JPH09283059A - Envelope for image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device and an envelope used in these devices capble of performing a good seal of all spacers without taking a surplus time and cost, even when a warp and wave are provided in a face plate and rear plate, and having a sufficient atmospheric pressure resistance structure without worsening a display quality. SOLUTION: In an envelope comprising an outer frame 802 enveloping the periphery of a face plate 806 and real plate 801 and a spacer 809 arranged between both the plates as an atmospheric pressure resistant support structure, a thickness of at least one of first glass 800 formed between the spacer 809 and the face plate 806 or frit glass 800 formed between the spacer 809 and the rear plate 801 is changed in accordance with a distance between the face plate 806 and the rear plate 801.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat image display device using an electron source and an envelope used for the same, and in particular, an outer frame and an atmospheric pressure resistant spacer using frit glass (low melting glass powder). The present invention relates to a sealed flat image display device and an envelope used for them.

[0002]

2. Description of the Related Art Generally, in an image display device using electrons, an envelope consisting of a face plate, a rear plate and an outer frame for maintaining a vacuum or reduced pressure atmosphere, an electron source for generating electrons and a driving circuit therefor, An image forming member having a phosphor or the like that emits light upon collision, an accelerating electrode for accelerating electrons toward the image forming member, and a high voltage power source thereof are required. Further, in an image display device using a flat envelope such as a thin image display device, a spacer is often used as an atmospheric pressure resistant structure (for example,
JP-A-2-299136). Usually, the face plate, the rear plate and the outer frame are sealed by firing the applied frit glass (low melting point glass powder) paste to produce an envelope. Similarly, the spacer is often fixed by frit glass.

[0003]

However, the manufacturing method of the envelope including the image display device of the conventional example has the following problems. In other words, the conventional frit glass paste coating / firing envelope will not cause any problems if the face plate or rear plate is flat, but if there is warp or undulation that cannot be ignored, defective sealing of the spacers will occur. Therefore, there is a drawback that the atmospheric pressure resistance is not sufficient.

An example of this envelope is shown in FIG. 12 (cross-sectional view). 131 is a face plate, 132 is a rear plate, 133 is an outer frame, 134 is a spacer, and 135 is frit glass. Since both the face plate and the rear plate are warped in this way, if a spacer having the same height and a frit having the same thickness are used, the spacer in the central portion floats in the air. Therefore, in the exhaust process to be performed later, the spacer may fall down, and in the worst case, the structure may not have the atmospheric pressure resistance, so that the envelope may be damaged (implosion), and the reliability is significantly reduced.

In order to prevent this, the warp / waviness of the face plate and the rear plate should be measured in advance, and a spacer having a height corresponding to the distance between the face plate and the rear plate should be arranged. Costly and impractical. Another method could be to make the frit thick enough in all the spacers so that the spacers do not float in the air, but if the distance between the face plate and rear plate is short, the frit will be crushed to the side. In the case of the image display device, the electron source and the phosphor are covered, so that the display quality is significantly deteriorated.

In view of the above-mentioned drawbacks of the prior art, the present invention enables good sealing of all spacers without extra time and cost even if the face plate or rear plate is warped or undulated. It is an object of the present invention to provide an image display device which is capable of achieving a sufficient atmospheric pressure resistant structure without deteriorating the display quality, and an envelope used for these devices.

[0007]

That is, according to the present invention, a face plate, a rear plate arranged so as to face the face plate, and an outer frame surrounding the circumference between the face plate and the rear plate. And a spacer disposed between the face plate and the rear plate as an atmospheric pressure resistant support structure, and the outer frame and the spacer are made of frit glass on the two plates to maintain a vacuum inside. In the sealed envelope, at least one of the frit glass formed between the spacer and the face plate or the frit glass formed between the spacer and the rear plate has a thickness of the face plate and the rear plate. The present invention relates to an envelope characterized by being changed according to a distance between plates.

Further, according to the present invention, a face plate, a rear plate arranged to face the face plate, an outer frame surrounding the circumference between the face plate and the rear plate, and an atmospheric pressure resistant support structure. An enclosure which comprises a spacer disposed between the face plate and the rear plate as a body, and the outer frame and the spacer are sealed to the two plates with frit glass in order to maintain a vacuum inside. In the manufacturing method of the container, the step of measuring the undulation / warpage of the face plate and the rear plate to obtain the distance between the face plate and the rear plate at the arrangement position of the spacer, and the distance between the face plate and the rear plate. And changing the thickness accordingly to form the frit glass at the spacer placement position. The method of manufacturing of the envelope to symptoms.

