Process for producing image patterns in layers comprising electrophotoluminescent materials
Abstract
Abstract A PROCESS FOR PRODUCING IAMGE PATTERNS IN LAYERS COMPRISING ELECTROPHOTOLUMINESCENT MATERIALS. ESSENTIALLY THE PROCESS INVOLVES THE STEPS OF EMPLOYING AN ELECTROLUMINESCENT MATERIAL TO OPTICALLY EXCITE A LAYER COMPRISING AN ELECTROPHOTOLUMINESCENT MATERIAL SO THAT THE ELECTROPHOTOLUMINESCENT MATERIAL EMITS VISIBLE LIGHT. THEREAFTER, THE EXCITATION IS DISCONTINUED BUT THE LAYER COMPRISING THE ELECTROPHOTOLUMINESCENT MATERIAL IS MAINTAINED UNDER AN ELECTRICAL FIELD AND CONTINUES TO EMIT VISIBLE LIGHT. WHILE THE LAYER CONTINUES TO EMIT VISIBLE LIGHT, THE SUBJECT MATTER TO BE REPRODUCED IS PLACED IN JUXTAPOSITION WITH THE LAYER FOR A TIME SUFFICIENT TO PERMIT A SIGNIFICANT IMAGEWISE DIFFERENTIAL IN DECAY OF LUMINESCENCE SO THAT A POSITIVE REPRODUCTION OF THE SUBJECT MATTER IS FORMED IN THE LAYER.
Inventors
- 👤 Edwin H Land
Bibliographic Details
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