A HIGH-RESOLUTION, FULL-COLOR, HEAD MOUNTED FERROELECTRIC LIQUID CRYSTAL-OVER-SILICON DISPLAY

The development of a compact, head mounted display based on ferroelect ric liquid crystal-over-submicron CMOS technology is described. The re flective display has an array of 1024x768 DRAM pixels with aperture ra tios of similar to 55% (being upgraded to 75%) and covers an area of 1 2.3mm x 9.2mm providing a resolution of >2000 lines per inch. Colour i mages are created using time sequential illumination of binary images displayed on the array of DRAM pixels with light from red (660nm), gre en (525nm) and blue (470nm) pulsed LEDs. The images are projected into the eye over a field of view of 40 degrees diagonal with less than 4% geometrial distortion. Pictures are presented of XGA images with thre e red, three green, and two blue bit-frames at a frame rate of 1.2KHz (upgrade 2.5KHz) giving 256 colour hues with full 1024x768 pixel resol ution in each colour (upgrade 2(16) hues).