Plasma display device with improved luminance

• US 7,911,139 B2
• Filed: 02/20/2007
• Issued: 03/22/2011
• Est. Priority Date: 02/23/2006
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nagasaki, Yoshihisa, Shigetoh, Nobuyuki, Sugimoto, Kazuhiko, Hibino, Junichi, Horikawa, Keiji, Miyamae, Yuichiro, Toyoda, Izumi
• Primary Examiner(s): Williams; Joseph L
• Assistant Examiner(s): Farokhrooz; Fatima N
• Application Number:
  US11/886,685
• Publication Number:
  US 20090026949A1
• Time in Patent Office: 1,491 Days
• Field of Search: 313582-587, 313483-494
• US Class Current: 313/582
• CPC Class Codes: C09K 11/595 with zinc or cadmium
• CPC Class Codes: H01J 11/12 with main electrodes provided on both sides of the discharge space
• CPC Class Codes: H01J 11/42 Fluorescent layers

Abstract

A plasma display device has a panel main body in which a pair of transparent substrates is arranged in opposition so as to form a discharge space between the substrates on at least a front side. Barrier ribs are arranged on at least one of the substrates to divide the discharge space into a plurality of spaces. A group of electrodes is arranged on the substrates so as to generate discharge in the discharge space divided with the barrier ribs. Phosphor layers that emit by discharge are also provided. The phosphor layers are equipped with a green phosphor layer including at least Zn₂SiO₄:Mn, a surface of Zn₂SiO₄:Mn is coated with aluminum oxide, and a ratio of an Al element to a Si element on the surface measured with an XPS apparatus is 0.6 to 4.0.

Claims

1. A plasma display device comprising:

a pair of substrates confronting each other so as to form a discharge space between the substrates;

a plurality of barrier ribs arranged on at least one of the substrates to divide the discharge space into a plurality of spaces;

a group of electrodes arranged on the substrates so as to generate discharge in the discharge space divided with the barrier ribs;

a phosphor layer, which emits light by discharge, located on one of the substrates, wherein

the phosphor layer is equipped with a green phosphor layer including Zn₂SiO₄;

Mn, a surface of the Zn₂SiO₄;

Mn is coated with aluminum oxide, and a ratio of an Al element to a Si element on the surface measured with an XPS apparatus within 10 nm from an outermost surface is not less than 0.6 nor more than 4.0.

2. The plasma display device according to claim 1, wherein the ratio of the Al element to the Si element is not less than 1.4 nor more than 2.2.