When at least one of the face plate and the rear plate has a warp or undulation, the distance between the face plate and the rear plate is not constant. If the spacers and frit glass of the same height are used for sealing as they are, the spacer in the center part will float in the air, but according to the distance between the face plate and the rear plate, increase the thickness of the frit glass at a place where this distance is wide. If the frit glass is thinly formed in the narrow space, the spacer in the central portion can be sealed without floating in the air. Therefore, it is possible to satisfactorily seal all the spacers, and it is possible to manufacture an envelope having a sufficient atmospheric pressure resistant structure without deteriorating the display quality.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The envelope of the present invention can be used in a flat image display device (flat panel display) that requires an atmospheric pressure resistant structure, and preferably the face plate of the envelope. It is used in an image display device in which a phosphor and an electron accelerating electrode are formed on a rear plate and an electron source is formed on a rear plate. This electron source is preferably a surface conduction electron-emitting device.

An image display apparatus using a surface conduction electron-emitting device, to which the present invention is most preferably used, will be described with reference to FIGS. 1 and 2 as an example of an embodiment. FIG. 2 is a partially cutaway perspective view of the image display device of the present invention. Here, the face plate 806, the rear plate 801, and the outer frame 802 constitute an envelope 808, and the inside is 1 × 10 ⁻⁵ to 1 × 10 ⁻⁷ torr.
The degree of vacuum is maintained, and the spacer 809 is arranged as an atmospheric pressure resistant structural member for holding the face plate 806 and the rear plate 801 substantially in parallel.

The rear plate is usually a blue plate (soda lime)
Glass, soda lime glass having SiO ₂ formed on its surface, or the like is used as a substrate, and an electron-emitting device 704 and wirings 702 and 703 for supplying a signal for driving the electron-emitting device are formed thereon. On the other hand, the face plate is
Usually, the above-mentioned glass or the like is used as a substrate, and a fluorescent film 804 made of a fluorescent substance or the like and a metal back 805 as an electron acceleration electrode are formed on the inner surface of the glass substrate 803. Frit glass 80 between the rear plate and spacer
0a, b, c are connected, and the face plate and the spacer are connected by a frit glass (not shown). The height of the frit glass is changed according to the distance between the face plate and the rear plate. The electrons emitted from the electron-emitting device are accelerated by the high voltage applied to the metal back, collide with the phosphor, and cause the phosphor to emit light. A conductive layer may be provided between the glass substrate and the black stripe (black matrix) and the phosphor.

FIG. 1 is a sectional view taken along the line AA 'of this apparatus. As shown in FIG. 1a, a face plate 806 and a rear plate 80 are provided.
If both 1 warp, the distance between the face plate and the rear plate is not constant. If the spacers and frit glass having the same height are used for sealing as they are, the spacers in the central portion float in the air. Therefore, as shown in FIG. 1b, when the thickness of the frit glass 800 is changed according to the distance between the face plate and the rear plate, even if the outer frame 802 and the spacer 809 having the same height are used, the spacer in the center part is left in the air. Can be sealed without floating.

In manufacturing such an envelope, the step of measuring the swelling / warping of the face plate and the rear plate to obtain the distance between the face plate and the rear plate at the position where the spacer is arranged, and the distance between the plates are determined. Can be achieved by performing a step of changing the thickness and forming the frit glass at the spacer arrangement position.

That is, the waviness / warpage of the face plate and the rear plate is measured by using, for example, a surface roughness meter (stylus electric measuring instrument), an optical z-axis length measuring device (CCD autofocus type), or the like. Therefore, the distance between the face plate and the rear plate where the spacers are arranged can be easily obtained. Then, by using a dispenser or the like, the frit glass can be formed at the spacer arrangement position by changing the thickness according to the distance between the plates.

As described above, by setting the thickness of the frit glass to a thickness that matches the gap between the sealing portions, all the spacers can be sealed well without extra time and cost, and sufficient. A highly reliable envelope having a high atmospheric pressure resistant structure can be obtained.

