Image display and a manufacturing method of the same

Abstract

The present invention provides an image display capable of enhancing a production yield. The image display comprises a display device including a first plate which has a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, the electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode; a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction; and a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, a frame component, and a second plate having phosphors, wherein a space surrounded by the first plate, the frame component and the second plate is brought into vacuum. In the display apparatus, the at least one electron-emitter element includes the base electrode and the top electrode, at least one of which is connected to the first electrode or the second electrode through a resistor element.

1. An image display comprising:
 a display device including,  
 a first plate having,  
 a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, said electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode;  
 a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction, of said plurality of electron-emitter elements; and  
 a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, of said plurality of electron-emitter elements;  
 a frame component; and  
 a second plate having phosphors;  
 wherein a space surrounded by said first plate, said frame component and said second plate is brought into vacuum;  
 wherein at least on said electron-emitter element includes its corresponding base electrode and top electrode, at least one of which is connected to the first electrode or second electrode through a resistor element.  
 
     
     
       2. An image display comprising:
 a display device including,  
 a first plate having,  
 a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, said electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode;  
 a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction, of said plurality of electron-emitter element; and  
 a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, of said plurality of electron-emitter elements;  
 a frame component; and  
 a second plate having phosphors;  
 wherein a space surrounded by said first plate, said frame component and said second plate is brought into vacuum;  
 wherein said plurality of electron-emitter elements respectively include the base electrodes and top electrodes, at least one of which are respectively connected to the first electrodes or the second electrodes through resistor elements.  
 
     
     
       3. An image display according to  claim 1 , further including first driving means for supplying driving voltages to said respective first electrode, and second driving means for supplying driving voltages to aid respective second electrodes, and
 the resistance value of said each resistor element is larger than a value obtained by multiplying a larger value of output impedance of said first driving means and an output impedance of said second driving mean by ten times.  
 
     
     
       4. An image display according to  claim 1 , wherein when the resistance value of the resistor element is defined as R, and the electrostatic capacitance of the electron-emitter element is defined as C, the product (R·C) of the resistance value of the resistor element and the electrostatic capacitance of the electron-emitter element is smaller than a horizontal scanning period 1H of a displayed video signal. 
     
     
       5. An image display according to  claim 1 , wherein the resistance value of the resistor element is smaller than a differential resistance of the electron-emitter element in an operation region thereof. 
     
     
       6. An image display according to  claim 1 , wherein each of said resistor elements includes at least some portion thereof that does not intersect either the first electrodes or the second electrodes. 
     
     
       7. An image display according to  claim 1 , wherein the resistor element has at least one bend. 
     
     
       8. An image display according to  claim 1 , wherein the resistor element has a portion narrower than other portions in line width or a portion thinner than other portions in thickness. 
     
     
       9. An image display according to  claim 1 , wherein said each first electrode shares the base electrode of said each electron-emitter element, and the electron-emitter element connected with the resistor element includes the top electrode connected to the second electrode through the resistor element. 
     
     
       10. An image display according to  claim 9 , wherein the electron-emitter element connected with the resistor element has a top electrode busline under-layer film electrically connected to the top electrode, and
 the resistor element is formed of the same material as the top electrode busline under-layer film.  
 
     
     
       11. An image display according to  claim 10 , further including top electrode buslines, each of which is provided so as to cover an edge of the base electrode, and is on the top electrode busline under-layer film. 
     
     
       12. An image display according to  claim 9 , wherein the resistor element is formed of the same material as the top electrode of the electron-emitter element connected with the resistor element. 
     
     
       13. An image display according to  claim 12 , further including top electrode busline each electrically connected to the top electrode and provided so as to cover an edge of the base electrode. 
     
     
       14. An image display according to  claim 1 , wherein said each electron-emitter element has a top electrode busline which is electrically connected to the top electrode and shares the second electrode, and
 the electron-emitter element connected with the resistor element includes the base electrode connected to the first electrode through the resistor element.  
 
     
     
       15. An image display according to  claim 1 , wherein electron-emitter elements from which the resistor elements are respectively cut off and which are respectively electrically disconnected from the first electrodes or the second electrodes. 
     
     
       16. An image display display  comprising:
 a display device including,  
 a first plate having,  
 a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, said electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode;  
 a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction, of said plurality of electron-emitter element; and  
 a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, of said plurality of electron-emitter elements;  
 a frame component; and  
 a second plate having phosphors;  
 wherein a space surrounded by said first plate, said frame component and said second plate is brought into vacuum, and  
 wherein a plurality of said electron-emitter elements respectively include the base electrodes and the top electrodes, at least one of which are respectively connected to the first electrodes or the second electrodes through connection wires.  
 
