Matrix Controlled Display Device. Phase II

摘要

The report describes progress to develop a matrix display with 2000 x 2000 discrete elements on a 10 x 10 foot screen by using in-air thermoplastic recording and TIRP (Total Internal Projection Prism) projection techniques. A feasibility model was constructed which provides a 25 x 25 elemental portion of the full-scale display by the optical readout of deformations on a thin film of thermoplastic. Information is recorded on the thermoplastic by the coincident switching of crossed-grid electrodes on 2-mil centers. Tests show that the in-air recording process inherently provides a non-linearity at each non-addressed cell to prevent its partial excitation when addressed cells are written. The present recording resolution of 500 elements per linear inch provides information storage at a density of 250,000 discrete elements per square inch. At ambient, the information is permanently stored. Storage time decreases with increasing thermoplastic temperature to under a second at 100C. Fabrication of a 2000 x 2000 matrix for the full-scale display was initiated. Initial results using KPR as an evaporation resist to directly form the indium oxide electrodes indicate that a 2000 x 2000 matrix with very few, if any, defects can be fabricated. (Author)