Signal converting system using barrier grid-type storage tube

Claim 2

A scan conversion system including an electronic tube for storing electrical input signals and providing electrical output signals corresponding thereto, said tube comprising a thin dielectric sheet having a secondary electron emission ratio greater than unity between first and second predetermined voltages, a backing electrode on one side of said thin dielectric sheet and an electrically conductive grid electrode member on the opposite side thereof, thereby to provide a target assembly, an electron beam producing means for writing information on said target assembly and for reading said information stored thereon, said electron beam producing means facing and being adapted to scan the side of said target assembly on which said grid electrode member is disposed, and a decelerator member disposed between said beam producing means and said target assembly; means for maintaining said backing electrode and said electrically conductive grid at fixed potentials, the potential of said electrically conductive grid being between said first and second predetermined voltages; means for scanning said target assembly with said electron beam producing means thereby to erase the storage surface thereof; and thereafter, means for reducing the potential applied to said backing electrode thereby to prime the storage surface of said target assembly without further use of said beam-producing means.

Claim 3

The scan conversion system as defined in claim 1 wherein said thin dielectric sheet is typically greater than 3 and less than 6 mils thick.

Claim 4

The scan conversion system as defined in claim 1 wherein said thin dielectric sheet is composed of quartz.

Claim 5

The scan conversion system as defined in claim 1 wherein the potential applied to aid backing electrode is reduced substantially 10 times the amplitude of the voltage required to prime the storage surface of said target assembly.

Claim 6

A scan conversion system including an electronic tube for storing electrical input signals and prOviding electrical output signals corresponding thereto, said tube comprising a thin dielectric sheet having a secondary electron emission ratio greater than unity between first and second predetermined voltages, a backing electrode on one side of said thin dielectric sheet and an electrically conductive grid electrode member on the opposite side thereof, thereby to provide a target assembly, an electron beam producing means for writing information on said target assembly and for reading said information stored thereon, said electron beam producing means facing and being adapted to scan the side of said target assembly on which said grid electrode member is disposed, and a decelerator member disposed between said beam producing means and said target assembly; an output resistor connected to said electrically conductive grid electrode member; means connected to said backing electrode and through said output resistor to said electrically conductive grid electrode member for maintaining said backing electrode and said electrically conductive grid at fixed potentials, the potential of said electrically conductive grid being between said first and second predetermined voltages; means for scanning said target assembly with said electron beam producing means thereby to erase the storage surface thereof; and thereafter, means for reducing the potential applied to said backing electrode thereby to prime the storage surface of said target assembly without further use of said beam-producing means.

Claim 7

A scan conversion system including an electronic tube for storing electrical input signals and prOviding electrical output signals corresponding thereto, said tube comprising a thin dielectric sheet having a secondary electron emission ratio greater than unity between first and second predetermined voltages, a backing electrode on one side of said thin dielectric sheet and an electrically conductive grid electrode member on the opposite side thereof, thereby to provide a target assembly, an electron beam producing means for writing information on said target assembly and for reading said information stored thereon, said electron beam producing means facing and being adapted to scan the side of said target assembly on which said grid electrode member is disposed, and a decelerator member disposed between said beam producing means and said target assembly; an output resistor connected to said electrically conductive grid electrode member; means connected to said backing electrode and through said output resistor to said electrically conductive grid electrode member for maintaining said backing electrode and said electrically conductive grid at fixed potentials, the potential of said electrically conductive grid being between said first and second predetermined voltages; means for scanning said target assembly with said electron beam producing means thereby to erase the storage surface thereof; and thereafter, means for reducing the potential applied to said backing electrode thereby to prime the storage surface of said target assembly without further use of said beam-producing means.

Claim 8

The scan conversion system as defined in claim 5 additionally including first and second silicon diodes connected back-to-back across said output resistor thereby to provide for more rapid voltage stabilization on said backing electrode and said electrically conductive grid electrode member following mode switching.