JP2002245939A - Manufacturing method of display device and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To materialize an integral gap retention member having a ventilation mechanism, easy to manufacture, and having sufficient strength for a gap reten tion member retaining a vacuum gap between a back surface panel including an electron source such as a field emission type and a front surface panel includ ing a phosphor body. SOLUTION: A display device is manufactured with a manufacturing method including a process of piling plural fibers 4 with alternately crossing, a process of applying pressure on the piled fibers 4 in the piling direction, and a process of heating the piled fibers 4 up to a temperature at which at least a surface of the fiber 4 melts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device utilizing electron emission into a vacuum, and more particularly to a structure of a display device which has good display characteristics and is easy to assemble, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A display device utilizing electron emission from an electron source into a vacuum (hereinafter referred to as an electron emission display device or a field emission display device) includes a Spindt type device proposed by CA Spindt et al. (See, for example, US Pat. No. 3,453,478,
No. 00-21305), a metal-insulator-metal (MIM) type, and a device utilizing an electron emission phenomenon by a quantum tunnel effect (also referred to as a surface conduction electron source, see Japanese Patent Application Laid-Open No. 2000-21305). ), And those utilizing the electron emission phenomena of diamond films, graphite films, and carbon nanotubes ("vacuum": Japanese version of Journal of Vacuum Society of Japan, Vol. 42, No. 8. (1999), pages 722-726) are known.

FIG. 16 is a diagram schematically showing an example of a conventional field emission display device. FIG. 16A is an exploded perspective view of the display device, and FIG. 16B is a sectional view of the assembled display device.

As shown in FIG. 16A, a field emission type display device comprises a back panel 1 having a substrate 6 preferably made of glass, alumina or the like and an electron source, and a material having light transmittance such as glass. And a front panel 2 having a phosphor is arranged to face each other. A sealing frame 30 made of glass or the like is provided between the back panel 1 and the front panel 2.
The sealing frame 30 is sealed to each of the back panel 1 and the front panel 2 with frit glass or the like. In the figure, the dotted line shown on the upper surface of the substrate 6
The position where the outer periphery of 0 hits is shown. The rear panel 1 is provided with an exhaust pipe 61, and the space surrounded by the respective main surfaces of the rear panel 1, the front panel 2, and the sealing frame 30 is evacuated to, for example, 10 ⁻⁵ to 10 ⁻⁷ Torr. Exhausted.

On the substrate 6 of the back panel 1, a cathode wiring (not shown) and a control electrode are formed, and the cathode wiring and the control electrode are insulated by an insulating layer 8. The rear panel 1 is provided with a cathode terminal 70 for applying a voltage to the cathode wiring and a control electrode terminal 50 for applying a voltage to the control electrode.

FIG. 17 is a diagram schematically illustrating the structure of a conventional field emission display device using a Spindt-type electron source. FIG. 17A is a plan view, and FIG.
It is sectional drawing in EE of 7 (a).

A cathode wiring 7 and a control electrode 5 are formed on a substrate 6 of the back panel 1 so as to cross each other. The cathode wiring 7 and the control electrode 5 are insulated from each other by an insulating layer 8.
The intersection area corresponds to one pixel, and in the intersection area, an electron source 100 is provided on the cathode wiring 7, and an opening is formed in the control electrode 5 and the insulating layer 8 so that the electron source 100 is exposed. 9 are provided. In Spindt-type electron sources,
The electron source 100 has a conical shape or a shape close thereto, and is also called an emitter cone. In this figure, one electron source 100 per pixel is used.
However, a plurality of electron sources 100 may be provided in an array for one pixel.

On the other hand, a phosphor 11, a black matrix 12, and an anode 10 are formed on the substrate 13 of the front panel 2 facing the back panel 1 so as to cover the phosphor 11. The phosphor 11 is separated by a black matrix 12 for each pixel.

Here, when a potential difference ΔV is generated between the electron source 100 electrically connected to the cathode wiring 7 and the control electrode 5, when the potential difference ΔV exceeds several tens of volts, the electron source 10
Electrons 14 are emitted from the tip of zero. A high voltage Ea is applied between the cathode wiring 7 and the anode 10, and the electrons 14 are accelerated toward the phosphor 11 provided on the front panel 2 by this voltage Ea to cause the phosphor 11 to emit light.

