Display with UV-light emitting phosphor

• US 5,821,685 A
• Filed: 01/10/1997
• Issued: 10/13/1998
• Est. Priority Date: 05/13/1996
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Peterson, Ronald O.
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): DAY, MICHAEL HENRY
• Application Number:
  US08/780,948
• Time in Patent Office: 641 Days
• Field of Search: 313/495, 313/496, 313/497, 313/309, 313/351, 313/336, 313/467, 313/468, 313/486, 313/487, 313/422
• US Class Current: 313/467
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/7702 with zinc or cadmium
• CPC Class Codes: H01J 2329/00 Electron emission display panels, e.g. field emission display panels
• CPC Class Codes: H01J 2893/0031 Tubes with material luminescing under electron bombardment
• CPC Class Codes: H01J 29/085 Anode plates, e.g. for screens of flat panel displays

Abstract

A display (300, 400) includes a face plate (40, 60) having an inner surface, a back plate (44, 64) having an inner surface opposing the inner surface of the face plate (40, 60), an electron source (48, 68) opposing the inner surface of the face plate (40, 60), and a phosphor (49, 72, 70) disposed on the face plate (40, 60). The phosphor (49, 72, 70) includes an electron-excitable UV-emitting material (52, 72) and a UV-excitable light-emitting phosphor (50, 70). The UV-excitable light-emitting phosphor (50, 70) is disposed to receive UV radiation emitted by the electron-excitable UV-emitting material (52, 72). The electron-excitable UV-emitting material (52, 72) includes a sol-gel product formed using sol-gel techniques.

Claims

1. A display comprising:

a face plate having an inner surface;

a back plate having an inner surface opposing the inner surface of the face plate the face plate and the back plate defining an interspace region, the interspace region being evacuated;

an electron source disposed within the interspace region and opposing the inner surface of the face plate; and

a phosphor disposed on the face plate, the phosphor comprising an electron-excitable UV-emitting material and a UV-excitable light-emitting phosphor, the UV-excitable light-emitting phosphor disposed to receive UV radiation emitted by the electron-excitable UV-emitting material, the electron-excitable UV-emitting material comprising a sol-gel product.

2. The display as claimed in claim 1, further including an anode conductor disposed on the face plate within the interspace region, wherein the face plate has an outer surface, wherein the electron-excitable UV-emitting material is disposed on the anode conductor, and wherein the UV-excitable light-emitting phosphor is disposed on the outer surface of the face plate.

3. The display as claimed in claim 1, wherein the electron-excitable UV-emitting material is disposed on the UV-excitable light-emitting phosphor.

4. A display as claimed in claim 1 wherein the electron source includes a plurality of field emission devices.

5. A display as claimed in claim 4 wherein each of the plurality of field emission devices includes a low work function material being selected from a group consisting of diamond and diamond-like carbon.