Contrast enhancement filter glass for color CRT displays
AssigneeSchott Glass Technologies, Inc.
InventorsLee M. Cook, Alexander J. Marker, III
Life of this patent
Estimating the term…
Abstract
A colored glass suitable for enhancing contrast of color CRT displays consists essentially of, in weight %: ______________________________________ SiO.sub.2 40-60% B.sub.2 O.sub.3 0-6% Al.sub.2 O.sub.3 0-2% Sum Li.sub.2 O + Na.sub.2 O + K.sub.2 O 24-30% Sum MgO + CaO + SrO + BaO + ZnO 0-10% TiO.sub.2 1-3% CeO.sub.2 1-3% Nd.sub.2 O.sub.3 10-25% Er.sub.2 O.sub.3 1-5% Sm.sub.2 O.sub.3 0-3% Sum Er.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 1-8% CuO 0.1-0.5% MnO.sub.2 0.1-1.0%. ______________________________________
Claims17
A glass consisting essentially of, in weight %:
- ______________________________________ SiO.sub.2 40-60% B.sub.2 O.sub.3 0-6% Al.sub.2 O.sub.3 0-2% Sum Li.sub.2 O + Na.sub.2 O + K.sub.2 O 24-30% Sum MgO + CaO + SrO + BaO + ZnO 0-10% TiO.sub.2 1-3% CeO.sub.2 1-3% Nd.sub.2 O.sub.3 10-25% Er.sub.2 O.sub.3 1-5% Sm.sub.2 O.sub.3 0-3% Sum Sm.sub.2 O.sub.3 + Er.sub.2 O.sub.3 1-8% CuO 0.1-0.5% MnO.sub.2 0.1-0.8%. ______________________________________
A glass consisting essentially of, in weight %:
- ______________________________________ SiO.sub.2 40-60% B.sub.2 O.sub.3 0-6% Al.sub.2 O.sub.3 0-2% Sum Li.sub.2 O + Na.sub.2 O + K.sub.2 O 24-30% Sum MgO + CaO + SrO + BaO + ZnO 0-10% TiO.sub.2 1-3% CeO.sub.2 1-3% Nd.sub.2 O.sub.3 10-25% Er.sub.2 O.sub.3 1-5% Sm.sub.2 O.sub.3 0-3% Sum Sm.sub.2 O.sub.3 + Er.sub.2 O.sub.3 1-8% CuO 0.1-0.5% MnO.sub.2 0.1-0.8% ______________________________________
- and an effective amount of a colorant oxide.
Dependencies are inferred from the claim text.