Since the energy of electrons required to emit light from the phosphor reaches about 6000 eV (eV = electron volt), a high potential difference of about 6 kV is applied between the back panel 1 and the front panel 2. For this reason, the rear panel 1
A gap of 1 mm or more is provided between the substrate and the front panel 2 to prevent dielectric breakdown between these substrates.

FIG. 18 is a perspective view schematically showing an example of the structure of a conventional field emission display device.

In the field emission display device, the gap between the back panel 1 and the front panel 2 is evacuated to a predetermined degree of vacuum and kept at a vacuum. It is necessary to prevent the front panel 2 from being crushed and bent. Therefore, the gap holding member 3 is arranged between the back panel 1 and the front panel 2 to hold a predetermined gap. Note that this figure is an enlarged view of the periphery of the pixel, and the sealing frame 30 and the like are omitted. This technique is discussed in, for example, JP-A-2000-21335 and JP-A-2000-285833.

[0013]

In a display device in which the gap between the back panel 1 having the electron source 100 and the front panel 2 having the phosphor 11 is kept in a vacuum, the gap between the back panel 1 and the front panel 2 is kept. A gap holding member 3 is required to withstand the stress caused by the atmospheric pressure between the two, and the gap holding member 3 is required. However, as the size of the panel increases, a large number of gap holding members 3 are required. Can be

Also, considering the exhaust, the gap holding member 3
It is necessary to provide a ventilation structure in the air.

A simple manufacturing method is required as much as possible.

[0016] Further, the strength is required to withstand the atmospheric pressure.

Further, it is required to make the height of the gap holding member 3 uniform in order to hold a predetermined gap.

Further, it is necessary to keep the assembling accuracy of the gap holding member 3 and the control electrode 5 high and to improve the working efficiency of the assembling.

[0019]

Means for Solving the Problems In order to solve the above problems, the method for manufacturing a display device of the present invention has the following features. (1) Manufacture of a display device including a back panel having an electron source, a front panel having a phosphor, and a gap holding member for holding a vacuum gap between the back panel and the front panel. A method, wherein the gap holding member has a plurality of fibers, and in forming the gap holding member, a step of alternately intersecting the plurality of fibers and stacking the plurality of fibers, and a stacking direction with respect to the stacked fibers. And heating the laminated fibers to a temperature at which at least the surface of the fibers melts.

[0020] Thereby, it is integrated and has a ventilation mechanism,
A gap holding member that is easy to manufacture and has sufficient strength is realized. (2) In (1), the pressure is applied by a device provided with a mechanism for regulating the movement of the means for applying pressure so that the height of the laminated fibers does not fall below a predetermined height.

Thus, the height of the gap holding member can be made uniform. (3) In any one of (1) and (2), a fiber whose outer layer has a melting point lower than that of the inner layer is used as the fiber, and the fiber is heated at a temperature lower than the melting point of the inner layer.

This makes it easy to make the height of the gap holding member uniform. (4) In any one of (1) to (3), a step of fixing a control electrode for controlling emission of electrons from the electron source to the gap holding member is included.

Thus, the assembly accuracy of the gap holding member and the control electrode can be kept high, and the working efficiency of the assembly can be increased.

The display device according to the present invention has the following features. (5) A display device comprising: a back panel having an electron source; a front panel having a phosphor; and a gap holding member for holding a vacuum gap between the back panel and the front panel. The gap holding member has a plurality of fibers that are alternately crossed and stacked, and the fibers are fused to each other and are in surface contact.

[0025] Thereby, it is integrated and has a ventilation mechanism,
A gap holding member that is easy to manufacture and has sufficient strength is realized. (6) In (5), the fiber is a fiber in which the melting point of the outer layer is lower than the melting point of the inner layer.

This makes it easy to make the height of the gap holding member uniform. (7) In any one of the constitutions (5) and (6), the area of the contact surface between the fibers is larger than the area of a circle having a diameter of 25% of the diameter of the fiber.

