight position; and  
 c) generating signal for revising said image.