Cathodoluminescent screen for presenting a differential color display and method of forming the same
Abstract
Abstract A CATHODOLUMINESCENT SCREEN FORMED OF A HOMOGENEOUS MIXTURE OF TWO ELECTRON RESPONSIVE PHOSPHORS HAVING DIFFERENT SPECTRAL EMISSIONS. THE SECONDPHOSPHOR, PRESENT IN A GREATER AMOUNT, HAS EACH PARTICLE SURFACE MODIFIED TO PROVIDE A PERIPHERAL ENERGY ABSORBING BARRIER FOR ELECTRON BEAMS UNDER A PREDETERMINED THRESHOLD ENERGY. AN ELECTRON BEAM OF A FIRST ENERGY EXCITES THE FIRST PHOSPHOR, BUT A BEAM OF HIGHER ENERGY IS REQUIRED TO PENETRATE AND EXCITE THE TREATED PHOSPHOR. WHILE THE FIRST PHOSPHOR IS ALSO SIMULTANEOUSLY EXCITED, THE SECOND PHOSPHOR SPECTRAL EMISSION PREDOMINATES THE ADDITIVE MIXTURE OF COLOR EMISSION TO PROVIDE A DIFFERENTIAL COLOR DISPLAY AS THE ENERGY OF THE ELECTRON BEAM IS VARIED.
Inventors
- 👤 Anthony V Gallaro
Bibliographic Details
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