US 8,298,678 B2Granted

EMI filter for plasma display panel

AssigneesGuardian Industries Corp., Centre Luxembourgeois de Recherches pour le Verre et la Ceramique S.A. (C.R.V.C.)

InventorsPhilip J. Lingle, Anton Dietrich, Yiwei Lu, Willem Den Boer, John A. Vanderploeg, Yei-Ping (Mimi) H. Wang

Life of this patent

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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.

Claims6

Dependent claims

A display device comprising:

a display panel;
an electromagnetic interference (EMI) filter provided at a front portion of the display panel, the EMI filter including an EMI coating supported by a glass substrate, the EMI coating comprising the following layers moving away from the glass substrate:
a first dielectric layer;
a first high index layer having a refractive index (n) of at least about 2.2;
a first layer comprising zinc oxide;
a first EMI shielding layer comprising silver contacting the first layer comprising zinc oxide;
a first layer comprising an oxide of Ni and/or Cr contacting the first EMI shielding layer comprising silver;
a first metal oxide layer;
a second layer comprising zinc oxide;
a second EMI shielding layer comprising silver contacting the second layer comprising zinc oxide;
a second layer comprising an oxide of Ni and/or Cr contacting the second EMI shielding layer comprising silver;
a second metal oxide layer;
a third layer comprising zinc oxide;
a third EMI shielding layer comprising silver contacting the third layer comprising zinc oxide;
a third layer comprising an oxide of Ni and/or Cr contacting the third EMI shielding layer comprising silver;
an overcoat layer;
and
wherein the third EMI shielding layer comprising silver is thicker by at least 2 nm than the first EMI shielding layer comprising silver.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/064,426Filed 24 Mar 2011 · continuation
Priority: 27 May 2008
Published: US 2011/0169402 A114 Jul 2011
Granted: 30 Oct 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

G02B 1/00
Optical elements characterised by the material of which they are made
C03C 17/36
With at least two coatings having different compositions: at least one coating being a metal
C03C 17/3618
The metal being present as a layer: coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
C03C 17/3626
The metal being present as a layer: one layer at least containing a nitride, oxynitride, boronitride or carbonitride

Family

Application61/071,936Us provisional application · filed 27 May 2008
Application12/230,033Parent of this continuation · filed 21 Aug 2008
Application12/659,912Parent of this continuation · filed 25 Mar 2010
US 2011/0169402 A1Pre-grant publication · published 14 Jul 2011
US 7,931,971 B2Parent of this continuation
US 7,713,633 B2Parent of this continuation
US 2009/0297864 A1Published application
US 2010/0187990 A1Published application
US 8,298,678 B2This patent

From the US filing history. Foreign family members aren’t listed.