Chris: Your comment about metallic coatings on display windows not being useful for RF shielding made me sit straight up (from my usual scrolling the email slouch).
You probably know that there are several vendors who market metallic coated plastics for display windows and certainly imply, if not downright claim, EMC shielding properties. I recall seeing dB shielding figures at RF given in the data sheets. I recommended them for use in my previous position (yes, me too) but did not get to see the results of the implementation. I'd like to hear from the others on the list what experiences they may have had with using the plastic shielding windows compared to the embedded metallic mesh variety. Regards, Jack Jacob Z. Schanker, P.E. 65 Crandon Way Rochester, NY 14618 Phone: 716 442 3909 Fax: 716 442 2182 [email protected] ----- Original Message ----- From: Chris Maxwell <[email protected]> To: <[email protected]>; <[email protected]>; <[email protected]> Sent: Friday, June 29, 2001 10:01 AM Subject: RE: LCD Monitors etc. > > I have had similar experience. Not experimenting with LCD's themselves, but > testing products with LCD's. Most of the ones that I have experience with > have a metal back plate. It seems that it's important to bond this plate > peripherally to your casework shielding. That keeps the circuits behind the > display from radiating around it. It doesn't seem as though the displays > themselves (in my limited experience) cause much trouble at all, even with > Class B stuff. > > We once experimented with ITO (Indium Tin Oxide) coatings on the display > window to see if it would lower emissions. It didn't, but it did increase > cost. We bagged it. As a side comment, it seems like ITO is conductive > enough for static dissipation, but not for shielding. So, if you ever did > need to shield an LCD, you would probably be limited to windows that use > metallic mesh sandwiches. > > Chris Maxwell > Design Engineer - > NetTest Optical Division > email [email protected] > phone +1 315 266 5128 > fax +1 315 797 8024 > NetTest > 6 Rhoads Drive, > Utica, NY 13502 USA > web www.nettest.com > > > > -----Original Message----- > > From: [email protected] [SMTP:[email protected]] > > Sent: Friday, June 29, 2001 7:02 AM > > To: [email protected]; [email protected] > > Subject: Re: LCD Monitors etc. > > > > > > George, > > > > I did a number of experiments on 15" monitors for a machine HMI. They are > > indeed quiet, but there is quite a difference between manufacturers..... > > > > Most of the problems I had to fix were related to leakage through the > > display > > from circuitry behind it. > > > > Derek. > > > > ------------------------------------------- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > > > To cancel your subscription, send mail to: > > [email protected] > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Michael Garretson: [email protected] > > Dave Heald [email protected] > > > > For policy questions, send mail to: > > Richard Nute: [email protected] > > Jim Bacher: [email protected] > > > > All emc-pstc postings are archived and searchable on the web at: > > http://www.rcic.com/ click on "Virtual Conference Hall," > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