The shape of the spacer used in the present invention does not have to be a flat shape as shown in FIG. 2, and a shape such as a cross shape or a cylindrical shape may be used as long as it does not interfere with the electron beam. it can. The location of the spacer can be set as appropriate, but it is preferable to install it between the wiring of the rear plate and a black stripe (black matrix) described later on the face plate as shown in FIG. 2 because it does not hinder the display. Is. The number of spacers can be appropriately selected so that the face plate and the rear plate are held substantially parallel to each other to form an atmospheric pressure resistant structure. For sealing the spacers, for example, firing is performed in the atmosphere or nitrogen in the range of 400 to 500 ° C. for 10 minutes or more. As a result, it is possible to satisfactorily seal all the spacers,
A highly reliable image display device having a sufficient atmospheric pressure resistant structure is manufactured.

Further, FIG. 5 schematically shows the fluorescent film formed on the face plate of the image display device of FIG. In the case of monochrome, the fluorescent film 804 can be composed of only the fluorescent material. In the case of color display, a non-light emitting portion 901 is provided between the necessary three primary color phosphors 902 in order to make the color mixture and the like inconspicuous. It is preferable that the non-light-emitting portion be a black body because a decrease in contrast due to reflection of external light can be suppressed. The pattern of the non-light-emitting portion is preferably a stripe shape or a matrix shape according to the pixel arrangement.

As a method of applying the fluorescent material to the glass substrate 803, a precipitation method, a printing method, a slurry method or the like can be adopted regardless of whether it is monochrome or color. Fluorescent film 804
Is usually provided with a metal back 805.
In the case of color, it is necessary to associate each color phosphor with the electron-emitting device, and sufficient alignment is indispensable.

The electron-emitting device used is not limited, and a surface conduction electron-emitting device, a thermoelectron source and a cold cathode electron source can be used, but the surface conduction electron-emitting device is particularly preferable. The flat surface conduction electron-emitting device as shown in FIG. 3 and the vertical surface conduction electron-emitting device as shown in FIG. 4 can be used. 3a is a plan view, FIG.
b is a sectional view, 301 is a substrate, 302 and 303 are device electrodes, 304 is a conductive thin film, and 305 is an electron emitting portion.
In FIG. 4, 421 is a step forming portion, which is a substrate 401,
The device electrodes 402 and 403, the conductive thin film 404, the electron emission portion 405, and the like. Both the flat surface conduction electron-emitting device and the vertical surface conduction electron-emitting device can be manufactured by known methods.

The image display device shown in FIG. 2 has a simple matrix arrangement. This is schematically shown in FIG. In FIG. 6, reference numeral 801 is a substrate, and 702.
Denotes an X-direction wiring, and 703 denotes a Y-direction wiring. 704 is a surface conduction electron-emitting device, and 705 is a connection. Note that the surface conduction electron-emitting device 704 may be either of the above-mentioned flat type or vertical type. m X-direction wires 7
02 is composed of Dx1, Dx2, ..., Dxm,
It can be made of a conductive metal or the like formed by a vacuum deposition method, a printing method, a sputtering method, or the like. The material, thickness, and width of the wiring are appropriately designed. The Y-direction wiring 703 is Dy
1, Dy2, ..., Dyn, consisting of n wires, X
It is formed similarly to the direction wiring 702. An interlayer insulating layer (not shown) is provided between the m X-directional wirings 702 and the n Y-directional wirings 703 to electrically separate them (m and n are both positive). Integer).

A pair of electrodes (not shown) constituting the surface conduction electron-emitting device 704 are electrically connected by m X-direction wirings 702, n Y-direction wirings 703 and a connecting wire 705 made of a conductive metal or the like. Has been done.

A scanning signal applying means (not shown) for applying a scanning signal for selecting a row of the surface conduction electron-emitting devices 704 arranged in the X direction is connected to the X-direction wiring 702. On the other hand, a modulation signal generating means (not shown) for modulating each column of the surface conduction electron-emitting devices 704 arranged in the Y direction according to an input signal is connected to the Y-direction wiring 703. The driving voltage applied to each electron-emitting device is supplied as a difference voltage between the scanning signal and the modulation signal applied to the device. In the above structure, individual elements can be selected and driven independently by using simple matrix wiring.

Next, a configuration example of a drive circuit for performing television display based on an NTSC television signal on a display panel configured by using an electron source having a simple matrix arrangement will be described with reference to FIG. . In FIG. 7, 1
Reference numeral 01 is a display panel, 102 is a scanning circuit, 103 is a control circuit, and 104 is a shift register. Reference numeral 105 is a line memory, 106 is a synchronizing signal separation circuit, 107 is a modulation signal generator, and Vx and Va are DC voltage sources.

