JP2002008568A - Image forming device - Google Patents

Abstract

(57) [Problem] To provide an image forming apparatus having a configuration in which a spacer can be easily positioned at the time of sealing an envelope, and a spacer can be easily mounted on a rear plate and a face plate. SOLUTION: A rear plate provided with a plurality of electron-emitting devices, a face plate provided with an image forming member on which an image is formed by collision of electrons emitted from the electron-emitting devices, the rear plate and the face plate In an image forming apparatus having an outer frame that seals the periphery of the rear plate, and a spacer that is sandwiched between the rear plate and the face plate and that has a support structure at both ends, the image forming apparatus is disposed outside the electron emission element region of the rear plate. A positioning protrusion, a positioning groove provided in a support structure at one end of the spacer, and a slide groove provided in a support structure at the other end opposed to the positioning groove, The positioning groove and the slide groove are, with respect to the positioning protrusion,
By fitting each, positioning of the spacer,
It is configured to perform fixing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus provided in a vacuum vessel (envelope), and more particularly to a flat plate type image forming apparatus using a cold cathode electron-emitting device or the like.

[0002]

2. Description of the Related Art In recent years, an active matrix type liquid crystal has been used as a flat panel type image forming apparatus instead of a CRT. In addition, since the active matrix type liquid crystal is not a self-luminous type, it is necessary to perform display using a backlight. However, since the light use efficiency is low, a brighter image forming apparatus has been desired.

For this reason, electrons emitted from cold-cathode electron-emitting devices such as a plasma display, a field electron-emitting device, and a surface conduction electron-emitting device (for example, described in Japanese Patent Application Laid-Open No. 7-235255) are accelerated. Hit the phosphor,
2. Description of the Related Art A self-luminous image forming apparatus (field emission display) that emits light from a phosphor to perform display has been developed. These flat-panel image forming apparatuses have a large screen (large area) of several tens of inches, and at the same time, a highly accurate and easy assembling method is desired.

Conventionally, when assembling a flat panel type image forming apparatus such as a plasma display or a field emission display, a rear plate provided with electron-emitting devices and a face plate provided with a phosphor or the like which emits light by collision of electrons are provided. Need to be opposed to each other via an outer frame, and the inside of an envelope constituted by the rear plate, the face plate, and the support frame needs to be evacuated.

For this reason, it is necessary that the envelope has an anti-atmospheric pressure structure. Particularly, in an image forming apparatus having a large area, if the anti-atmospheric pressure support is to be realized, the thickness of the rear plate and the face plate is required. Must be very thick in order to avoid warpage and the like, and the feasibility is poor in terms of weight, cost, and the like. Therefore, in order to avoid this problem, spacers are arranged and fixed as pillars between the rear plate and the face plate, and the structure with improved atmospheric pressure resistance has been adopted.
The weight of the image forming apparatus is reduced.

[0006] Further, the spacer may be used for the purpose of keeping the distance between the rear plate and the face plate constant. For example, as shown in FIG.
In the conventional image forming apparatus disclosed in Japanese Patent No. 30776, a back plate 42 provided with a plurality of electron-emitting devices 45 is provided.
The front plate 41 faces and is disposed with the support frame 43 interposed therebetween, and the rear plate 42, the support frame 43, and the front plate 41
The envelope forms an envelope that is kept vacuum. And
A spacer 44 is disposed between the back plate 41 and the front plate 42 as an atmospheric pressure resistant structure. Here, a lattice-like spacer 44 is used, and each of the electron-emitting devices 45 is arranged so as to have one cell space. Further, low-melting glass 4
6 is used.

[0007]

As described above, when assembling using low-melting glass as a fixing material for the spacer, the working temperature of the low-melting glass is 400 to 500 ° C., so that alignment is performed at a considerably high temperature. This heat may cause the spacer to expand relatively to the rear plate and the face plate, resulting in deformation and displacement after welding. In a large-area image forming apparatus, a plurality of spacers are arranged according to the thickness of the rear plate and the face plate.
As the display area of the screen increases, the number of spacers also increases. Accordingly, the number of man-hours for installing the spacer in the assembly process of the image forming apparatus increases, which causes an increase in manufacturing cost.

The present invention has been made based on the above circumstances, and has a configuration in which the spacer can be easily positioned when the envelope is sealed, and the spacer can be easily mounted on the rear plate and the face plate. It is an object to provide an image forming apparatus.