Thus, a gap holding member having a sufficient strength is realized. (8) In any one of the constitutions (5) to (7), the gap holding member is provided with a control electrode for controlling emission of electrons from the electron source.

Thus, the assembly accuracy of the gap holding member and the control electrode can be kept high, and the working efficiency of the assembly can be increased.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Here, an example in which a field emission type electron source is used as the electron source will be described.

FIG. 1 is a diagram conceptually illustrating a first display device according to the present invention. In this figure, the arrangement in the vicinity of the pixel of the display device is simply shown, and the sealing frame 3, the electron source 100 and the like are omitted.

The first display device has a back panel 1 and a front panel 2, and the back panel 1 and the front panel 2
The gap holding member 3 is disposed between the two. The gap holding member 3 has a lower portion on the rear panel 1 and an upper portion on the front panel 2.
To form a desired gap between the back panel 1 and the front panel 2. The gap holding member 3 can be fixed to one or both of the back panel 1 and the front panel 2. The gap between the back panel 1 and the front panel 2 is kept in a vacuum, and the gap holding member 3 has a function of holding the gap against stress received from the outside atmospheric pressure.

The gap holding member 3 is provided with an aggregate of fibers 4 having a substantially circular cross section.
Alternately intersect with each other at the intersection. The intersections are substantially aligned in the Z direction, and this portion serves as a support between the back panel 1 and the front panel 2. In this case, in order to sufficiently secure the strength of this equivalent support, it is desirable that the intersections of the fibers 4 make contact not at points but at surfaces. For this reason, although omitted in FIG. 1, the vicinity of the intersection of the fibers 4 is designed so as to make surface contact. Details will be described in Examples.

The arrangement of the gap holding member 3 can take various forms. Representative embodiments of these combinations will be described in the following embodiments, but only the embodiments described here do not realize the features of the present invention.

FIG. 2 is a diagram conceptually illustrating a second display device according to the present invention. As in FIG. 1, this figure simply shows the arrangement near the pixels of the display device.

The difference from the first display device shown in FIG. 1 is that the control electrode 5 for controlling the emission of electrons from the electron source 100 is formed on the insulating layer 8 of the back panel 1. Instead, it is fixed to the gap holding member 3 separately from the manufacturing process of the back panel 1 to form a gap holding member / control electrode assembly. That is, the feature is that the gap holding member 3 and the control electrode 5 are integrated. In this structure, the gap holding member 3 and the control electrode 5, which are the most important components, are integrated, so that the assembling accuracy can be kept high, the strength can be increased, and the working efficiency of the assembling can be increased.

The gap holding member 3 provides a desired gap between the rear panel 1 and the front panel 2 by bringing the control electrode 5 fixed to the lower part into contact with the rear panel 1 and the upper part into contact with the front panel 2. I have. The gap holding member / control electrode assembly can be fixed to one or both of the back panel 1 and the front panel 2. There are many forms in the shape and arrangement of the gap holding member 3 and the control electrode 5. Representative examples of these combinations will be described in the following examples,
The embodiments described herein are not the only ones that realize the features of the present invention.

The gap holding member 3 provided in each of the first and second display devices according to the present invention includes a plurality of fibers 4. Since the fibers 4 are alternately stacked, the gap holding member 3 has many gaps. This is a very effective structure for maintaining the entire display device in a vacuum and for evacuating the device in order to realize the vacuum. The strength of the gap holding member 3 is increased by contacting the intersections where the fibers 4 intersect with each other not with a point but with a surface. However, when the surface contact is realized, the area of the contact surface is X
It is desirable that the area is larger than the area of a circle having a diameter of 25% of the diameter of the fiber 4 when viewed from the plane of projection on the Y plane. When touching at a point, the area is substantially zero when the contact surface is viewed on the projection surface. <First Embodiment> FIG. 3 is a diagram for explaining a first embodiment of the present invention. In this figure, only the gap holding member of FIG. 1 for explaining the first display device is shown.