In the image display device of the present invention having such a structure, each electron-emitting device has a terminal Do outside the container.
By applying a voltage via x1 to Doxm and Doy1 to Doyn, electron emission occurs. High voltage terminal H
A high voltage (several k to several tens kV) is applied to the metal back 805 or the transparent electrode (not shown) via v to accelerate the electron beam. The accelerated electrons collide with the fluorescent film 804 and emit light to form an image.

The configuration example of the image display device described here is an example, and various modifications can be made based on the technical idea of the present invention. The input signal is not limited to the NTSC system, but may be a PAL or SECAM system, or a TV signal (for example, a MUSE system or other high-definition TV) system including a larger number of scanning lines. .

Furthermore, the present invention can be applied to an image display device provided with a ladder-type electron source. This will be described with reference to FIGS. 8 and 9. FIG. 8 is a schematic diagram showing an example of a ladder-type electron source. In FIG. 8, 11
Reference numeral 0 is an element substrate (rear plate), and 111 is an electron emitting element. Dx1 to Dx10 of 112 are electron-emitting devices 1
11 is a common wire connected to 11. Electron-emitting device 111
Are arranged in parallel in the X direction on the substrate 110 (this is called an element row). A plurality of the element rows are arranged to constitute an electron source. By applying a drive voltage between the common wires of each element row, each element row can be driven independently. That is, a voltage equal to or higher than the electron emission threshold is applied to an element row that wants to emit an electron beam, and a voltage equal to or lower than the electron emission threshold is applied to an element row that does not emit an electron beam. The common wirings Dx2 to Dx9 between the element rows are
For example, Dx2 and Dx3 may have the same wiring.

FIG. 9 is a schematic view showing an example of the structure of a panel in an image display device provided with a ladder-type electron source. 120 is a grid electrode, 121 is a hole for passing electrons, and 122 is Dox1, Dox2, ... Do.
It is a terminal outside the container made of xm. Reference numeral 123 denotes a container external terminal made of G1, G2, ..., Gn connected to the grid electrode 120. In FIG. 9, the same parts as those shown in FIGS. 2 and 8 are designated by the same reference numerals as those shown in these figures. The image display device shown here,
A major difference between the image display devices with the simple matrix arrangement shown in FIG. 2 is whether or not the grid electrode 120 is provided between the element substrate (rear plate) 110 and the face plate 806.

The grid electrode 120 modulates the electron beam emitted from the surface conduction electron-emitting device, and allows the electron beam to pass through a striped electrode provided orthogonal to the ladder-shaped element rows. Therefore, one circular opening 121 is provided corresponding to each element.
The shape and installation position of the grid are not limited to those shown in FIG. For example, a large number of passage openings may be provided in the form of a mesh as openings, and a grid may be provided around or near the surface conduction electron-emitting device.

The external terminal 122 and the grid external terminal 123 are electrically connected to a control circuit (not shown). In the image display device of this example, the modulation signals for one line of the image are simultaneously applied to the grid electrode columns in synchronization with the sequential driving (scanning) of the element rows one by one. This allows
The irradiation of each electron beam to the phosphor can be controlled to display an image line by line.

In the case of the image display device provided with such a ladder-type electron source, the spacers are arranged in the region of the grid where there are no holes for allowing electrons to pass, and the same process as in the manufacture of the image display device described above. It can be manufactured as described above.

The image display device of the present invention may be used as a display device for television broadcasting, a display device such as a television conference system or a computer, and also as an image display device as an optical printer constituted by using a photosensitive drum or the like. Can be used.

[0033]

EXAMPLES The present invention will be described in more detail below with reference to examples. [Embodiment 1] An envelope manufactured by using a face plate and a rear plate having a warp will be described with reference to FIG. The face plate and rear plate used here are 150 mm × 200 mm, the outer frame has a height of 4 mm, and the spacer has a height of 3.8 mm × a length of 80 mm. In FIG. 10 a, 141 is a face plate, 1
42 shows a cross section of the rear plate, and in FIG.
141 is a face plate, 142 is a rear plate, 1
43 is an outer frame, 144 is a spacer, and 145 is frit glass. Although a large number of spacers are arranged at 15 mm intervals, only three spacers are shown (the same applies to the following examples).

