Method and apparatus for adjustment of fed image

A field emission device system, comprising:

• a substrate;
• a first electrically conductive structure disposed over the substrate;
• electron emitting structures disposed above, and extending upward relative to, the first electrically conductive structure;
• an insulating layer disposed above the first electrically conductive structure, with the insulating layer having an opening therein for receiving and surrounding each electron emitting structure;
• a second electrically conductive structure disposed above the insulating layer, with the second electrically conductive layer having an opening aligned with each opening in the insulating layer and an opening in the second electrically conductive structure surrounding an electron emitting structure;
• a light transmissive faceplate disposed above the second conductive structure;
• a third electrically conductive structure disposed below the faceplate toward the second electrically conductive structure;
• phosphor material disposed below the third electrically conductive structure toward the second electrically conductive structure with the phosphor material being capable of emitting light when excited by electrons;
• a matrix structure disposed below the third conductive structure toward the second conductive structure;
• a controller that is electrically connected to the first, second, and third conductive structures for controllably providing a first voltage to the first conductive structure, an adjustable second voltage to the second conductive structure, and an adjustable third voltage to the third conductive structure, with the first voltage being at a predetermined level, the second and third voltages being more positive than the first voltage, and the second and third voltages being separately adjustable so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages, the second and third voltages being adjustable in respective ranges to effect an electron emission stream from each electron emitting structure that is controllable with regard to an area of phosphor material upon which a particular electron emission stream impinges;
• and
• a user interface that is connected to the controller for provide signals to the controller for separately adjusting the adjustable second and third voltages so that an adjustment causing a voltage change in one of the second and third voltages can be made without causing a corresponding voltage change in the other of the second and third voltages.

A method for on-line adjustment of image definition at a faceplate of a field emission device system, with the field emission display system including a first electrically conductive structure, electron emitting structures disposed above, and extending upward relative to, the first electrically conductive structure, a second electrically conductive structure disposed above the first electrically conductive structure, a third conductive structure disposed above the second electrically conductive structure, phosphor material disposed below the third electrically conductive structure toward the second electrically conductive structure, and a controller that is electrically connected to the first, second, and third electrically conductive structures for controllably providing a first voltage to the first conductive structure, an adjustable second voltage to the second electrically conductive structure, and an adjustable third voltage to the third electrically conductive structure, with the first voltage being at a predetermined level, and the second and third voltages being separately adjustable so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages, the second and third voltages being adjustable in respective ranges to effect an electron emission stream from each electron emitting structure that is controllable with regard to an area of phosphor material upon which a particular electron emission stream impinges, comprising:

• (a) viewing a current visual representation of an image on a faceplate disposed above the second electrically conductive structure;
• and
• (b) by at least one adjustment to at least one of said second and third voltages, each said adjustment to one of said second and third voltages being separate from each said adjustment to the other of said second and third voltages so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages, adjusting a ratio of the adjustable third voltage to the adjustable second voltage to cause the electron emission streams emitted by the electron emitter structures to respectively impinge upon a lesser area of a phosphor than before the adjustment to the ratio was made.

A method for on-line adjustment of image definition at a faceplate of a field emission device system, with the field emission display system including, a first electrically conductive structure, electron emitting structures disposed above, and extending upward relative to, the first electrically conductive structure, a second electrically conductive structure disposed above the second electrically conductive structure, a third conductive structure disposed above the second electrically conductive structure, phosphor material disposed below the third electrically conductive structure toward the second electrically conductive structure, and a controller that is electrically connected to the first, second, and third electrically conductive structures for controllably providing a first voltage to the first conductive structure, an adjustable second voltage to the second electrically conductive structure, and an adjustable third voltage to the third electrically conductive structure, with the first voltage being at a predetermined level, and the second and third voltages being separately adjustable so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages, the second and third voltages being adjustable in respective ranges to effect an electron emission stream from each electron emitting structure that is controllable with regard to an area of phosphor material upon which a particular electron emission stream impinges, comprising:

• (a) viewing a current visual representation of an image on a faceplate disposed above the second electrically conductive structure;
• and
• (b) by at least one adjustment to at least one of said second and third voltages, each said adjustment to one of said second and third voltages being separate from each said adjustment to the other of said second and third voltages so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages, adjusting a ratio of the adjustable third voltage to the adjustable second voltage to cause the electron emission streams emitted by the electron emitter structures to respectively impinge upon a greater area of a phosphor than before the adjustment to the ratio was made.

A field emission display, comprising:

• a substrate assembly having a plurality of emitter tips thereabove;
• a conductive grid assembly disposed in spaced relation to said substrate, said grid including a plurality of conductive elements;
• a display screen disposed in spaced relation to said grid assembly and on the opposite side of said grid assembly from said substrate assembly, said screen including a plurality of conductive elements;
• and
• a control assembly configured to couple a first voltage to said conductive elements of said grid assembly and to couple a second voltage to said conductive elements of said screen assembly, said control assembly operable to vary the magnitude of said first and second voltages, said control assembly operable to vary the magnitude of one of said first and second voltages separately from varying the other of said first and second voltages so that an adjustment causing a voltage increase in one of the first and second voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the first and second voltages.

A field emission display, comprising:

• a substrate assembly having a plurality of emitter tips thereabove, said emitter tips operable to emit electrons at least partially in response to a first voltage applied thereto;
• a conductive grid assembly disposed in spaced relation to said substrate, said conductive grid assembly comprising a plurality of conductive elements;
• a display screen disposed in spaced relation to said grid assembly, said display screen comprising a plurality of conductive elements;
• a first variable voltage supply coupled to said conductive elements of said grid assembly;
• and
• a second variable voltage supply coupled to said conductive elements of said display screen,
• said first and second variable voltage supplies being separately variable so that an adjustment causing a voltage increase in one of the first and second variable voltage supplies can take effect concurrently with another adjustment causing a voltage decrease in the other of the first and second variable voltage supplies.

A method of adjusting the image output of a field emission display having a plurality of emitter tips, an extraction grid, and a display screen, comprising:

• applying a first voltage to a first plurality of said emitter tips;
• applying a second voltage to at least a portion of said extraction grid;
• applying a third voltage to at least a portion of said display screen, said second and third voltages being separately variable so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages;
• and
• varying at least one of said second and third voltages sufficiently to alter the image rendered by said display.

A method of altering the image rendered by a field emission display including a plurality of emitter tips, an extraction grid and conductive elements in a display screen, comprising:

• applying a first voltage to at least one emitter tip of said plurality of emitter tips;
• applying a second voltage to said extraction grid at a location proximate said emitter tip to which said first voltage is applied;
• applying a third voltage to a portion of said display screen, said second and third voltages being separately variable so that an adjustment causing a voltage increase in one of the second and third voltages can take effect concurrently with another adjustment causing a voltage decrease in the other of the second and third voltages, said first, second and third voltages cooperating with said structure to generate an electron emission stream impinging upon a first area of said display screen;
• and
• changing the area of said display screen impinged by said electron emission stream.