Claims
- 1. A flat panel field emission display comprising:
a screen having a phosphor coating; an emission source opposite said screen which selectively excites portions of said phosphor coating to generate visible light; and a black matrix provided on said screen, said black matrix being formed of a substantially insulative material.
- 2. The display of claim 1, wherein said black matrix is formed from praseodymium-manganese oxide.
- 3. The display device of claim 1, wherein said emission source includes an array of field emitter tip cathodes.
- 4. The display of claim 3, wherein said emission source further includes a low potential extraction grid provided adjacent said field emitter tip cathodes.
- 5. The display of claim 4, wherein said array of field emitter tips is formed in matrix addressable by row select control signals.
- 6. The display of claim 5, wherein said extraction grid is a continuous electrode, and wherein said field emitter tip matrix is further addressable by column select control signals.
- 7. The display of claim 5, wherein said extraction grid includes a plurality of column electrodes addressable by column select control signals.
- 8. The display of claim 4, wherein said extraction grid is held at a substantially constant low potential value and said field emitter tips are held at a substantially constant potential value higher than said low potential value, and said screen includes a matrix of anode electrodes which are addressable by row and column control signals.
- 9. The display of claim 1, wherein said display provides color images and wherein said black matrix improves image contrast.
- 10. A flat panel field emission display, comprising:
a faceplate including a screen, phosphors provided on said screen, and a black matrix provided on said screen; a baseplate assembly including a plurality of electron emission cathode tips arranged in an array and a low potential extraction grid; wherein said black matrix is formed from a substantially insulative material.
- 11. The field emission display of claim 10, wherein said black matrix material is PrMnO3.
- 12. The field emission display of claim 10, wherein said low potential gate is a continuous electrode, and wherein said field emitter tip matrix is further addressable by column select control signals.
- 13. The field emission display of claim 12, wherein said low potential gate includes a plurality of column electrodes addressable by column select control signals.
- 14. The field emission display of claim 12, wherein said low potential gate is held at a substantially constant low potential value and said field emitter tips are held at a substantially constant potential value higher than said low potential value and said screen includes a matrix of anode electrodes which are addressable by row and column control signals.
- 15. A method of making a flat panel field emission display comprising the steps of:
providing a phosphor coating on a display screen; arranging an emission source opposite said display screen for selectively exciting portions of said phosphor coating to generate visible light during subsequent operation; and providing a black matrix on said screen, said black matrix being formed of a substantially insulative material.
- 16. The method of claim 15, wherein said black matrix is formed from praseodymium-manganese oxide.
- 17. The method of claim 16, wherein said praseodymium-manganese oxide is prepared by combining selected amounts of Pr6O11 with a material selected from the group including MnO2 and MnCO3; and heating the resulting combination at a temperature ranging from approximately 1200° C. to 1500° C.
- 18. The method of claim 17, wherein said heating temperature ranges approximately from 1250° C. to 1430° C.
- 19. The method of claim 18, wherein the resulting combination is heated for approximately four hours at the heating temperature.
- 20. The method of claim 17, wherein the resulting combination is heated for approximately four hours at the heating temperature.
- 21. The method of claim 17, including the further step of milling the resulting combination subsequent to said heating step to yield a powder having about a 2 μm average particle size.
- 22. The method of claim 16, wherein said black matrix forming step includes patterning a photoresist material on said screen to expose only those areas of the screen on which the black matrix is to be deposited; depositing said praseodymium-manganese oxide; and removing said photoresist material.
- 23. The method of claim 22, wherein said step of providing a phosphor coating is performed subsequent to said black matrix forming step and includes patterning a second photoresist material to expose only those areas of the screen on which said phosphor coating is to be provided; depositing said phosphor coating; and removing said second photoresist material.
- 24. The method of claim 16, wherein said black matrix forming step includes providing a uniform layer of praseodymium-manganese oxide on said display screen and selectively etching portions of said uniform layer which do not correspond to said black matrix.
- 25. The method of claim 15, wherein said emission source arranging step arranges an array of field emitter tip cathodes opposite said display screen.
- 26. The method of claim 25, including the further step of providing a low potential extraction grid adjacent said field emitter tip cathodes.
- 27. The method of claim 26, wherein said low potential extraction grid is formed from a continuous electrode.
STATEMENT OF GOVERNMENT INTEREST
[0001] This invention was made with Government support under Contract No. DABT63-93-C-0025 awarded by Advanced Research Projects Agency (ARPA). The Government has certain rights in this invention.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09339958 |
Jun 1999 |
US |
Child |
10339409 |
Jan 2003 |
US |