Plasma picture screen with terbium(III)-activated phosphor

• US 6,462,473 B1
• Filed: 05/18/2001
• Issued: 10/08/2002
• Est. Priority Date: 05/19/2000
• Status: Expired due to Term

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: De Zwart, Siebe Tjerk, Juestel, Thomas, Spekowius, Gerhard, Oversluizen, Gerrit, Van Heusden, Sybrandus
• Primary Examiner(s): Patel, Ashok
• Assistant Examiner(s): Clove, Thelma Sheree
• Application Number:
  US09/860,313
• Publication Number:
  US 20020047520A1
• Time in Patent Office: 508 Days
• Field of Search: 313/586, 313/581, 313/582, 313/585, 313/587, 313/485, 313/486
• US Class Current: 313/586
• CPC Class Codes: C09K 11/778 Borates
• CPC Class Codes: H01J 2211/42 Fluorescent layers

Abstract

A plasma picture screen is provided with a front plate, which comprises a glass plate on which a dielectric layer and a protective layer are provided, with a carrier plate provided with a phosphor layer comprising a red and a blue phosphor as well as a green, Tb³⁺-activated phosphor, with a ribbed structure that subdivides the space between the front plate and the carrier plate into plasma cells filled with a gas comprising xenon, and with one or several electrode arrays on the front plate and the carrier plate for generating corona discharges in the plasma cells. The gas comprises xenon in a proportion of between 5 and 30% by volume.

Claims

1. A plasma picture screen provided with a front plate, which comprises a glass plate on which a dielectric layer and a protective layer are provided, with a carrier plate provided with a phosphor layer comprising a red and a blue phosphor as well as a green, Tb³⁺-activated phosphor, with a ribbed structure which subdivides the space between the front plate and the carrier plate into plasma cells which are filled with a gas comprising xenon, and with one or several electrode arrays on the front plate and the carrier plate for generating corona discharges in the plasma cells, characterized in that the gas comprises xenon in a proportion of between 5% and 30% by volume.

2. A plasma picture screen as claimed in claim 1, characterized in that the proportion of xenon in the gas is 10% by volume.

3. A plasma picture screen as claimed in claim 1, characterized in that the green Tb³⁺-activated phosphor is chosen from the group (In_xGd_1-x)BO₃:

Tb (0≦

x≦

1), Y₂SiO₅;

Tb, CeMgAl₁₁O₁₉;

Tb, (Y_1-x-yGd_xPr_y)BO₃;

Tb (0≦

x≦

1,0≦

y≦

0.05), GdMgB₅O₁₀;

Ce,Tb and LaPO₄;

Ce,Tb.

4. A plasma picture screen as claimed in claim 3, characterized in that the green Tb³⁺-activated phosphor comprises (Y_1-x-yGd_xPr_y)BO₃:

Tb (0≦

x≦

1,0≦

y≦

0.05).