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AssigneeThomson Licensing S. A.
InventorsAlan Weir Bucher, Edward Richard Garrity, Jr., Donald Walter Bartch, James Francis Edwards
Estimating the term…
The present invention provides a focus mask and frame assembly for a cathode ray tube. The cathode ray tube includes an evacuated envelope enclosing a luminescent screen, a focus mask, and a support frame having at least two long sides for supporting the focus mask between the electron gun and the screen within the cathode ray tube. The focus mask has an active array area formed of a plurality of strands and cross wires separated by an insulating material and defining a plurality of focusing apertures within the array area. A border is attached to the strands opposite the insulating material along the upper and lower outer edges of the active array area. The borders extend into the active array area such that the cross wires overlie a portion of the borders and the borders form focusing apertures with the strands along the upper and lower edges of the array.
A cathode ray tube having a focus mask and support frame assembly mounted within the tube between an electron gun and luminescent screen, comprising:
A cathode ray tube including an evacuated envelope enclosing a luminescent screen, a focus mask suspended in register with the screen by a support frame and having an electron gun side, and a pair of opposed support blades which are parallel to a major axis of the screen and connected to opposed long sides of the frame, comprising:
Dependencies are inferred from the claim text.