Magnetic field effects on CRT computer monitors

Balazs Banfai, George G. Karady, Charles J. Kim, Kate Brown Maracas

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper discusses the effect of external low frequency magnetic field interference on cathode ray tube (CRT) computer monitors. The paper describes a new test facility and presents a quantitative measuring method which has been developed to characterize the field effects. A total of 21 monitors from major manufacturers were tested. It was found that larger monitors are more sensitive and that the relationship between the magnitude of jitter and the magnetic flux density is linear and independent of the refresh rate and the frequency of the interfering magnetic field. The monitors are most sensitive to magnetic fields parallel to the screen. Monitor sensitivity is specified and presented for the tested monitors. A statistical survey was carried out to determine the human perceptibility level of jitter. It was found that 12 mG may cause detectable jitter for the common 14 inches monitor. This value drops to around 7 mG for a 21 inches monitor.

Original languageEnglish (US)
Pages (from-to)307-312
Number of pages6
JournalIEEE Transactions on Power Delivery
Volume15
Issue number1
DOIs
StatePublished - Jan 2000

Fingerprint

Magnetic field effects
Computer monitors
Cathode ray tubes
Jitter
Magnetic fields
Magnetic flux
Test facilities

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Banfai, B., Karady, G. G., Kim, C. J., & Maracas, K. B. (2000). Magnetic field effects on CRT computer monitors. IEEE Transactions on Power Delivery, 15(1), 307-312. https://doi.org/10.1109/61.847267

Magnetic field effects on CRT computer monitors. / Banfai, Balazs; Karady, George G.; Kim, Charles J.; Maracas, Kate Brown.

In: IEEE Transactions on Power Delivery, Vol. 15, No. 1, 01.2000, p. 307-312.

Research output: Contribution to journalArticle

Banfai, B, Karady, GG, Kim, CJ & Maracas, KB 2000, 'Magnetic field effects on CRT computer monitors', IEEE Transactions on Power Delivery, vol. 15, no. 1, pp. 307-312. https://doi.org/10.1109/61.847267
Banfai, Balazs ; Karady, George G. ; Kim, Charles J. ; Maracas, Kate Brown. / Magnetic field effects on CRT computer monitors. In: IEEE Transactions on Power Delivery. 2000 ; Vol. 15, No. 1. pp. 307-312.
@article{264738df905f4d248c7938f5359aeede,
title = "Magnetic field effects on CRT computer monitors",
abstract = "This paper discusses the effect of external low frequency magnetic field interference on cathode ray tube (CRT) computer monitors. The paper describes a new test facility and presents a quantitative measuring method which has been developed to characterize the field effects. A total of 21 monitors from major manufacturers were tested. It was found that larger monitors are more sensitive and that the relationship between the magnitude of jitter and the magnetic flux density is linear and independent of the refresh rate and the frequency of the interfering magnetic field. The monitors are most sensitive to magnetic fields parallel to the screen. Monitor sensitivity is specified and presented for the tested monitors. A statistical survey was carried out to determine the human perceptibility level of jitter. It was found that 12 mG may cause detectable jitter for the common 14 inches monitor. This value drops to around 7 mG for a 21 inches monitor.",
author = "Balazs Banfai and Karady, {George G.} and Kim, {Charles J.} and Maracas, {Kate Brown}",
year = "2000",
month = "1",
doi = "10.1109/61.847267",
language = "English (US)",
volume = "15",
pages = "307--312",
journal = "IEEE Transactions on Power Delivery",
issn = "0885-8977",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "1",

}

TY - JOUR

T1 - Magnetic field effects on CRT computer monitors

AU - Banfai, Balazs

AU - Karady, George G.

AU - Kim, Charles J.

AU - Maracas, Kate Brown

PY - 2000/1

Y1 - 2000/1

N2 - This paper discusses the effect of external low frequency magnetic field interference on cathode ray tube (CRT) computer monitors. The paper describes a new test facility and presents a quantitative measuring method which has been developed to characterize the field effects. A total of 21 monitors from major manufacturers were tested. It was found that larger monitors are more sensitive and that the relationship between the magnitude of jitter and the magnetic flux density is linear and independent of the refresh rate and the frequency of the interfering magnetic field. The monitors are most sensitive to magnetic fields parallel to the screen. Monitor sensitivity is specified and presented for the tested monitors. A statistical survey was carried out to determine the human perceptibility level of jitter. It was found that 12 mG may cause detectable jitter for the common 14 inches monitor. This value drops to around 7 mG for a 21 inches monitor.

AB - This paper discusses the effect of external low frequency magnetic field interference on cathode ray tube (CRT) computer monitors. The paper describes a new test facility and presents a quantitative measuring method which has been developed to characterize the field effects. A total of 21 monitors from major manufacturers were tested. It was found that larger monitors are more sensitive and that the relationship between the magnitude of jitter and the magnetic flux density is linear and independent of the refresh rate and the frequency of the interfering magnetic field. The monitors are most sensitive to magnetic fields parallel to the screen. Monitor sensitivity is specified and presented for the tested monitors. A statistical survey was carried out to determine the human perceptibility level of jitter. It was found that 12 mG may cause detectable jitter for the common 14 inches monitor. This value drops to around 7 mG for a 21 inches monitor.

UR - http://www.scopus.com/inward/record.url?scp=0033724285&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033724285&partnerID=8YFLogxK

U2 - 10.1109/61.847267

DO - 10.1109/61.847267

M3 - Article

AN - SCOPUS:0033724285

VL - 15

SP - 307

EP - 312

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 1

ER -