JPH10289677A - Plane type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize external dimensions of a plane type display device by disposing a non-evaporation type getter in a container without providing a scape for getter disposition in the periphery of a display face. SOLUTION: This device comprises a front panel 1 on which a phosphor 8 is formed and a rear panel 2 on which an electron source 4 is formed, and an electron emission space is formed in vacuum state between the front panel 1 and the rear panel 2. A non-evaporation type getter 5 activated to a gas adsorption state by being heated is disposed in an electron emission space between any electron gun 4 and its adjacent electron source 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display, and more particularly, to a flat panel display having a non-evaporable getter for adsorbing a gas into a discharge space of electrons emitted from a cold cathode. Regarding improvement.

[0002]

2. Description of the Related Art In recent years, flat panel displays (flat panel displays) have been actively developed. Among them, a field emission type cathode arranged in a plane, that is, an F source provided with an electron source composed of a cold cathode (Cold Cathode).
2. Description of the Related Art An ED (Field Emission Display) has attracted attention as a self-luminous display device that can achieve high luminance, a wide viewing angle, high-speed response, and low power consumption.

Generally, in a FED, an electron source composed of a field emission type cathode is disposed on a rear panel (rear panel), and a phosphor constituting a pixel is provided on an inner surface of the front panel opposed to the rear panel. Are formed.
Then, the electrons emitted from the electron source excite the phosphor to emit light. Therefore, in order to emit electrons from the electron source of the display device in a sufficiently stable manner and to cause the phosphor to emit light,
The inside of a container (envelope) composed of the facing front panel, rear panel, and outer frame (spacer glass) surrounding the periphery is 10
^It is necessary to maintain a high vacuum of about ^-6 to 10 ^-8 Torr to form a discharge space (flying space) for electrons between the front panel and the back panel.

However, even if a display device is manufactured by evacuating and sealing the container to a high vacuum state, for example, afterwards, outgas is generated from the phosphor or the inner surface of the container and the degree of vacuum in the container is reduced. Or the outgassed molecules may adhere to the surface of the cathode, which hinders electron emission from the cathode. Therefore, in order to adsorb such outgas and maintain the inside of the container in a high vacuum state and suppress a decrease in luminance of the display device, that is, to maintain the life of the display device, this type of display device is called a getter. Outgas adsorption metal is mounted in the container.

[0005] Such getters include an evaporable getter which is used by vapor deposition (getter flash) on the inner surface of a container and a non-evaporable getter which is activated and used to adsorb a gas by heat treatment without being deposited in the container. It is roughly divided into evaporable getters.

[0006] In the vapor deposition type getter, for example, a ring-shaped metal container is filled with a powdery getter material containing barium or the like and mounted in a container, and after sealing the container, a high-frequency magnetic field is applied from the outside, for example. Heat treatment (induction heating) is performed by a closed loop current generated by application, and vapor deposition (getter flash) is performed on the inner surface of the container.

The non-evaporable getter is obtained by forming an antioxidant film on the surface of a powdery getter material containing zirconium or the like and then processing it into, for example, a strip (strip) or a wire. By heating the non-evaporable getter placed in the container to several hundred degrees during or after sealing the container, the antioxidant film on the surface of the getter material is removed and activated to adsorb gas. Is what is done.

Here, if a vapor deposition type getter is used in a display device in which a space for getter flash cannot be sufficiently secured in the container, the area of the vapor-deposited getter may be small and the outgas adsorption capability may be insufficient. . Further, there is a possibility that an electrode or the like inside the container is short-circuited by the scattered getter. Therefore, a non-evaporable getter is used in such a display device. Especially,
Non-deposited getters are often used in thin flat panel display devices such as FEDs (the gap between the front and back panels is on the order of hundreds of micrometers to several mm).

FIG. 20 is a sectional view showing an example of the configuration of a conventional flat panel display device described in Japanese Patent Application Laid-Open No. 5-124015. In the drawing, reference numeral 120 denotes a front panel, and 121 denotes a phosphor adhered to the front panel 120. Red, green, and blue phosphors are sequentially arranged to form a phosphor screen. 1
22 is a back panel, 123 is an insulating sealing material for sealing the front panel 120 and the back panel 122 so as to keep a predetermined interval, 124 is a groove provided around the fluorescent screen 120, and 125 is a groove A non-evaporable getter material 124 is accommodated, 126 is an electrode structure including a cathode electrode and a gate electrode, 127 is an exhaust port, 128 is a chip-off tube sealed around the exhaust port, and 129 is a chip-off tube. A frit glass 130 is provided, and 130 is an address terminal.

