Fluorescent display elements

Claim 2

A fluorescent display element comprising: a substrate; a transparent envelope hermetically sealed to said substrate and forming an evacuated sealed space therebetween; a switching element formed on said substrate within said sealed space; a fluorescent film formed on a part of said switching element; a cathode electrode provided within said sealed space in spaced-apart facing relationship with said flourescent film; and a grid electrode interposed between and spaced apart from said cathode electrode and said fluorescent film.

Claim 3

A fluorescent display element as recited in claim 1 wherein said switching element has a memory function.

Claim 4

A fluorescent display element as recited in claim 1 wherein said switching element includes a field effect transistor having a source electrode and said fluorescent film is formed on said source electrode.

Claim 5

A fluorescent display element as recited in claim 1 wherein said switching element includes a MIS type transistor having a drain electrode and said fluorescent film is formed on said drain electrode.

Claim 6

A fluorescent display element as recited in claim 1 wherein said switching element includes a thin film transistor having a drain electrode and said fluorescent film is a phosphor member formed on said drain electrode.

Claim 7

A fluorescent display element as recited in claim 1 wherein said switching element includes a field effect transistor having a source electrode and a drain electrode, and said fluorescent film is formed on one of said electrodes.

Claim 8

A fluorescent display element as recited in claim 1 wherein said switching element includes a MIS type transistor having a source electrode and a drain electrode, and said fluorescent film is formed on one of said electrodes.

Claim 9

A fluorescent display element as recited in claim 4 wherein said switching element has a memory function.

Claim 10

A fluorescent display element as recited in claim 5 wherein said switching element has a memory function.

Claim 11

A fluorescent display device comprising: a substrate; a transparent envelope hermetically sealed to said substrate and forming an evacuated sealed space therebetween; a plurality of switching elements arranged on said substrate in the form of a matrix, each said switching element including a fluorescent film applied to a part thereof, a first electrode connected to an X-axis lead wire, and a second electrode connected to a Y-axis lead wire of said matrix; a plurality of cathode electrodes provided in said sealed space in spaced-apart facing relationship with said fluorescent films; and a control electrode disposed between and spaced apart from said cathode electrodes and said fluorescent films.

Claim 12

A fluorescent display device comprising: a substrate; a transparent envelope hermetically sealed to said substrate and forming an evacuated sealed space therebetween; a plurality of switching elements arranged on said substrate in the form of a matrix, each said switching element including a fluorescent film applied to a part thereof, a first electrode connected to an X-axis lead wire, and a second electrode connected to a Y-axis lead wire of said matrix; a plurality of cathode electrodes provided in said sealed space in spaced-apart facing relationship with said fluorescent films; and a control electrode disposed between and spaced apart from said cathode electrodes and said fluorescent films.

Claim 13

A fluorescent display device as recited in claim 10 which further comprises an overcoat for separating and assembling the plurality of switching elements into an integrated circuit.

Claim 14

A fluorescent display device as recited in claim 11 wherein each switching element includes a field effect transistor having a source electrode, drain electrode and a gate electrode, and wherein said fluorescent film includes a layer of phosphor formed on the source electrode, the gate electrode is connected to an X-axis lead wire, and the drain electrode is connected to a Y-axis lead wire of the matrix.

Claim 15

A fluorescent display device as recited in claim 11 wherein each switching element includes a MIS type transistor having a drain electrode, a source electrode and a gate electrode, and wherein a phosphor member is formed on the drain electrode, the source electrode is connected to an X-axis lead wire and the gate electrode is connected to a Y-axis lead wire.

Claim 16

A fluorescent display device as recited in claim 11 wherein each said switching element comprises a thin film transistor including a drain electrode, a source electrode and a gate electrode, and wherein a phosphor member is formed on the drain electrode, the source electrode is connected to an X-axis lead wire and the gate electrode is connected to a Y-axis lead wire of the matrix.