[0009]

In order to achieve the above object, according to the present invention, there is provided a rear plate provided with a plurality of electron-emitting devices, and a rear plate disposed to face the rear plate and emitting electrons from the electron-emitting devices. A face plate provided with an image forming member on which an image is formed by the collision of the generated electrons, the rear plate, an outer frame sealing the periphery of the face plate, and both ends sandwiched between the rear plate and the face plate In the image forming apparatus having a spacer having a support structure, a positioning protrusion provided outside the electron-emitting device region of the rear plate, and a positioning groove provided in a support structure at one end of the spacer. A positioning groove and a slide groove disposed in a supporting portion structure at the other end facing the positioning groove, wherein the positioning groove and the slide groove are Relative-decided Me protrusions, respectively, by fitting the positioning of the spacers, characterized by being configured to perform fixing.

In this case, as an embodiment of the present invention, the positioning projections provided outside the electron-emitting device region of the rear plate may be on wirings outside the electron-emitting device region. Further, the positioning protrusions provided on the wiring outside the electron emission element region of the rear plate may be formed by lamination by a printing method, and a slide provided on a spacer having the support structure. The groove may slide only in the longitudinal direction of the wiring. In addition,
It is preferable that the image forming member is a phosphor or a cold cathode electron-emitting device. In this case, it is particularly preferable that the cold cathode type electron-emitting device is a surface conduction type electron-emitting device.

In such a configuration, the positioning protrusion provided outside the electron-emitting device region of the rear plate, the positioning groove provided in the support structure on one side of the spacer, and the positioning groove provided on the other side. By fitting the positioning groove and the slide groove provided on the support structure on the opposite side to the positioning protrusion, positioning and fixing of the spacer can be easily performed, thereby performing complicated alignment. This eliminates the necessity, and can reduce problems such as deformation and displacement even when the spacer expands and contracts with respect to the rear plate and the face plate. In an image forming apparatus having a large area, the number of spacers increases as the display area increases. However, there is an advantage that the image forming apparatus can be assembled with about 1/20 the number of spacers in the related art.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. FIG. 1 is a schematic perspective view of an image forming apparatus configured in a vacuum container (envelope) according to an embodiment of the present invention, in which a part of a panel is cut away to show an internal structure. ing. FIG.
Indicates a section A of the image forming apparatus used in FIG.
FIG. 5 is a perspective view showing an enlarged portion of the encircled portions B and C in FIG.

In the drawing, reference numeral 1 denotes a rear plate, 2 denotes a face plate, 3 denotes an outer frame, 4 denotes a spacer, 5 denotes a support member, 5a denotes a positioning groove, 5b denotes a slide groove, 6 denotes an upper wiring, 6a and 6b. Is a positioning projection formed on the upper wiring, 7 is a lower wiring, 8 is an electron-emitting device, 9 is a fluorescent film,
Denotes a metal back, 11 denotes an image forming unit, and 12 and 13 denote low-melting glass.

On the surface of the rear plate 1, N × M electron-emitting devices 8 are formed. (N and M are positive integers of 2 or more and are appropriately set according to the target number of display pixels. For example, in a display device for displaying high-definition television, N = 3000 and M = 1000 or more is desirable). This rear plate 1
For example, blue plate glass, high strain point glass (PD-200), or the like can be used.

The type of the electron-emitting device 8 constituting the electron source used in the present invention is not particularly limited as long as the characteristics such as the electron emission characteristics and the device size are suitable for the target image forming apparatus. Not something. That is, a thermionic emission device, a field emission device, a semiconductor electron emission device, a MIM type electron emission device, or a surface conduction type electron emission device can be used.

The surface conduction electron-emitting device shown in the embodiments described later is suitable for the present invention, and this will be briefly described below. FIG.
FIGS. 3A and 3B are schematic views showing the structure of a surface conduction type electron-emitting device 8, wherein FIG. 3A is a plan view and FIG. 3B is a cross-sectional view.

In FIG. 3, reference numeral 21 is a substrate, 22 and 23 are device electrodes provided on the substrate 21, 24 is a conductive thin film connecting the device electrodes 22 and 23 provided on the substrate 21, and 25 is a conductive thin film. The electron emission portion is formed locally on the conductive thin film 24. That is, the electron-emitting portion 25 performs a forming process on the conductive thin film 24 through the device electrodes 22 and 23, thereby locally destroying, deforming, or altering the conductive thin film 24, thereby providing an electrically high-resistance state. It was made. Further, an activation step for significantly improving the emission current is added. In this method, a voltage is applied to the conductive thin film 24 of the surface-conduction type electron-emitting device, and a current flows through the device, thereby causing the above-described electron-emitting portion 25 to emit electrons.

