Current controlling element
AssigneeNGK Insulators, Ltd.
InventorsYukihisa Takeuchi, Tsutomu Nanataki, Iwao Ohwada
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Abstract
An actuator having a fixed portion, a vibrating portion supported on the fixed portion so as to undergo vibrations, and an actuating portion including a first and a second electrodes formed on both sides or one side of a deformable layer is provided. The actuator generates displacement motion by holding the electric potential of the first electrode at a constant value and variably controlling the electric potential of the second electrode. A cathode for emitting electrons is formed on the actuator. The current controlling element changes the position of the cathode with respect to the plate by the displacement motion of the actuator to control a current value taken out of the plate.
Claims44
A current controlling element comprising:
- an actuator having a fixed portion, a vibrating portion supported on said fixed portion so as to undergo vibrations, and an actuating portion including first and second electrodes formed on at least one side of a deformable layer, said actuator generating a displacement motion by holding an electric potential of said first electrode at a constant value and variable-controlling an electric potential of said second electrode;
- a cathode formed on said actuator for emitting electrons;
- and
- a plate for receiving said electrons emitted from said cathode;
- wherein said current controlling element changes a position of said cathode with respect to said plate by said displacement motion of said actuator to control a current value taken out of said plate.
A current controlling element comprising:
- an actuator having a fixing portion, a vibrating portion supported on said fixed portion so as to undergo vibrations, and an actuating portion including first and second electrodes formed on at least one side of a deformable layer, said actuator generating a displacement motion by holding an electric potential of said first electrode at a constant value and variable-controlling an electric potential of said second electrode;
- a cathode being formed on said actuator and emitting electrons;
- and
- a plate receiving said electrons emitted from said cathode;
- wherein said current controlling element changes a position of said cathode with respect to said plate by said displacement motion of said actuator to control a current value taken out of said plate;
- and said actuator maintains a displacement state by setting the electric potential of said first electrode at a certain value while holding the electric potential of said second electrode at substantially zero.
Dependencies are inferred from the claim text.