At the time of evacuation of a container manufactured by sealing the front panel 120 and the rear panel 122 with an insulating sealing material,
The non-evaporable getter material 125 housed in the groove 124 is heated by induction heating or energization heating to release the gas from the non-evaporable getter material 125 itself and to be activated to adsorb gas. Then, after the inside of the container reaches a high degree of vacuum, the small diameter portion of the tip-off tube is sealed. Also, the electrode assembly 126
Is configured to include a cathode electrode and a gate electrode,
Field emission cathodes (cold cathodes) corresponding to red, green, and blue phosphors are formed at intersections of the cathode electrode and the gate electrode.

On the other hand, there is known a large-screen display device in which a large number of display devices are arranged in a matrix in a matrix. FIG. 21 is an external view showing each display device used for such a large screen display.
22 is an external view showing a part of a large-screen display device configured by arranging the display devices shown in FIG. 21.

In the figure, 140 is a front panel, 141 is a phosphor as a pixel adhered to the inner surface of the front panel, 142 is a spacer glass, 143 is a rear panel, 1
44 is a display device. The front panel 140, the spacer glass 142, and the rear panel 143 are sealed with frit glass to form a container (envelope).
Is provided with an exhaust pipe (not shown) for exhausting the inside of the container to a high vacuum state.

A hot cathode (not shown) made of a linear filament for emitting electrons is mounted on the back panel 143, and the phosphor 14 coated on the front panel 140 is mounted on the back panel 143.
Aluminum film formed on 1 (so-called aluminum back,
(Not shown) as an anode electrode, and emits light when electrons from the hot cathode hit the phosphor 141. The illustrated display device is a device that arranges a total of four dots of red, green, and blue phosphors of 1, 2, and 1 dots per pixel (so-called “cross-shaped arrangement”).

Such a large-screen display is required to emit light with higher luminance when used in an environment having a relatively high ambient illuminance such as an outdoor environment.
An anode voltage of about 0 kV) is applied. Then, the display devices 144 are arranged as shown in FIG. 22 (for example, 4 × 4 in length and width), and a display unit is configured. By arranging a plurality of display units, a large screen display is formed.

FIG. 23 is a diagram showing an example of a pixel arrangement in each display device. In the figure, R, G, and B represent red, green, and blue dots, respectively. In this case, R-
One pixel is constituted by four dots of GGB, and in this case, light emission of four pixels per one display device is performed according to a display image. In such a large-screen display in which the display devices are arranged in a matrix, the pitch between pixels in the display device and the distance between adjacent display devices are set so that the boundary (joint) between the adjacent display devices is not noticeable. It is necessary to make the pitch substantially equal.

FIG. 24 is a diagram showing the pitch between pixels for two adjacent display devices. It is necessary to configure each display device such that the pitch a between pixels is substantially equal to the pitch b between display devices. is there. Therefore, in order to reduce the pixel pitch and achieve high definition, the display device pitch b
Also need to be smaller. That is, it is necessary to minimize the space between the display and the adjacent display device, and to connect a control electrode (not shown) for controlling electron emission from the cathode to the outside of the display device with a lead or pin or a vacuum exhaust. It is also necessary to draw out the exhaust pipe and the like backward (to the rear (rear direction), that is, in the direction opposite to the display surface).

However, in the conventional display device provided with the non-evaporable getter, it is necessary to secure a space for disposing the getter around the display surface (around the fluorescent screen). There was a problem of becoming large.

In particular, when the present invention is applied to a large screen display device in which a predetermined number of display devices are arranged vertically and horizontally in a matrix, it is necessary to make the boundaries (joints) between the devices inconspicuous in visual sense. A getter arrangement space must be provided around the display surface of the display device. For this reason, there has been a problem that the pitch between devices cannot be reduced, the pixel pitch is also limited, and a high-definition large-screen display cannot be realized.

