Liquid crystal light value in combination with cathode ray tube containing a far-red emitting phosphor
AssigneeHughes Aircraft Company
InventorsEsther Sluzky, Mary A. Lemoine, Kenneth R. Hesse
Life of this patent
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Abstract
A far-red emitting phosphor for cathode ray tubes used in liquid crystal light valves comprises Y.sub.3-y Gd.sub.y Al.sub.5-x Ga.sub.x O.sub.12 :A, where x ranges from 0 to 5, y ranges from 0 to 3, and A is selected from the group consisting of chromium, iron, vanadium, neodymium, dysprosium, cobalt, nickel, titanium or combination thereof.
Claims5
In combination, a liquid crystal light valve including a photosensitive layer consisting essentially of hydrogened amorphous silicon and a cathode ray tube containing a far-red emitting phosphor operatively coupled thereto, characterized in that said phosphor consists essentially of Y.sub.3-y Gd.sub.y Al.sub.5-x Ga.sub.x -O.sub.12 :A, where x has a value within the range of from 0 to 5, y has a value within the range of from 0 to 3, and A is at least one of chromium and neodymium, where chromium has a value within the range of about 0.33 to 2 at% and neodymium has a value of about 1 at%.
Dependencies are inferred from the claim text.