Electron source, image forming apparatus, and manufacture method for electron source
AssigneeCanon Kabushiki Kaisha
InventorsTakeo Ono, Toru Sugeno
Life of this patent
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Abstract
Uniformity of the electron emission characteristics of electron emitting devices is improved. A substrate is formed with row-directional wires and column-directional wires electrically connected to electron emitting devices disposed in a matrix shape and each having electrodes and an electroconductive film. A pseudo row-directional wire is formed at a position X0 between a position X1 of a row-directional wire and a periphery of the substrate, and a pseudo column-directional wire is formed at a position Y0 between a position Y1 of a column-directional wire and a periphery of the substrate. Pseudo electrodes and are electrically connected to the pseudo row-directional wire and pseudo column-directional wire.
Claims26
An electron source having a plurality of first wires and a plurality of electron emitting devices respectively formed on a substrate, the first wires having a longitudinal direction generally along a first direction and the electron emitting devices being connected to each of the first wires, comprising:
- at least one first conductor formed between first outer electron emitting devices among the plurality of electron emitting devices and an outer periphery of the substrate at least on one side of the substrate, and near the first outer electron emitting devices, the first wire not being formed between the outer periphery and the first outer electron emitting devices, said first conductor having a side on a side of the first outer electron emitting devices, the side extending generally along the first direction,
- wherein the said conductor is not connected to electron emitting devices connected directly in a wire to which at least some of the plurality of electron emitting devices are connected.
An electron source according to claim 1 or 3, further comprising at least one second wire formed on the substrate, the second wire having a longitudinal direction generally along a second direction crossing the first direction, each electron emitting device is connected to one of the first wires and said second wire.
An electron source having a plurality of first wires, a plurality of second wires, and a plurality of electron emitting devices respectively formed on a substrate, the first wires having a longitudinal direction generally along a first direction, the second wires having a longitudinal direction generally along a second direction crossing the first direction, and the electron emitting device being connected each of the first wires and each of the second wires at a cross point therebetween, comprising:
- at least one first conductor formed between first outer electron emitting devices among the plurality of electron emitting devices and an outer periphery of the substrate at least on one side of the substrate, and near the first outer electron emitting devices, the first wire not being formed between the outer periphery and the first outer electron emitting devices, said first conductor having a side on a side of the first outer electron emitting devices, the side extending generally along the first direction;
- and
- at least one second conductor formed between second outer electron emitting devices among the plurality of electron emitting devices and an outer periphery of the substrate at least on one side of the substrate, and near the second outer electron emitting devices, the second wire not being formed between the outer periphery and the second outer electron emitting devices, said second conductor having a side on a side of the second outer electron emitting devices, the side extending generally along the second direction.
An electron source having a plurality of first wires and a plurality of electron emitting devices respectively formed on a substrate, the first wires having a longitudinal direction generally along a first direction and the electron emitting devices being connected to each of the first wires, comprising:
- a plurality of first conductors formed between outer electron emitting devices among the plurality of electron emitting devices and an outer periphery of the substrate at least on one side of the substrate, and near the outer electron emitting devices, the first wires not being formed between the outer periphery and the outer electron emitting devices, said first conductors having a side on a side of the first outer electron emitting devices, the side extending generally along the first direction.
An electron source having a plurality of first wires and a plurality of electron emitting devices respectively formed on a substrate, the first wires having a longitudinal direction generally along a first direction and the electron emitting devices being connected to each of the first wires, comprising:
- at least one first conductor formed between outer electron emitting devices among the plurality of electron emitting devices and an outer periphery of the substrate at least on one side of the substrate, and near the outer electron emitting devices, the first wire not being formed between the outer periphery and the outer electron emitting devices, said first conductor having a side on a side of the outer electron emitting devices, the side extending generally along the first direction, wherein said first conductor is electrically connected to the first wire.
A method of manufacturing an electron source having a plurality of wires and a plurality of electron emitting devices connected to the wires, comprising the step of:
- forming a wiring pattern, and a conductor pattern similar to the wiring pattern in an area different from an area where the wiring pattern is formed, by a screen printing method.
An electron source comprising:
- a substrate;
- electron emitting devices formed on said substrate;
- wires disposed on one side of said electron emitting devices for supplying a power to said electron emitting devices to emit electrons;
- and
- a conductor disposed on another side of said electron emitting devices between a periphery of said substrate and said electron emitting devices, said conductor discharging electric charges accumulated on the other side.
Dependencies are inferred from the claim text.