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US 7,129,631 B2Granted
Black matrix for flat panel field emission displays
AssigneeMicron Technology, Inc.
InventorRobert T. Rasmussen
Life of this patent
Estimating the term…
Abstract
A flat panel field emission device includes a black matrix formed from an electrically insulative material such as praseodymium-manganese oxide. The insulative black matrix increases image contrast and reduces power consumption. For field emission devices which utilize a switched anode for selectively activating pixels, the insulative material reduces or eliminates problems associated with short circuiting of the pixels.
Claims18
A flat panel field emission display comprising:
- a screen having a phosphor coating;
- an emission source opposite the screen configured to selectively excite portions of the phosphor coating to generate visible light by impingement thereon of electrons emitted by the emission source;
- and
- a black matrix provided on the screen, the black matrix comprising praseodymium-manganese oxide having a molar ratio of praseodymium to manganese configured as an insulator and further configured on the screen to direct the electrons toward the phosphor coating and to prevent drainage thereby of electrons emitted from the emission source.
1 more element
A flat panel field emission display, comprising:
- a faceplate including a screen, phosphors on the screen, and a black matrix on the screen;
- a baseplate assembly including a plurality of electron emission cathode tips arranged in an array and a low potential extraction grid;
- wherein the black matrix is formed from PrMnO3 of a molar ratio of praseodymium to manganese configured as an insulator and further configured to direct the electrons toward the phosphors on the screen and to prevent drainage of electrons emitted from the cathode tips toward the phosphors.
A flat panel field emission display comprising:
- a screen comprising a phosphor coating arranged to provide different color segments, and a matrix of anode electrodes mutually isolating at least some of the different color segments;
- an emission source opposite the screen for selectively exciting portions of the phosphor coating by impingement of electrons thereon to generate visible light;
- and
- a black matrix provided on the screen, the black matrix being formed from a substantially insulating material,
- wherein an anode switching scheme is used to drive the flat panel field emission display and the insulating material is of a sufficient resistance to prevent electrical shorting between the different color segments;
- and
- the insulating material comprises praseodymium-manganese oxide of a molar ratio of praseodymium to manganese configured as an insulator and further configured to direct the electrons toward the phosphor coating.
4 more elements
Dependencies are inferred from the claim text.