Current sensing in vacuum electron devices
AssigneeInternational Business Machines Corporation
InventorsJohn Beeteson, Andrew Ramsay Knox
Life of this patent
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Abstract
A vacuum electron device comprises an evacuated envelope containing a cathode for supplying electrons to form an electron beam, an anode spaced from the cathode for receiving the electron beam, and a sensor electrode located between the cathode and the anode.
Claims10
A cathode ray tube display comprising a vacuum electron device having an evacuated envelope containing a cathode device for supplying electrons to form an electron beam current, an anode device spaced from the cathode device for receiving the electron beam current, said current directed towards said anode device through said evacuated envelope, and a sensor electrode located between the cathode and the anode and extending into a path of the electron beam current, wherein electrons of said electron beam current strike said sensor electrode for directly sensing said electron beam current.
A field emission display comprising a vacuum electron device having an evacuated envelope including a cathode device for supplying electrons to form an electron beam current, an anode device spaced from the cathode device for receiving the electron beam current, said current directed towards said anode device through said evacuated envelope, and a sensor electrode located between the cathode and the anode and extending into path of the electron beam current, wherein electrons of said electron beam current strike said sensor electrode for directly sensing said electron beam current.
A magnetic matrix display comprising a vacuum electron device having an evacuated envelope including a cathode device for supplying electrons to form an electron beam current, an anode device spaced from the cathode device for receiving the electron beam current, said current directed towards said anode device through said evacuated envelope, and a sensor electrode located between the cathode and the anode and extending into a oath of the electron beam current, wherein electrons of said electron beam current strike said sensor electrode for directly sensing said electron beam current.
A vacuum electron device comprising an evacuated envelope including a cathode device for supplying electrons to form an electron beam current, an anode device spaced from the cathode device for receiving the electron beam current, said current directed towards said anode device through said evacuated envelope, and a sensor electrode located between the cathode and the anode and extending into a path of the electron beam current, wherein electrons of said electron beam current strike said sensor electrode for directly sensing said electron beam current.
Dependencies are inferred from the claim text.