     
     
       17. An image display a according to  claim 16 , wherein each of said connection wires includes at least some portion thereof that does not intersect either the first electrodes or the second electrodes. 
     
     
       18. An image display according to  claim 16 , wherein the connection wire has at least one bend. 
     
     
       19. An image display according to  claim 16 , wherein the connection wire has a portion narrower than other portions in line width or a portion thinner than other portions in thickness. 
     
     
       20. An image display according to  claim 16 , further including electron-emitter elements from which the connection wires are cut and which are electrically disconnected from the first electrodes or the second electrodes. 
     
     
       21. A method of manufacturing an image display comprising:
 a display device including,  
 a first plate having,  
 a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, said electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode;  
 a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction, of said plurality of electron-emitter elements; and  
 a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, of said plurality of electron-emitter elements;  
 a frame component; and  
 a second plate having phosphors;  
 wherein a space surrounded by said first plate, said frame component and said second plate is brought into vacuum, and wherein said respective electron-emitter elements have the base electrodes and the top electrodes, at least one of which are respectively connected to the first electrodes or the second electrodes through resistor elements, said method comprising the step of: 
 cutting the resistor elements corresponding to arbitrary electron-emitter elements of said plurality of electron-emitter elements and electrically disconnecting the arbitrary electron-emitter elements from the first electrodes or the second electrodes.  
 
 
     
     
       22. A method of manufacturing an image display comprising:
 a display device including,  
 a first plate having,  
 a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, said electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode;  
 a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction, of said plurality of electron-emitter element; and  
 a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, of said plurality of electron-emitter elements;  
 a frame component; and  
 a second plate having phosphors;  
 wherein a space surrounded by said first plate, said frame component and said second plate is brought into vacuum, and  
 wherein said respective electron-emitter elements have the base electrodes and the to  top electrodes, at least one of which are respectively connected to the first electrodes or the second electrodes through connection wires, said method comprising the step of: 
 cutting the connection wires corresponding to arbitrary electron-emitter elements of said plurality of electron-emitter elements and electrically disconnecting the arbitrary electron-emitter elements from the first electrodes or the second electrodes.  
 
 
     
     
       23. An image display, comprising:
   a plurality of electron - emitter elements arranged in a matrix form;        a plurality of column wires arranged in a first direction, and applying a first driving voltage to the electron - emitter elements;        a plurality of row wires arranged in a second direction crossing the first direction, and applying a second driving voltage to the electron - emitter element;        a first plate comprising the row wires and column wires; and        a second plate having phosphors,        wherein a space enclosed by the first plate and the second plate is a vacuum,        the plurality of electron - emitter elements are provided in an area where the column wires are formed and outside the area where the row wires are formed,        the plurality of electron - emitter elements comprise a first electrode and a second electrode,        the first electrode is coupled to the column wire,        the second electrode is coupled to the row wire,        a connecting wire is placed between the second electrode and the row wire, and        the line width of the row wire is thicker than the line width of the connecting wire.     
     
     
       24. The image display according to  claim 23 , wherein the connecting wire is resistor element. 
     
     
       25. The image display according to  claim 23 , wherein the connecting wires placed between the row wires and the second electrodes have connecting wires cut. 
     
     
       26. The image display according to  claim 23 , wherein the connecting wire is coupled to the row wire in a portion where the connecting wire traverses the row wire. 
     
     
       27. The image display according to  claim 26 , further comprising:
   a first driving circuit applying the first driving voltage to the column wire, wherein the resistance of the connecting wire is larger than an output impedance of the first driving circuit multiplied by  10 .     
     
     
       28. The image display according to  claim 26 , wherein the resistance value of the connecting wire multiplied by the electrostatic capacitance of the electron- emitter element is smaller than the horizontal scanning period of a displayed video signal.   
     
     
       29. The image display according to  claim 26 , wherein the resistance value of the connecting wire is smaller than the differential resistance of the operation region of the electron- emitter element.   
     
     
       30. The image display according  claim 1 , wherein the phosphor comprises a first phosphor layer, a second phosphor layer, and a third phosphor layer;
   the plurality of electron - emitter elements include a first electron - emitter element emitting electrons to the first phosphor layer, a second electron - emitter element emitting electrons to the second phosphor layer, and a third electron - emitter element emitting electrons to the third phosphor layer; and        a pixel displaying color images which is comprised of the first, second, and third electron - emitter elements.     
     
     
       31. The image display according to  claim 30 , wherein the first, second, third electron- emitters are coupled to the same row wire.