Browse Prior Art Database

Suppression of Airborne Radioactivity Gettering on VDY Screens by Use of a Grounded Conducting Coating

IP.com Disclosure Number: IPCOM000122098D
Original Publication Date: 1991-Oct-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Related People

Zabel, TH: AUTHOR [+2]

Abstract

Disclosed is a method for eliminating the buildup of charged airborne radioactivity on Video Display Terminal (VDT) and Television (TV) screens by providing a drainage path to ground for the electrostatic charge on the screen surface.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Suppression of Airborne Radioactivity Gettering on VDY Screens by
Use of a Grounded Conducting Coating

      Disclosed  is  a  method  for  eliminating the buildup of
charged airborne radioactivity on Video Display Terminal (VDT) and
Television (TV) screens by providing a drainage path to ground for
the electrostatic charge on the screen surface.

      Radioactive Radon daughters are deposited on VDT and TV screens
due to their residual negatively charged surfaces when the screen
power is off (see F.  P.  Ziemba, "An Electrostatic Attraction,"
NATURE, Vol. 349, No. 6311, 659-660 (February 21, 1991).)

      We have experimentally determined that the phenomenon is
eliminated  by making VDT and TV screens with a grounded conductive
transparent layer.   The technology to do this currently exists, for
the purpose of minimizing electromagnetic radiation from VDTs.

      Such a layer may be made in various ways, such as chemical
deposition, etching or ion implantation.  External hardness may be
increased by sputtering a protective layer of Quartz over the
conductive layer, but materials, such as InSnO, are themselves
extremely hard,  transparent, and conductive.

      Existing VDTs and TVs could be retrofitted to have conducting
screens by using an adhesive grounded transparent conducting foil.

      Disclosed anonymously.