Picture display device having an improved bandwidth
AssigneeU.S. Philips Corporation
InventorsTom Van Zutphen, Jacobus Stoffels
Life of this patent
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Abstract
A picture display device having a cathode which includes two electric current conductors between which a video signal is applied, for applying a video signal to the cathode to modulate an electron beam emitted from the cathode. To increase the feasible modulation frequency, the inductance of the two electric conductors is reduced by holding one part of the length of the conductors closer together than their spacing over another part of the same length.
Claims20
A picture display device including a cathode ray tube comprising a base, and an electron gun and a cathode for emitting an electron beam,
- said base comprising means for connecting to external electronics, and
- said cathode comprising two electric current conductors between which a video signal is applied, said conductors being respectively connected to said means for connecting, for applying a video signal to said cathode to modulate said electron beam,
- characterized in that the device comprises means for reducing inductance of said electric current conductors, and
- said means for reducing comprises an arrangement of said conductors such that over a part of the length of said conductors the conductors are held closer to each other than over another part of the length, and are separated by an insulating material.
A cathode ray tube comprising a base, and an electron gun and a cathode for emitting an electron beam,
- said base comprising means for connecting to external electronics, and
- said cathode comprising two electric current conductors between which a video signal is applied, said conductors being respectively connected to said means for connecting, for applying a video signal to said cathode to modulate said electron beam,
- characterized in that the device comprises means for reducing inductance of said electric current conductors, and
- said means for reducing comprises an arrangement of said conductors such that over a part of the length of said conductors the conductors are held closer to each other than over another part of the length, and are separated by an insulating material.
Dependencies are inferred from the claim text.