In FIG. 5A, reference numeral 4 is a spacer, 5 is a supporting member, 5a is a positioning groove, 6 is an upper wiring, 6
a is a positioning protrusion. Here, the positioning groove 5a is fitted into the positioning protrusion 6a. In FIG. 5B, 4 is a spacer, 5 is a support member, 5b is a positioning groove, 6 is an upper wiring, 6b is a positioning protrusion, and a slide groove 5b is fitted into the positioning protrusion 6b. Furthermore,
On the rear plate 1, M row-directional wirings 6 (generally referred to as an upper wiring) and N column-directional wirings 7 (also referred to as a lower wiring) are arranged in a simple matrix. I have.

On the lower surface of the face plate 2, an image forming section 11 composed of a fluorescent film 9 and a metal back 10 is formed. In addition, as the face plate 2, blue plate glass, high strain point glass (PD-200 manufactured by Asahi Glass) or the like can be used. In order to perform color display, phosphors of three primary colors of red, green, and blue used in the field of CRT are separately applied to a portion of the phosphor film 9. As shown in FIG. 4A, between the stripes of the phosphors R, G, and B,
A black conductive material 31 is provided. As described above, the purpose of providing the black conductive material 31 is to prevent the display color from being shifted even if the electron beam irradiation position is slightly shifted, to prevent reflection of external light, and to improve the display contrast. And preventing charge-up of the fluorescent film 9 by an electron beam. Although graphite is used as the main component of the black conductive material 31, any other material may be used as long as it is suitable for the above purpose.

The method of applying the three primary color phosphors R, G and B is not limited to the stripe arrangement shown in FIG. 4A. It may be a delta arrangement as shown, or another arrangement. When a monochrome display panel is formed, a monochromatic phosphor material may be used for the phosphor film 9, and the black conductive material 31 does not necessarily have to be used.

On the surface of the fluorescent film 9 on the rear plate 1 side, there is provided a metal back 10 known in the field of CRT. The purpose of providing the metal back 10 is to improve a light utilization rate by mirror-reflecting a part of the light emitted from the fluorescent film 9, to protect the fluorescent film 9 from collision with negative ions,
The function may be to function as an electrode for applying an electron beam acceleration voltage, or to function as a conductive path for the excited electrons of the fluorescent film 9. The metal back 10 was formed by forming the fluorescent film 9 on the face plate 2, then smoothing the surface of the fluorescent film 9, and vacuum-depositing Al thereon. When a fluorescent material for low voltage is used for the fluorescent film 9, the metal back 9 is not used.

A transparent electrode made of, for example, ITO may be provided between the face plate 2 and the fluorescent film 9 for the purpose of applying an acceleration voltage and improving the conductivity of the fluorescent film 9. In the figure, Dx1-Dxm and Dy1-D
yn and Hv are the display panel and the electric circuit (not shown)
Is a terminal for electric connection having an airtight structure provided for electrically connecting the terminal and the terminal. Dx1 to Dxm are the row wirings 6 of the multi-electron beam source, Dy1 to Dyn are the column wirings 7 of the multi-electron beam source, and Hv is the metal back 10 of the front plate.
And are electrically connected to each other.

The outer frame 3 is made of the same material as that of the rear plate 1 and the face plate 2, and has a vacuum container (envelope).
Is composed. Note that the outer frame 3 may be integrated with the rear plate 1 or the face plate 2,
The rear plate 1 and the face plate 2 need not be separate members. The outer frame 3 is a rectangular frame fixed to the rear plate 1 by an adhesive 12,
And supports the interval between the outer peripheral portions of the face plate 2 that is disposed to face.

Rear plate 1 and face plate 2
And a method of fixing the outer frame 3 supporting the above-mentioned interval between the outer peripheral portions, wherein stress and thermal expansion with other members are equivalent,
In addition, except that it is a bonding method that maintains airtightness,
In particular, it is not limited.

As a method of forming the protruding shape of the positioning protrusions 6a and 6b of the upper wiring 6, there are a transfer method, a resist method, an etching method and the like, and it is preferable to laminate printing by screen printing. In addition, the positioning protrusions 6a, 6b
May be located outside the electron emission region, and the installation position is not particularly limited as long as the position is such that electron emission is not hindered. Further, the positioning protrusion 6
Except that the shapes of a and 6b can be fitted into the positioning groove 5a, do not slide in the Y direction with the slide groove 5b, and can withstand thermal deformation, stress, and the like in a later step. There is no particular limitation.