Further, depending on the method of holding the getter in the groove, there is a problem that the heat conduction to the front panel increases during heating and the front panel may be broken.

Further, since the getter is arranged on the front panel side, when applied to a large-screen display device configured by arranging display devices in a matrix, a method for taking out the getter energizing heating electrode from the back surface of the device and the However, there is a problem that the configuration is complicated.

Further, in a display device which requires a particularly high-luminance display, when operating at a high anode voltage (about several kV), the potential of the non-evaporable getter is not fixed (floating state). For example, unnecessary electric field emission (discharge) may occur from the non-evaporable getter.
That is, when a part of the electrons emitted from the electron source strikes the non-evaporable getter 5, the non-evaporable getter is charged, the charged electric charge is emitted toward the phosphor screen, and unnecessary electric field emission occurs. As a result, there is a problem that erroneous light emission of the phosphor occurs.

Further, in a display device which requires a particularly high-brightness display, when the anode electrode is operated at a high voltage, for example, fine dust floating in the vacuum container triggers the anode electrode. There is a case where a direct discharge occurs between the electron source and the electron source, and there is a problem that the electron source is destroyed by the direct discharge.

[0023]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and does not provide a space for getter arrangement around the display surface.
Another object is to provide a flat panel display device having a small external dimension by arranging a getter for securing a large gas adsorption area in a container.

Further, there is provided a flat panel display device having a small pitch between display devices in which a getter for securing a large gas adsorption area is disposed in a container without providing a space for getter placement around the display surface. One of the purposes.

Another object is to provide a flat panel display device in which heat conduction to a container during getter heating is suppressed.

Another object of the present invention is to provide a flat panel display device in which a getter heating electrode is taken out from the back with a simple configuration.

In addition, by arranging display devices having a small pixel interval between adjacent display devices in a matrix,
It is an object to provide a high-definition large-screen display in which boundaries between devices are inconspicuous in visual sense.

Another object of the present invention is to provide a flat panel display device in which unnecessary electric field radiation from a non-evaporable getter to a light emitting surface is suppressed, and erroneous light emission of a phosphor is suppressed.

Another object of the present invention is to provide a flat panel display device in which the occurrence of a direct discharge between the anode electrode and the electron source is suppressed, and the destruction of the electron source is suppressed.

[0030]

A flat panel display device according to the present invention comprises a front panel on which a phosphor is formed, and a plurality of electron sources arranged to face the front panel and emitting electrons to the phosphor. A flat panel display device comprising: a formed rear panel; and a vacuum state between the front panel and the rear panel to form an electron emission space. The flat panel display device is activated to a state of adsorbing gas by being heated. Non-evaporable getter,
It is arranged in one of the electron emission spaces and between any one of the electron sources and the adjacent electron source.

In the flat panel display device according to the present invention, the non-evaporable getter has a band-like or wire-like shape, penetrates the back panel, and one terminal is connected to an end of the non-evaporable getter. In addition, the other terminal includes a pair of getter electrodes exposed from the outer surface of the back panel, and a non-evaporable getter is provided.
While being energized and activated through the getter electrode,
The getter electrode is configured to be supported separately from the rear panel.

In the flat panel display device according to the present invention, the non-evaporable getter has a band-like or wire-like shape, one terminal is connected to an end of the non-evaporable getter, and the other terminal is connected to the back panel. A pair of getter electrodes fixed to the periphery of the back panel together with a sealing agent for sealing the front panel and the back panel, and the non-evaporable getter is energized through the getter electrodes. And is supported by the getter electrode while being separated from the back panel.

In the flat panel display according to the present invention, the non-evaporable getter is energized through the getter electrode, and after the non-evaporable getter is activated, the getter electrode is cut off at the peripheral portion of the back panel. Be composed.

Further, in the flat panel display device according to the present invention, the non-evaporable getter has a band shape or a wire shape, and any one of the electron sources and the electron source adjacent to the electron source on the inner surface of the back panel. And a non-evaporable getter is arranged in this groove.

In the flat panel display according to the present invention, the non-evaporable getter is arranged such that the front surface thereof is located rearward of the electron emission portions of any adjacent electron sources.