First, the waviness / warpage of the face plate and the rear plate where the spacers are arranged was measured using a surface roughness meter (stylus electric measuring instrument). If the spacer is placed exactly in the middle of the face plate and the rear plate, between the upper surface of the spacer and the face plate,
The ratio of the distance between the lower surface of the spacer and the rear plate is 3: 5: 3 (120 μm: 200 μm: 12) at the arrangement positions of the spacers 144a, 144b, 144c.
0 μm). Therefore, a frit glass paste (a low melting point glass powder mixed with an organic solvent and a binder) is applied by a dispenser so that the thickness of the frit glass is also 3: 5: 3, and the frit glass paste is baked in the air to form an envelope. Was produced. The spacer did not fall over in the subsequent exhaust process, and a highly reliable envelope having a sufficient atmospheric pressure resistant structure could be manufactured.

[Embodiment 2] This embodiment is different from Embodiment 1 except that a phosphor and an electron accelerating electrode are formed on a face plate and an electron source is formed on a rear plate.
An image display device as shown in FIG. 2 was manufactured by using the constituent members having the same material and size as those of the envelope. The AA ′ cross section of the image display device shown in FIG. 2 is similar to that of the first embodiment.
It looks like 0. When the waviness / warpage of the face plate and the rear plate at the place where the spacer is arranged was measured in the same manner as in Example 1, FIG.
The distance between the upper surface of the spacer and the face plate and the distance between the lower surface of the spacer and the rear plate are
Since the positions of 144b and 144c were 3: 5: 3, an image display device was produced in exactly the same manner as in Example 1. The spacer did not fall over in the subsequent exhaust step, and a highly reliable image display device having a sufficient atmospheric pressure resistant structure could be manufactured.

[Embodiment 3] Referring to FIG. 11, the same face plate, rear plate, outer frame, and spacer as those shown in Embodiment 1 are used except that the face plate is undulated and the rear plate is warped. The envelope will be described. In this embodiment, unlike the first embodiment, first, the face plate, the outer frame, and the spacer are sealed by using the frit glass having the same thickness, and then the frit having a thickness corresponding to the distance between the bottom surface of the spacer and the rear plate. An envelope was produced by sealing with glass. In FIG. 11, reference numeral 151 is a face plate, and 152 is a cross section of the rear plate. However, since the face plate is undulated and the rear plate is warped, the distance between the face plate and the rear plate is not constant. Further, 153 is an outer frame, 154 is a spacer, and 155 is frit glass. First, the waviness / warpage of the face plate and the rear plate shown in FIG. 11a is measured by an optical z-axis length measuring device (CCD autofocus type).
The distance between the spacer bottom surface and the rear plate at the position where the spacer is arranged was determined. As a result, the distance between the bottom surface of the spacer and the rear plate is as shown in FIG. 11c at the spacer placement positions 154a, 154b, 154c.
The ratio was 2: 1: 2 (120 μm: 60 μm: 120 μm). Next, as shown in FIG. 11B, the face plate and the outer frame and the spacer were sealed by using the spacer having the same height and the frit having the same thickness. Next, a frit glass paste was applied so that the thickness of the frit glass was 2: 1: 2, and the frit glass paste was fired in the air to prepare an envelope as shown in FIG. 11c. The spacer did not fall over in the subsequent exhaust process, and a highly reliable envelope having a sufficient atmospheric pressure resistant structure could be manufactured. In this embodiment, the first embodiment
Compared with, changing the thickness of frit glass is
Since it is only the part between the bottom surface of the spacer and the rear plate, the process is simplified and facilitated accordingly.

[Embodiment 4] In the present embodiment, the envelope of Embodiment 3 is different from that of Embodiment 3 except that a phosphor and an electron accelerating electrode are formed on a face plate and an electron source is formed on a rear plate. Similar to the above case, an image display device as shown in FIG. 2 was manufactured by using the constituent members of the same material and size in which the face plate is undulated and the rear plate is warped. The AA ′ cross section of the image display device shown in FIG. 2 is as shown in FIG. 11 as in the third embodiment. When the waviness / warpage of the face plate and the rear plate at the place where the spacer is arranged was measured in the same manner as in Example 3, the upper surface of the spacer and the face plate, the lower surface of the spacer and the rear plate were measured as shown in FIG. The distance between them was 2: 1: 2 at the positions where the spacers 154a, 154b, 154c were arranged. Therefore, an image display device was manufactured in exactly the same manner as in Example 3. The spacer did not fall over in the subsequent exhaust step, and a highly reliable image display device having a sufficient atmospheric pressure resistant structure could be manufactured. In this embodiment, as compared with the third embodiment, the thickness of the frit glass is changed only in the portion between the spacer bottom surface and the rear plate, so that the process is simplified and the manufacturing is facilitated. became.

