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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsJun Nishida, Yoshikazu Kawauchi, Hiroshi Miyama, Kaoru Tomii
Estimating the term…
A charged-particle beam electric field deflector includes plural (n) pairs or sets of facing deflection electrodes to accelerate and deflect the beam. Different d.c. acceleration voltages are superimposed on a common deflection voltage and applied to the electrode pairs so that electrode pair k is responsive to acceleration voltage k and the common voltage, where k is selectively each of 1 . . . n. The distance between each pair of facing electrodes is constant or increases along the beam path, while the length of each of the deflection electrodes has a given relationship as a function of the distance between the facing electrodes of each pair. The deflector is used in a flat CRT.
A charged-particle beam deflector for use in a deflection system for simultaneously uniformly deflecting plural charged-particle beams arranged in line, comprising a plurality of pairs of facing electrodes having planar deflecting surfaces having elongated surfaces in the direction of beam propagation, each of said pairs being at a different location along the propagation direction of each beam, first means for separately applying different d.c. voltages to said plurality of pairs of facing electrodes for providing focusing forces between the electrodes of each electrode pair so that different focusing forces are applied between the electrodes of each electrode pair, and second means for applying an a.c. deflection voltage having the same amplitude to all of said pairs in common so that the same deflecting force is applied to the electrodes of each electrode pair, adjacent electrode pairs being spaced and insulated from each other so that a condenser lens electric field subsists between them.
A flat CRT comprising:
A flat CRT comprising:
In combination, a charged-particle beam source, a target for the beam, means between the source and target for deflecting the beam, the target being positioned at right angles to the direction of beam propagation through the deflecting means while the beam is not deflected by the deflecting means, the deflecting means including n pairs of deflecting electrodes having opposed planar surfaces such that the electrodes of each pair are at a different position along the direction of beam propagation, where n is an integer greater than one, the planar surfaces of each of the deflecting electrodes having a length in the direction of beam propagation considerably greater than the distance between adjacent pairs of said electrodes, means for applying monotonically changing d.c. voltages to the electrodes of each pair as a function of distance between the source and target, and means for simultaneously applying the same deflection voltage across the electrodes of all n pairs of said electrodes.
Dependencies are inferred from the claim text.