Further, in the flat panel display according to the present invention, one terminal is connected to the front surface of the end of the non-evaporable getter, and the other terminal is pulled out from the peripheral portion of the rear panel to seal the front panel and the rear panel. And a pair of getter electrodes fixed between the front panel and the back panel together with the sealing agent at the time of the operation, and the non-evaporable getter is configured to be supported by being separated from the back panel by the getter electrodes.

Further, in the flat panel display device according to the present invention, the width of the opening formed in the back panel is smaller than the width of the inside thereof, and the non-evaporable getter is arranged inside the groove. At the same time, the periphery of the opening of the groove is configured to cover the side surface of the non-evaporable getter.

Further, in the flat panel display device according to the present invention, the non-evaporable getter has a flat plate shape, is disposed in front of the rear panel so as to face the front panel, and is formed on the rear panel. A through-hole is formed in the non-evaporable getter corresponding to the position of the source, and the through-hole has a smaller peripheral edge than the trajectory of electrons from the emission from the electron source to the corresponding phosphor. It is formed in a size located on the outside,
One terminal is connected to the non-evaporable getter and penetrates the back panel, and the other terminal includes a pair of getter electrodes exposed from the outer surface of the back panel.

Further, the flat panel display according to the present invention is provided with a front panel on which a phosphor is formed, a back panel arranged opposite to the front panel, and an inside of the rear panel opposed to the front panel. A flat panel display device, comprising: a cathode panel on which a plurality of electron sources for emitting electrons to the phosphor are formed; and forming a vacuum between the front panel and the back panel to form an electron emission space. A non-evaporable getter activated to a state of adsorbing gas by being carried out is arranged in one of the electron emission spaces and between any one of the electron sources and the electron source adjacent thereto. You.

Further, in the flat panel display device according to the present invention, the non-evaporable getter has a band-like or wire-like shape, and any one of the electron sources and the electron source adjacent thereto are formed on the inner surface of the cathode panel. And a groove-shaped hole is formed between them, and a non-evaporable getter is arranged in the groove-shaped hole.

Further, in the flat panel display according to the present invention, the non-evaporable getter has a band-like or wire-like shape, and the cathode panel is formed between any one of the electron sources and an adjacent electron source. A groove having a larger width than the through hole is formed in the back panel corresponding to the through hole, and a non-evaporable getter is arranged in the groove to pass through the cathode panel. The periphery of the hole is configured to cover the side surface of the non-evaporable getter.

In the flat panel display device according to the present invention, the non-evaporable getter has a band-like or wire-like shape, penetrates the back panel, and one terminal is connected to an end of the non-evaporable getter. The other terminal includes a pair of getter electrodes that are exposed from the outer surface of the back panel, and the non-evaporable getter is energized and activated through the getter electrode, and is supported by the getter electrode while being separated from the back panel. It is configured to be.

Further, in the flat panel display according to the present invention, the non-evaporable getter has a band-like or wire-like shape, one terminal is connected to an end of the non-evaporable getter, and the other terminal is connected to the back panel. Withdrawing from the peripheral portion, comprising a pair of getter electrodes fixed to the rear panel peripheral portion together with a sealing agent for sealing the front panel and the rear panel, the non-evaporable getter,
While being energized and activated through the getter electrode,
The getter electrode is configured to be supported separately from the rear panel.

In the flat panel display according to the present invention, the non-evaporable getter is energized through the getter electrode, and after the non-evaporable getter is activated, the getter electrode is cut off at the peripheral portion of the back panel. Be composed.

[0045]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a diagram showing a configuration example of a flat panel display device according to a first embodiment of the present invention, and FIG.
Is a front view of a partially broken view from the display surface side, and FIG.
It is sectional drawing when it sees in a cross section. In this figure, 1 is a front panel (face panel), 2 is a rear panel (rear panel), 3 is a spacer glass, 4 is an electron source composed of a cold cathode, 5 is a strip-shaped non-evaporable getter, and 6 is a non-evaporable getter. 5 is a getter heating electrode connected to both ends and has a pin shape.