In the above embodiments, the plate-shaped face plate and the rear plate were used. However, the one in which the outer frame and the face plate are integrated or the one in which the outer frame and the rear plate are integrated from the beginning. It is also possible to use.

[0039]

According to the present invention, by changing the thickness of the frit glass according to the distance between the sealing portions at the position where the spacers are arranged, it is possible to reduce the thickness of all the spacers without extra time and cost. It is possible to provide a highly reliable image display device which can perform good sealing and has a sufficient atmospheric pressure resistant structure, and an envelope used for them.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an envelope of the present invention.

FIG. 2 is a perspective view of an image display device of the present invention.

FIG. 3 is a schematic diagram of a planar surface conduction electron-emitting device used in the present invention.

FIG. 4 is a schematic diagram of a vertical surface conduction electron-emitting device used in the present invention.

FIG. 5 is a schematic diagram illustrating an example of a fluorescent film.

FIG. 6 is a schematic view showing an example of a matrix-arranged element substrate used in the present invention.

FIG. 7 is a block diagram showing an example of a drive circuit for displaying on an image display device according to an NTSC television signal.

FIG. 8 is a schematic view showing an example of a ladder arrangement type element substrate used in the present invention.

FIG. 9 is a perspective view of an image display device of the present invention.

FIG. 10 is a cross-sectional view of an example of the envelope of the present invention.

FIG. 11 is a sectional view of an example of the envelope of the present invention.

FIG. 12 is a cross-sectional view of a conventional envelope.

[Explanation of symbols]

 800, 145, 155 Frit glass 801, 142, 152 Rear plate (element substrate) 802, 143, 153 Outer frame 803 Glass substrate 804 Fluorescent film 805 Metal back 806, 141, 151 Face plate 87 High voltage terminal 808 Envelope 809 Spacer 702 X-direction wiring 703 Y-direction wiring 704 Surface conduction electron-emitting device 705 Connection 901 Black member 902 Phosphor

Claims (6)

[Claims] 1. A face plate, a rear plate arranged to face the face plate, an outer frame surrounding the circumference between the face plate and the rear plate, and the atmospheric pressure resistant support structure. An envelope comprising a spacer arranged between a face plate and the rear plate, wherein the outer frame and the spacer are sealed to the two plates with frit glass to maintain a vacuum inside, The thickness of at least one of the frit glass formed between the spacer and the face plate or the frit glass formed between the spacer and the rear plate is changed according to the distance between the face plate and the rear plate. An envelope characterized by being. 2. The thickness of only the frit glass formed between the spacer and the face plate or the frit glass formed between the spacer and the rear plate according to claim 1, The envelope according to claim 1, wherein the envelope is changed according to the distance between the plates. 3. An image display device using the envelope according to claim 1, wherein a phosphor and an electron acceleration electrode are formed on the face plate, and an electron source is formed on the rear plate. An image display device characterized by being. 4. The image display device according to claim 3, wherein the electron source is a surface conduction electron-emitting device. 5. A face plate, a rear plate arranged to face the face plate, an outer frame surrounding the circumference between the face plate and the rear plate, and the atmospheric pressure resistant support structure. Manufacturing an envelope comprising a spacer arranged between a face plate and the rear plate, wherein the outer frame and the spacer are sealed to the two plates with frit glass to maintain a vacuum inside. In the method, waviness of the face plate and the rear plate
A step of measuring a warp to obtain a distance between the face plate and the rear plate at an arrangement position of the spacer,
3. The method of manufacturing an envelope according to claim 1, further comprising the step of changing the thickness according to the distance between the face plate and the rear plate to form the frit glass at the spacer arrangement position. 6. A face plate having a phosphor and an electron accelerating electrode, a rear plate having an electron source and arranged so as to face the face plate, and a peripheral face between the face plate and the rear plate. An outer frame surrounding the spacer and a spacer disposed between the face plate and the rear plate as an atmospheric pressure resistant support structure, wherein the outer frame and the spacer are used to maintain a vacuum inside. In the method for manufacturing an image display device sealed with frit glass, the undulation of the face plate and the rear plate
A step of measuring a warp to obtain a distance between the face plate and the rear plate at an arrangement position of the spacer,
5. The method of manufacturing an image display device according to claim 3, further comprising the step of changing the thickness according to the distance between the face plate and the rear plate to form the frit glass at the spacer arrangement position.