Image forming device fabrication method and fabrication apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTatsuya Iwasaki, Izumi Tabata
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Abstract
There are provided a highly reliable fabrication method and apparatus for an image forming device which can avoid element deterioration along with elimination of gas molecules from panel constituents. An image forming device having an electron source substrate with a large number of electron sources each having an electron-emitting element and a luminescent display plate facing the electron source substrate via a vacuum portion is fabricated by performing the aging step of aging the interior of the vacuum portion while exhausting or maintaining with a getter the vacuum state of the vacuum portion. This aging step is performed by drive duty control of gradually increasing the drive duty of the image forming device.
Claims16
A method of fabricating an image forming device having an electron source substrate, a plurality of electron-emitting elements disposed on the electron source substrate, and a luminescent display plate separated from the electron source substrate by a vacuum portion, the method comprising the steps of:
- selectively exhausting or maintaining a vacuum state of the vacuum portion, using a getter;
- applying signals to selected ones of the electron-emitting elements;
- and
- controllably varying at least one characteristic of the signals applied to the selected electron-emitting elements, while selectively exhausting or maintaining the vacuum state of the vacuum portion, so as to cause an aging condition in the image forming device,
- wherein the step of controllably varying the at least one characteristic of the signals is performed by gradually increasing a pulse width of each signal up to a predetermined maximum drive pulse width, over a predetermined time period, while maintained a frequency of the signal substantially constant.
A method of fabricating an image forming device having an electron source substrate, a plurality of electron-emitting elements disposed on the electron source substrate, and a luminescent display plate separated from the electron source substrate by a vacuum portion, the method comprising the steps of:
- selectively exhausting or maintaining a vacuum state of the vacuum portion, using a getter;
- applying signals to selected ones of the electron-emitting elements;
- and
- controllably varying at least one characteristic of the signals applied to the selected electron-emitting elements, while selectively exhausting or maintaining the vacuum state of the vacuum portion, so as to cause an aging condition in the image forming device,
- wherein the step of controllably varying the at least one characteristic of the signals is performed by gradually increasing a frequency of each signal over a predetermined time period, while maintained a pulse width of the signal substantially constant.
A method of fabricating an image forming device having an electron source substrate, a plurality of electron-emitting elements disposed on the electron source substrate, and a luminescent display plate separated from the electron source substrate by a vacuum portion, the method comprising the steps of:
- selectively exhausting or maintaining a vacuum state of the vacuum portion, using a getter;
- applying signals to selected ones of the electron-emitting elements, while selectively exhausting or maintaining the vacuum state of the vacuum portion;
- and
- controllably varying the number of electron-emitting elements to which the signals are applied, over a predetermined time period, so as to cause an aging condition in the image forming device,
- wherein the controllably varying step is performed by applying the signals to an increased number of the electron-emitting devices.
Dependencies are inferred from the claim text.