Dot-sequential color display system

Abstract

A color display system includes a color light separator that separates incident white illumination light into red, green and blue wavelength bands to be directed to distinct color component sub-pixels (sometimes called dots) that are arranged in a dot-matrix, color triad arrangement (e.g., stripe or delta) to form individual picture elements (pixels) on a pixelated electronic image device (e.g., LCD of DMD). The entire picture is optically shifted from one set of color component sub-pixels to another in a 3-field sequence. As a result, the sets of red, green and blue color component sub-pixels appear to an observer as a single full-color image, thereby providing a dot sequential color display.

1 . A projection display system, comprising: 
 a pixilated display device;    an illumination system that directs illumination light to the pixelated display device for display information to be imparted on the illumination light;    a wobbling device that shifts in synchronism with directing of the illumination light to the pixilating display device to form at least two interlaced arrays of pixels; and    a projection lens assembly that receives the illumination light and projects the light.    
   
   
       2 . The projection display system of  claim 1  further comprising a display screen, wherein the projection lens assembly projects the light toward the display screen to form the interlaced arrays of pixels at the display screen.  
   
   
       3 . The projection display system of  claim 2  in which the wobbling device is positioned between the pixilated display device and the display screen.  
   
   
       4 . The projection display system of  claim 1  in which the projection lens assembly further including a lens positioned along a path of the light after the wobbling device.  
   
   
       5 . The projection display system of  claim 1  in which the pixilated display device is a digital micromirror device (DMD).  
   
   
       6 . The projection display system of  claim 1  in which the wobbling device comprises a movable plate.  
   
   
       7 . The projection display system of  claim 1  in which the wobbling device comprises a liquid crystal switch and birefringent crystal.  
   
   
       8 . The projection display system of  claim 1  in which the wobbling device comprises piezoelectric actuators positioned between symmetric prism arrays.  
   
   
       9 . The projection display system of  claim 1  in which the wobbling device comprises a solenoid or piezos configured to tilt a plate.  
   
   
       10 . The projection display system of  claim 1  in which the system is configured as a dot sequential color display.  
   
   
       11 . A system for color display, comprising: 
 an illumination system that provides illumination light;    a pixilated electronic display panel that receives the illumination light and imparts display imparts display information on the illumination light;    a post-display panel dynamic displacement element that is configured and arranged to repeatedly displace the illumination light through a sequence of positions during each image frame.    
   
   
       12 . The system of  claim 11  further comprising an angular color separation system for providing color separation of incident multi-color illumination light.  
   
   
       13 . The system of  claim 11  further comprising a grating positioned between the illumination system and the pixilated electronic display panel.  
   
   
       14 . The system of  claim 11  further comprising a microlens positioned adjacent to the pixilated electronic display panel.  
   
   
       15 . A liquid crystal display projector configure to display a color image, comprising: 
 an illumination system that provides fixed, color-separated illumination light;    a pixilated electronic display panel arranged and configured to receive the illumination light;    a displacement element configured to displace alignment of the illumination light; and    a projection lens assembly that receives the illumination light and project the light.    
   
   
       16 . The projector of  claim 12  in which the displacement element dynamically moves to repeatedly displace alignment of the illumination light through a sequence of positions.  
   
   
       17 . A method for color display, comprising: 
 providing illumination light from an illumination light source to a pixellated electronic display panel;    imparting display information on the illumination light with the display panel;    dynamically aligning sub-components of the illumination light during each image frame; and    projecting the dynamically aligned sub-components onto a display screen as a color display.    
   
   
       18 . The method of  claim 17  in which dynamically aligning the sub-components includes successively directing the illumination light along different optical paths.