EMI filter for plasma display panel

US8298678B2 · kind B2 · utility

Assignees

• Guardian Industries Corp. · US
• Centre Luxembourgeois de Recherches pour le Verre et la Ceramique S.A. (C.R.V.C.) · LU

Inventors

• Philip J. Lingle · Temperance, US
• Anton Dietrich · Fontnas, CH
• Yiwei Lu · Ann Arbor, US
• Willem den Boer · Milpitas, US
• John A. VanderPloeg · Zeeland, US
• Yei-Ping (Mimi) H. Wang · Troy, US

Key dates

• Filing date: Mar 24, 2011
• Grant date: Oct 30, 2012
• Expiry date: Jun 23, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2495
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A plasma display panel (PDP) includes an EMI filter at a front portion thereof for blocking/shielding substantial amounts of electromagnetic waves. The filters has high visible transmission, and is capable of blocking/shielding electromagnetic waves. In certain example embodiments, a silver based coating of the EMI filter reduces damage from EMI radiation through highly conductive Ag layers, blocks significant amounts of NIR and IR radiation from outdoor sunlight to reduce PDP panel temperature, and enhances contrast ratio through reduced reflection, while maintaining high visible transmission. In certain example embodiments, at least one layer of or including silicon nitride may be Si-rich, and/or at least one layer including an oxide of Ni and/or Cr may be a suboxide, in order to improve heat treatability of the coated article.