The support member 5 may be made of a material such as glass or resin. The material must be able to withstand thermal deformation and atmospheric pressure resistance in a later process. There is no particular limitation except that the coefficients are equivalent, but preferably,
Ceramic is preferred. In addition, the support member 5 is not particularly limited as long as it has a shape and a size that do not hinder the conductance in a vacuum.

Further, the adhesive between the support member 5 and the positioning protrusion or the adhesive between the spacer 4 and the support member 5 is a material that can withstand thermal deformation and peeling in a later step. 1, face plate 2, spacer 4
Any material may be used as long as it satisfies conditions such as the same thermal expansion coefficient and a small amount of released gas, but among them, an inorganic adhesive is preferably used.

According to the above configuration, not only can the spacers be easily positioned, but also the spacers can be assembled at room temperature.

[0029]

Next, a more specific embodiment of the present invention will be described. In the following description, the drawings referred to in the above embodiment will be referred to as appropriate.

(Embodiment 1) This embodiment 1 has the same basic configuration as the image forming apparatus described in the above embodiment, and will be described with reference to FIGS. And Here, a surface conduction electron-emitting device is used as the electron-emitting device 8, a plurality of the electron-emitting devices 8 are formed on the rear plate 1, and a fluorescent film 9 is provided on the face plate 2, so that effective display is performed. A color image display device with an area of 10 inches and an aspect ratio of 3: 4 was prepared. First, an image display device of the present invention will be described with reference to FIG.

The configuration of the image forming apparatus itself is the same as that of the embodiment. That is, a face provided with a rear plate on which a plurality of electron-emitting devices are provided, and an image forming member disposed to face the rear plate and forming an image by collision of electrons emitted from the electron-emitting devices. An image forming apparatus comprising: a plate; an outer frame that seals around the rear plate and the face plate; and a spacer that is sandwiched between the rear plate and the face plate and that has a support structure at both ends. A positioning protrusion disposed outside the electron-emitting device region of the plate; a positioning groove disposed on one of the support structure; and a positioning groove disposed on the other side of the support structure opposite to the positioning groove. The slide grooves are fitted to the positioning projections, thereby positioning and fixing the spacer.

In the first embodiment, a high strain point glass is used for the rear plate 1, the face plate 2 and the outer frame 3, the ceramic is used for the support member 5, and the outer frame 3 is used.
Low-melting glass was used for the adhesives 12 and 13 for adhering to the rear plate 1 and the face plate 2. Then, by bonding the rear plate side and the face plate side so as to face each other, a vacuum airtight container (envelope) for maintaining the inside of the display panel at a vacuum is formed. Note that an inorganic adhesive was used as an adhesive between the outside of the electron emission element region of the rear plate 1 and the support member 5, and between the spacer 4 and the support member 5.

Next, a method of manufacturing the image forming apparatus according to the first embodiment will be described step by step. Step-1 (formation of a rear plate): Two auxiliary holes are formed in a desired place outside the image display area in advance, and a silicon oxide film is formed on the glass substrate 21 by a sputtering method. The device electrodes 22 and 23 were formed on the substrate. next,
The lower wiring 7 was formed by screen printing, an interlayer insulating layer was formed between the lower wiring 7 and the upper wiring 6, and the upper wiring 6 was further formed. Also, it is fitted with a support member that supports the spacer.