FIG. 4 is a sectional view taken along line AA of FIG. The fibers 4 are stacked alternately and intersected, and are fused to each other. At the intersections of the stacked fibers 4, the gap holding member 3 equivalently forms a support. Fiber 4
When a glass fiber having a diameter of 100 μm is used as
The post when not fused has a height of 100 μm multiplied by the number of crossed glass fibers, while the post when fused has a height of, for example, 80 μm multiplied by the number of crossed glass fibers. . Glass having an appropriate softening point is generally used as the fiber 4. However, even a heat-resistant glass material having a softening point exceeding 1000 ° C., such as quartz glass, can fulfill its role. This is because, in the present invention, the heat treatment temperature does not affect the temperature at which the rear panel 1 and the front panel 2 are formed because the gap holding member 3 can be manufactured in a process different from that of the rear panel 1 and the front panel 2. As the softening point of the fiber 4,
A glass having a softening point of at least 400 ° C. or higher is selected so that the gap holding member 3 is not softened and deformed in the process of assembling and connecting the members such as the back panel 1 and the front panel 2 to perform vacuum sealing. It is desirable to do.

FIG. 5 is a diagram for explaining an example of a method for manufacturing the structure shown in FIG. 100μ diameter as shown
The m fibers 4 are stacked as they are or alternately using a jig (not shown). Next, apply pressure 200 in the direction of the arrow.
And the whole fiber 4 is heated to a temperature higher than the softening point at which the surface of the fiber 4 melts, and is fused at the point where the adjacent fibers 4 come into contact. At this time, the timing of applying pressure and the timing of heating can be appropriately selected. By controlling the height of the gap holding member 3 with a jig, it is possible to maintain the entire gap holding member at a constant height. <Second Embodiment> FIG. 6 is a diagram for explaining a second embodiment of the present invention. In the figure, a fiber 4 is made of two kinds of glass materials concentrically. As in the first embodiment shown in FIG. 5, a plurality of fibers are alternately crossed and stacked using a jig or the like. Thereafter, pressure 200 is applied from the direction of the arrow in the figure and heating is performed. At this time, the timing of applying pressure and the timing of heating can be appropriately selected. The softening temperature of the outer layer 201 of the fiber is set lower than the softening temperature of the inner layer 202 of the fiber,
The heating temperature is set to the temperature in between. For example, when the softening temperature of the outer layer 201 of the fiber is 500 ° C. and the softening temperature of the inner layer 202 of the fiber is 700 ° C., the heating temperature is increased from 505 ° C. to 695% in order to soften the surface of the fiber 4.
Heat at an arbitrary temperature of ℃, for example, 550 ℃ for 30 minutes.

FIG. 7 is a sectional view of the gap holding member after heating in FIG. The inner layer 202 of the fiber is in direct contact with each other and the outer layer 201 of the fiber is fused around it.

Also in this embodiment, the height of the gap holding member in the Z direction can be controlled by devising a jig and tool. However, since the fiber 4 has a two-layer structure, the height is almost equal to that of the inner layer 202 of the fiber. The value is the sum of the diameters, and the accuracy is easy to achieve. <Third Embodiment> FIG. 8 is a diagram for explaining a third embodiment of the present invention. In this embodiment, two fibers 4 are installed in one or both directions of crossing each other. In this embodiment, the apparent cross section of the column formed in the Z direction becomes large, and the gap holding member 3 having high strength can be obtained. This also means that the latitude of the positional accuracy of the laminated fibers 4 is increased, and the structure is easy to manufacture. <Fourth Embodiment> FIG. 9 is a diagram for explaining a fourth embodiment of the present invention, and is a diagram for explaining an embodiment of a manufacturing method for realizing the present invention.

For example, a jig 203 in which a groove is formed on a heat-resistant inorganic material such as carbon, graphite or silicon nitride, silicon carbide, quartz glass, silicon, boron nitride, a high melting point metal alloy, and alumina by a diamond cutting tool or the like, a glass fiber 4 as shown in the figure, crossing each other. From above, a comb-shaped jig 204 is placed from above using a heat-resistant inorganic material that is the same as or different from the jig 203 and aligned with the groove. By heating all of the above components to an appropriate temperature, the fibers 4
These are fused together.

FIG. 10 is a sectional view taken along the line BB of FIG. This figure shows a state in which the fibers 4 are stacked. The fibers 4 are in contact with each other or slightly apart. A jig 204 is placed from above the fiber 4 in accordance with the groove.

