Electric potential measuring apparatus, and image forming...

Details Electric potential measuring apparatus, and image forming... Electric potential measuring apparatus, and image forming...

2006-05-23

2006-05-23

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Testing potential in specific environment

Voltage probe

C324S457000

Reexamination Certificate

active

07049804

ABSTRACT:
An electric potential measuring apparatus including a substrate disposed facing a measurement object, a detecting electrode provided insulated from the substrate, and a capacity modulating unit for modulating a coupling capacity between the detecting electrode and the measurement object. In the electric potential measuring apparatus, a region with a dielectric constant less than a dielectric constant of the substrate is formed in the substrate to achieve an increase in resistivity of a portion of the substrate between detecting electrodes, or a decrease in a stray capacity between the detecting electrode and the substrate.

REFERENCES:
patent: 6177800 (2001-01-01), Kubby
patent: 6888442 (2005-05-01), O'Reilly et al.
patent: 2004/0239306 (2004-12-01), Barrault et al.

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