Waldo R Robinson

US Patent:

54733405, Dec 5, 1995

Filed:

Sep 27, 1990

Appl. No.:

7/588890

Inventors:

Parviz Soltan - San Diego CA
Thomas Phillips - San Diego CA
Waldo R. Robinson - San Diego CA
John Marez - San Diego CA
Randy Wyatt - Lake Forest CA
Margie M. Nicholson - San Marino CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G09G 338

US Classification:

340105

Abstract:

An apparatus for displaying a multi-color pattern within a single device is shown and described. The apparatus utilizes an electrochromic light valve which comprises electrodes that cover a photoconductive layer and a two-dimensional plurality of electrochromic pixels. An insulating grid defines the electrochromic pixels in the multi-color display. Each electrochromic pixel has a conductive mirror onto which the electrochromic material is deposited. The electrochromic material and grid structure are covered by an electrolyte solution. Color selection for a given pixel is effected by applying a voltage pulse of controlled amplitude synchronized with a laser beam which illuminates the photoconductor associated with the addressed electrochromic pixel. The voltage applied when the laser beam addresses an electrochromic pixel determines the color of the pixel.