FIG. 11 is a sectional view after heating at an appropriate temperature in FIG. The fibers 4 are deformed and fused together. At this time, the jig 203 and the jig 204 are completely engaged with each other, and a mechanism that enables the height of the entire laminated fiber to be a height determined by the depth of the groove of the jig 203 and the dimensions of the comb teeth of the jig 204 operates. It is easy to understand. That is, by regulating the movement of the means for applying pressure,
The pressure is applied by a device having a mechanism that prevents the height of the fiber from falling below a predetermined height.

Thus, the most important gap holding member 3
Can be determined by the jigs 203 and 204, and highly accurate processing can be performed. An advantage of the structure of the present invention is that even if there is a variation in how the individual fibers 4 are crushed, the function as the gap holding member 3 does not cause a serious problem. <Fifth Embodiment> FIG. 12 is a diagram for explaining a fifth embodiment of the present invention. In this embodiment, the second embodiment described with reference to FIG.
The control electrode 5 is connected to and integrated with the gap holding member 3 as in the display device of FIG.

FIG. 13 is a sectional view taken along the line CC of FIG. Here, as described with reference to FIG. 7, which is the second embodiment, the fiber 4 is concentrically formed on the outer layer 20 of the fiber.
1 and the inner layer 202 of the fiber having a two-layer structure, wherein the inner layer 202 of the fiber is selected to have a higher softening temperature than the outer layer 201 of the fiber, and the temperature between the two softening temperatures is selected. Shows the state after the heat treatment when pressure is applied while heat treatment is performed. The present embodiment is not limited to such a fiber having a two-layer structure, but may have the structure described in the first embodiment or the third embodiment or other structures.

In this embodiment, the control electrode 5 for controlling the emission of electrons from the electron source 100 comes into contact with the fiber 6 and is crushed and fused.

In this structure, since the gap holding member 3 and the control electrode 5, which are the most important components, are integrated, the assembly accuracy can be kept high, the strength can be increased, and the assembly work efficiency can be increased. I can do things. <Sixth Embodiment> FIG. 14 is a diagram for explaining a sixth embodiment of the present invention, and is a diagram for explaining a method of driving the display device of the present invention. In this figure, it is shown by an equivalent circuit.

In the display device of the present invention, a plurality of cathode wirings 7 extending in the y-axis direction are arranged in parallel in the x-axis direction, and control electrodes 5 extending in the x-axis direction are arranged in parallel in the y-axis direction. A matrix of rows and n columns is formed. X1, X
2,..., Xn indicate column numbers, and Y1, Y2,.
.., Ym indicate the line number. One or more electron sources are provided for each pixel arranged in a matrix. R,
G and B are green, blue and red pixels, respectively, and emit light corresponding to the respective colors from the phosphor.

Reference numeral 51 denotes a scanning circuit to which a synchronization signal 52 is input. The scanning circuit 51 is connected to the control electrode terminal 50 and the control electrode 5, selects a row, and applies a voltage to the control electrode 5 as a scanning signal. On the other hand, reference numeral 71 denotes a video signal circuit to which an image signal 72 is input. Video signal circuit 71
Is connected to the cathode terminal 70 and the cathode wiring 7, selects a column, and applies a voltage corresponding to the image signal 72 to the cathode wiring 7.

The potential difference between the electron source 100 electrically connected to the cathode wiring 7 and the control electrode 5 insulated from the cathode wiring 7 is determined at the pixel at the row and column position selected as described above. When the potential difference ΔV is equal to or greater than a certain value, electrons 14 are emitted from the electron source 100, and the electrons 14 emitted by the voltage applied to the anode 10 (not shown) are transferred to the phosphor 11. The pixel is accelerated to emit light from the phosphor of the pixel.

Accordingly, the control electrode 5 has a role of controlling the emission of electrons from the electron source together with the cathode wiring 7, and the control electrode 5 is provided on the rear panel 1 as in the first to third embodiments of the present invention. Driving is possible regardless of whether it is formed above or whether it is provided integrally with the gap holding member 3 as in the fifth embodiment of the present invention. <Seventh Embodiment> FIG. 15 is a view for explaining a seventh embodiment of the present invention. FIG. 15A is a plan view of the electron source of the present embodiment, and FIG. 15B is a cross-sectional view taken along line DD of FIG. 15A.

