Manganese activated zinc silicate phosphor and plasma display panel

• US 20050269552A1
• Filed: 05/27/2005
• Published: 12/08/2005
• Est. Priority Date: 06/02/2004
• Status: Active Grant

• Current Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Inventors: Okada, Hisatake, Furusawa, Naoko, Hoshino, Hideki
• Granted Patent: US 7,384,575 B2
• Time in Patent Office: Days
• US Class Current: 252/301.60F
• CPC Class Codes: C09K 11/595 with zinc or cadmium
• CPC Class Codes: C09K 11/7734 Aluminates
• CPC Class Codes: C09K 11/7797 Borates
• 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 manganese activated zinc silicate phosphor comprising phosphor particles having a crystal lattice distortion factor of 0.01 to 1.0% which exhibites high emission intensity and reduced afterglow time and a PDP utilizing the same which exhibites high white luminance and a high luminance maintaining ratio.

Claims

1. A manganese activated zinc silicate phosphor comprising phosphor particles having a crystal lattice distortion factor of 0.01 to 1.0%.

2. The manganese activated zinc silicate phosphor of claim 1, wherein the phosphor particles have a crystal lattice distortion factor of 0.02 to 1.0%.

3. The manganese activated zinc silicate phosphor of claim 1, wherein the phosphor particles have a crystal lattice distortion factor of 0.02 to 0.6%.

4. The manganese activated zinc silicate phosphor of claim 1, wherein the phosphor particles have a crystal lattice distortion factor of 0.04 to 0.6%.

5. The manganese activated zinc silicate phosphor of claim 1, wherein

a content of manganese in the phosphor particles is 2 to 9% by mole based on the total mole of zinc contained in the phosphor particles;

and

the phosphor particles further contain barium and a molar ratio of Ba/Mn in the phosphor particles is 0.005 to 0.2.

6. The manganese activated zinc silicate phosphor of claim 1, wherein

a content of manganese in the phosphor particles is 4 to 8% by mole based on the total mole of zinc contained in the phosphor particles;

and

the phosphor particles further contain barium and a molar ratio of Ba/Mn in the phosphor particles is 0.02 to 0.1.

7. The manganese activated zinc silicate phosphor of claim 1, wherein a number of the phosphor particle having a particle diameter of not more than 2 μ

m is not less than 70% of the total number of phosphor particles.

8. A plasma display panel having a phosphor layer containing the manganese activated zinc silicate phosphor of claim 1.