Next, screen printing was repeated to a desired thickness at a position outside the image display of the upper wiring, thereby forming positioning protrusions 6a and 6b of the upper wiring. The lower wiring 7 and the upper wiring 6 are formed so as to be connected to the device electrodes 22 and 23, and then the conductive thin film 24 is formed by a sputtering method, and then patterned to have a desired form, so that the rear plate 1 is formed. Configured. Step-2 (creation of face plate 2): Phosphors R, G, B and black conductive material 31 were formed on a glass substrate by a printing method. By performing a smoothing process on the inner surface of the fluorescent film 9 and then depositing Al using a vacuum deposition method to form a metal back 10, the face plate 2 is formed.
Was configured. Next, in order to adhere to the outer frame 3, using a dispenser, a low-melting glass as the adhesive 13 is applied in a frame shape so as to surround the periphery, and pre-treatment (temporary firing: 380 ° C., 10 minutes). Note that LS-3081 manufactured by NEC Corporation was used as a paste for bonding the low melting point glass. Step-3 (creation of outer frame 3): A glass substrate is cut into a desired thickness and size, and the finished outer frame 3 is fixed to the rear plate 1 by a dispenser as an adhesive 12. Was applied to one surface of the outer frame 3 and pre-treated (temporary firing: 380 ° C., 10 minutes). Note that LS-3081 manufactured by NEC Corporation was used as a paste for bonding the low melting point glass. Step-4 (creation of the positioning groove 5a, slide groove 5b, and spacer positioning groove 18 of the support member 5): A photo-veil of the positioning groove 5a of the support member 5 processed into a desired size and thickness is formed on a rear plate. The wiring surface side of the support member was cut to form the positioning groove 5a of the support member 5 so that the positioning protrusion 6a on the upper wiring 1 could be fitted. Then, the photoveil of the slide groove 5b of the support member 5 is processed to a desired size and thickness, and the wiring surface of the support member is fitted so that it can be fitted with the positioning protrusion 6b on the upper wiring of the rear plate 1. The side was cut to form a positioning groove 5b of the support member 5. Also, a groove 18 for positioning the spacer was formed. Step 5 (spacer assembly): Step 4
The spacer was inserted into the spacer positioning groove 18 of the support member 5 prepared in the above, and the spacer was assembled using Aron Ceramic D manufactured by Toa Gosei Co., Ltd. The spacer height is 2 mm, so that the distance between the rear plate 1 and the face plate 2, that is, the distance between the electron source and the phosphor 6 is maintained at about 2 mm in the image display device of the embodiment. Subsequently, the positioning groove 5a and the positioning protrusion 6a of the support member 5, and the slide groove 5b and the positioning protrusion 6b were fitted to each other.

Next, the supporting member 5 integrated with the spacer 4
The positioning groove 5a is fitted with the positioning protrusion 6a of the upper wiring, and the slide groove 5b of the support member 5 is fitted with the positioning protrusion 6b of the upper wiring, whereby the spacer is assembled. Next, the support member 5 was fixed to the outside of the electron emission element region of the rear plate 1 using Aron Ceramic D manufactured by Toa Gosei Co., Ltd., and the longitudinal displacement of the spacer 4 was corrected. Step-6 (sealing): Next, the outer frame 3 created in step-3 is arranged on the rear plate 1 created in step-5, and the outer frame 3 and the face plate 2 are heated at a temperature of 420 ° C. so,
Pressure sealing was performed. Step-7: The atmosphere in the airtight container completed as described above is evacuated by a vacuum pump through an exhaust pipe (not shown), and after reaching a sufficient degree of vacuum, terminals Dx1 to Dxm outside the container. Then, a voltage was applied to the electron-emitting device through Dr1 to Dyn to form a conductive thin film of the electron-emitting portion, and after this step, an activation step was performed to form an electron-emitting portion. Furthermore, after the end of a series of steps, baking was performed at a temperature of 250 ° C. for 10 hours. Step-8: Next, by evacuating to a degree of vacuum of about 10-7 Pa at room temperature and heating the exhaust pipe with a gas burner,
It sealed and sealed the airtight container. Finally, gettering was performed by a high-frequency heating method in order to maintain the degree of vacuum after sealing.

In the image forming apparatus of the present invention completed by the above-described steps, each of the electron-emitting devices 9 is connected to the external terminals Dx1 to Dx by a signal generating means (not shown).
A scanning signal and a modulation signal are applied through m and Dy1 to Dyn, respectively, to emit electrons, and a high voltage of several KV or more is applied to the metal back 11 or the transparent electrode (not shown) through the high voltage terminal Hv. And
When an image was displayed by accelerating the electron beam and colliding it with the fluorescent film 11 to excite and emit light, a highly reliable image display device was obtained without deterioration of the image due to slow leak or displacement.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described. The second embodiment relates to an image forming apparatus of the second structure mode, except that the shape of the positioning protrusion of the upper wiring and the shape of the positioning groove of the support member are changed. It is almost the same. Therefore, only different points from the first embodiment will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

FIGS. 6 (a) and 6 (b) show the positioning groove of the support member 5 of the airtight container of the image forming apparatus according to the second embodiment of the present invention and the fitting portion of the positioning protrusion of the upper wiring 6. FIG. An enlarged view is shown. That is, reference numeral 4 denotes a spacer, 5 denotes a support member, 5c denotes an arch-shaped groove, 6 denotes an upper wiring, and 6c denotes an arch-shaped protrusion.