In this embodiment, the electron source 100 using carbon nanotubes is adopted as the electron source 100.
The structure and operation of this electron source 100 are similar to the Spindt-type electron source already described with reference to FIG.
As 0, rod-shaped carbon molecules called carbon nanotubes 102 are used in place of the emitter cone. As the name suggests, the carbon nanotube 102 has a diameter of several n.
m (nanometers = 10 ⁻⁹ m) to several tens of nm. Such a plurality of carbon nanotubes 102 are dispersed in a conductive paste, and the conductive paste is dropped on the upper surface of the cathode wiring 7 exposed from the opening 9 of the insulating layer 8 or the gap between the insulating layers 8. The conductive layer 103 is formed by curing the paste. Thus, the carbon nanotubes 102 are fixed on the surface of the conductive layer 103. The tip of the carbon nanotube 102 protrudes from the conductive layer 103, and emits electrons 14 according to the potential difference ΔV generated between this portion and the control electrode 5. The electron source 100 using the carbon nanotubes 102 can be formed by a simple process, and the number of tips for emitting electrons can be increased as compared with the Spindt type. Therefore, the field emission display using the carbon nanotubes 102 is advantageous for mass production and has an advantage that an image can be displayed brighter.

In this figure, one electron source 100 is formed for one pixel. However, it is preferable to form the electron source 100 in an array since more electrons can be emitted.

The anode 10 formed on the front panel 2 can be formed by evaporating aluminum or silver. When the anode 10 is formed of such a highly reflective metal thin film,
Of the light generated by the phosphor 11, the component propagating to the rear panel 1 side can be reflected to the substrate 13 side of the front panel 2,
The display image becomes brighter. Since such an effect is exhibited, the anode 10 formed of a metal thin film having a high reflectance is used.
Is called a metal back.

The anode 10 may be formed on the substrate 13 with the positions of the phosphor 11 and the anode 10 reversed, and the phosphor 11 may be formed thereon. However, in this case, a transparent conductive material is used for the anode 10.

The phosphor 11 can be formed using the same fluorescent material as a cathode ray tube known as a cathode ray tube. For example,
The phosphor 1 using Y2O2S: Eu, Sm for a pixel displaying red, ZnS: Cu, Au, Al for a pixel displaying green, and ZnS: Ag for a pixel displaying blue.
1 is formed. Each phosphor material exemplified here is described as “phosphor crystal: activator” with a colon (:) interposed therebetween. The activator determines the afterglow characteristics and the like of the phosphor 11 based on the concentration and type of the phosphor 11 and the firing (synthesis) conditions with the phosphor crystal. In addition, the surface of the phosphor 11 is coated with a pigment so that the phosphor 11 exhibits a black color or a color close thereto (reflection color) when no light is emitted. Without this pigment coating, the phosphor 11 would reflect a color close to gray, causing the display screen to shimmer.

The present invention has been described above by taking a display device using a field emission type electron source as an example. However, the present invention can be variously modified without departing from the spirit of the present invention. The display device can be applied to other types of display devices, such as a display device using a surface conduction electron source or a MIM type electron source, as long as the display device has a vacuum maintained between them.

[0059]

According to the present invention, the fibers 4 which are alternately crossed and stacked are heated while applying a force, so that the fibers 4 can be bonded to each other by surface contact.
A gap holding member that has a ventilation mechanism, is easy to manufacture, and has sufficient strength is realized.

The height of the gap holding member 3 can be made uniform by using fibers having different softening points in the inner and outer layers, or by using a device having a mechanism for regulating the movement of the means for applying pressure. Becomes easier.

Further, by providing the gap holding member 3 with the control electrode 5 and integrating it, the assembly accuracy of the gap holding member 3 and the control electrode 5 can be kept high, and the work efficiency of assembly can be increased.

[Brief description of the drawings]

FIG. 1 is a diagram for conceptually explaining a first display device according to the present invention.

FIG. 2 is a diagram conceptually illustrating a second display device according to the present invention.

FIG. 3 is a diagram illustrating a first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a diagram illustrating an example of a method of manufacturing the structure shown in FIG.

FIG. 6 is a diagram illustrating a second embodiment of the present invention.

FIG. 7 is a sectional view of the gap holding member after heating in FIG. 6;

FIG. 8 is a diagram illustrating a third embodiment of the present invention.

FIG. 9 is a diagram illustrating a fourth embodiment of the present invention, and is a diagram illustrating an embodiment of a manufacturing method for realizing the present invention.

FIG. 10 is a sectional view taken along line BB of FIG. 9;

11 is a sectional view after heating at an appropriate temperature in FIG.

FIG. 12 is a diagram illustrating a fifth embodiment of the present invention.

FIG. 13 is a sectional view taken along the line CC of FIG.

FIG. 14 is a diagram for explaining a sixth embodiment of the present invention;
FIG. 3 is a diagram illustrating a method for driving a display device of the present invention.

FIG. 15 is a diagram for explaining a seventh embodiment of the present invention.
FIG. 15A is a plan view of the electron source of this embodiment, and FIG.
FIG. 5B is a cross-sectional view taken along line DD of FIG.

FIG. 16 is a diagram schematically showing an example of a conventional field emission display device. FIG. 16A is an exploded perspective view of the display device, and FIG. 16B is a sectional view of the assembled display device.

FIG. 17 is a diagram schematically illustrating a structure of a conventional field emission display device using a Spindt-type electron source. FIG.
FIG. 17A is a plan view, and FIG. 17B is a cross-sectional view taken along the line EE of FIG.

FIG. 18 is a perspective view schematically showing an example of the structure of a conventional field emission display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front panel, 2 ... Back panel, 3 ... Gap holding member,
4 fiber, 5 control electrode, 6 substrate, 7 cathode wiring, 8 insulating layer, 9 opening, 10 anode, 11 phosphor, 12 black matrix, 13 substrate, 14 electron, Reference numeral 30: sealing frame, 50: control electrode terminal, 51: scanning circuit, 52: synchronization signal, 61: exhaust pipe, 70: cathode terminal,
71 video signal circuit, 72 image signal, 100 electron source, 102 carbon nanotube, 103 conductive layer,
200 ... pressure, 201 ... outer layer of fiber, 202 ...
Fiber inner layers, 203, 204 ... jig.

Claims (8)

[Claims] 1. A display device comprising: a back panel having an electron source; a front panel having a phosphor; and a gap holding member for holding a vacuum gap between the back panel and the front panel. The gap holding member has a plurality of fibers,
Forming the gap holding member, alternately intersecting the plurality of fibers and stacking the fibers, applying pressure in the stacking direction to the stacked fibers, and at least applying the pressure to the stacked fibers. Heating the fiber to a temperature at which the surface of the fiber melts. 2. The apparatus according to claim 1, wherein the pressure is applied by a device having a mechanism for restricting the movement of the means for applying pressure so that the height of the laminated fibers does not fall below a predetermined height. 6. The method for manufacturing a display device according to claim 1. 3. The fiber according to claim 1, wherein a fiber having a melting point of an outer layer lower than a melting point of an inner layer is used as the fiber, and the fiber is heated at a temperature lower than a melting point of the inner layer. The manufacturing method of the display device according to the above. 4. The method for manufacturing a display device according to claim 1, further comprising the step of fixing a control electrode for controlling emission of electrons from said electron source to said gap holding member. . 5. A display device comprising: a back panel having an electron source; a front panel having a phosphor; and a gap holding member for holding a vacuum gap between the back panel and the front panel. The display device, wherein the gap holding member has a plurality of fibers stacked alternately and intersected, and the fibers are fused to each other and are in surface contact. 6. The display device according to claim 5, wherein the fiber is a fiber in which the melting point of the outer layer is lower than the melting point of the inner layer. 7. The display device according to claim 5, wherein the area of the contact surface between the fibers is larger than the area of a circle having a diameter of 25% of the diameter of the fibers. 8. The display device according to claim 5, wherein said gap holding member is provided with a control electrode for controlling emission of electrons from said electron source.