As shown in FIGS. 6A and 6B, the positioning groove of the support member 5 is an arch-shaped groove 5c cut into an arch shape. In the first embodiment, the positioning groove 5a In the second embodiment, both grooves are formed in an arch shape. Next, the spacer 4 is inserted into the spacer positioning groove 18 of the support member 5,
The spacer was assembled using Aron Ceramic D manufactured by Toa Gosei Co., Ltd. Subsequently, as shown in FIG. 6, the shape of the positioning protrusion of the upper wiring 6 was also printed in an arch shape by a required printing technique, thereby forming the arch-shaped protrusion 6c.

Next, the positioning groove 5c of the support member 5 and the positioning protrusion 6c were fitted. Then, the support member 5 was fixed to the outside of the electron emission element region of the rear plate 1 using Aron Ceramic D manufactured by Toa Gosei Co., Ltd., and the longitudinal displacement of the spacer 4 was corrected.

As described above, an airtight container (envelope) was prepared in the same manner as in Example 1. Further, when an image was displayed in the same manner as in Example 1, an image display device with high reliability was obtained without deterioration of the image due to slow leak or displacement.

[0042]

Since the present invention is configured as described above, the following functions and effects can be obtained.

That is, in the image forming apparatus of the present invention, the positioning protrusion provided outside the electron-emitting device region of the rear plate, the positioning groove provided on one of the support structures of the spacer, and the positioning groove are opposed to each other. On the side to be fixed, the slide grooves provided on the other support structure are fitted to each other, so that positioning and fixing of the spacers are performed, thereby eliminating the need for complicated alignment. The displacement of the plate due to thermal expansion and deformation was also reduced.

In a large-area image forming apparatus,
As the display area increases, the number of spacers also increases, but it is still possible to assemble with about 1/20 the number of spacers in the related art.

[Brief description of the drawings]

FIG. 1 is a perspective view of an image forming apparatus according to an embodiment and a first embodiment of the present invention.

FIG. 2 is a sectional view of a main configuration of the apparatus of FIG.

FIGS. 3A and 3B are diagrams showing the configuration of a cold cathode surface conduction electron-emitting device used in the apparatus of FIG.

FIGS. 4A and 4B are diagrams showing examples of a fluorescent film used in the apparatus of FIG.

FIG. 5 is a configuration diagram of a spacer and a support member of FIG. 1;

FIG. 6 is a sectional view of a main configuration of an image forming apparatus according to a second embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a conventional image forming apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rear plate 2 face plate 3 outer frame 4 spacer 5 support member 5 a positioning groove 5 b slide groove 5 c arched groove 6 upper wiring 6 a, 6 b, 6 c positioning protrusion 7 lower wiring 8 electron-emitting device 9 fluorescent film 10 metal back 11 image Forming part 12, 13 Low melting point glass 14, 15, 16, 17 Aron ceramic D 18 Spacer positioning groove 21 Substrate 22, 23 Element electrode 24 Conductive thin film 25 Electron emitting part 31 Black conductive material 41 Front plate 42 Back plate 43 Support frame 44 Spacer 45 Electron emission element 46 Low melting glass

Claims (6)

[Claims] 1. An image forming apparatus comprising: a rear plate provided with a plurality of electron-emitting devices; and an image forming member disposed to face the rear plate and configured to form an image by collision of electrons emitted from the electron-emitting devices. An image forming apparatus comprising: a face plate, a rear plate, an outer frame for sealing the periphery of the face plate, and a spacer sandwiched between the rear plate and the face plate and having a support structure at both ends. A positioning protrusion disposed outside the electron-emitting device area of the plate; a positioning groove disposed in a support structure at one end of the spacer; and a support structure at the other end opposed to the positioning groove. With a slide groove,
The image forming apparatus is characterized in that the positioning groove and the slide groove are fitted to the positioning protrusions to position and fix the spacer. 2. The image forming apparatus according to claim 1, wherein the positioning projection disposed outside the electron-emitting device region of the rear plate is formed on a wiring outside the electron-emitting device region. apparatus. 3. The image according to claim 1, wherein the positioning protrusions provided on the wiring outside the electron-emitting device region of the rear plate are formed by lamination by a printing method. Forming equipment. 4. The image forming apparatus according to claim 1, wherein the slide groove provided on the spacer having the support structure slides only in the longitudinal direction of the wiring. . 5. The image forming apparatus according to claim 1, wherein said image forming member is a phosphor. 6. The image forming apparatus according to claim 1, wherein said image forming member is a cold cathode electron-emitting device.