Reference numeral 7 denotes an exhaust pipe for evacuating the container (envelope), 8 denotes a phosphor corresponding to each display dot, and 9 denotes an aluminum film (aluminum back) serving as an anode electrode (anode). It is. The electron source 4 is formed on the back panel 2 corresponding to each phosphor (display dot) 8. Further, in the present embodiment, one pixel is constituted by four dots of R, G, G, and B, and the display device is 4 ×
It is assumed that four pixels (64 dots) are provided.

The front panel 1 and the rear panel 2 are respectively sealed to the spacer glass 3 using a sealing material such as frit glass (low melting glass), and the front panel 1, the rear panel 2 and the spacer glass 3 are used. Construct a vacuum container (envelope). This vacuum container is sealed after the inside of the container is evacuated to a high vacuum of, for example, about 10 ^-6 to 10 ^-8 Torr by an exhaust pipe 7 at the time of manufacturing the device.

FIG. 2 is a diagram showing an example of a pixel array in the flat panel display device according to the present embodiment. In this figure, each dot (phosphor region) of the front panel 1 is indicated by a solid line, and the corresponding electron source region is indicated by a dotted line. 1
Each pixel is composed of four R, G, G, and B dots (so-called “cross-shaped arrangement”), and each dot size is, for example, 2 m.
The m-square and the pixel pitch a are 2 mm.

In this case, if the divergence angle of the electrons emitted from the electron source 4 is about ± 15 ° with respect to the normal direction, and the gap length between the front panel 1 and the back panel 2 is about 3 mm, The size of each electron source 4 is about 0.4 mm square.

FIG. 3 is a partially cutaway view showing one configuration example of the electron source 4 shown in FIGS. FIG. 1 shows a schematic configuration of an electron source 4 including a large number of cold cathodes.
Although the electron source 4 is constituted by 3 × 3 cold cathodes 10 for convenience, the electron source 4 is constituted by, for example, hundreds to thousands of cold cathodes 10 in practice. I have. As the cold cathode 10 used for such an electron source 4, a Spindt-type cold cathode is preferable.

The rear panel 2 is provided with a cathode electrode 11 electrically connected to the cold cathode 10 divided for each line in one direction. The cathode electrode 11 faces the cathode electrode 11 with the insulating layer 12 interposed therebetween. The gate electrode 13 is formed in the other direction perpendicular to the direction. The cathode electrode 11 and the gate electrode 13 are arranged in a matrix in units of rows and columns, for example, and a plurality of circular openings 14 are provided at intersections thereof, and an electron emission unit such as molybdenum (Mo) is provided therein. There is a Spindt-type cold cathode 10 composed of

Here, for example, the arrangement pitch of the cold cathodes 10 is 5 μm, and each area of each electron source 4 corresponding to one pixel is set to 0.
If it is 4 x 0.4 mm square, 6400 pieces (80
× 80) cold cathodes 10 are formed. The diameter of the opening 14 is, for example, about 3 μm.

The cathode electrode 11 and the gate electrode 13 are connected to external electrodes (not shown), and are connected to the outside. For this reason, by selecting a desired electron source 4 by the cathode electrode 11 and the gate electrode 13 arranged in a matrix, an electric field is concentrated on the tip of the cold cathode 10 of the selected electron source 4 and electrons are emitted. . The emitted electrons impinge on a phosphor 8 provided inside the front panel 1 corresponding to the electron source 4, and the phosphor 8 is excited to emit light.

On the other hand, a strip-shaped non-evaporable getter 5 is provided on the back panel 2 via a getter heating electrode 6 between the electron source 4 and the electron source 4 and the electron source 4 adjacent thereto. Are located. As described above, in the present embodiment, for example, the dot size is 2 mm square, and the pixel pitch is 2 mm.
mm, the electron source 4 is about 0.4 mm square, and the interval between the electron sources 4 between pixels is about 3.6 mm. For this reason,
As shown in the figure, a band-shaped non-evaporable getter 5 having a width of about 2 mm can be arranged in a gap between the electron sources 4 between pixels.

As the non-evaporable getter 5, a getter which can be activated to a state where outgas can be adsorbed without getter flushing is used. Such a getter is formed, for example, of a powdery getter material (for example, an alloy containing zirconium or the like as a component) which is formed based on a nichrome material which can be heated by an electric current and has an antioxidant film formed on the surface thereof. (Powder) is coated.

When the vacuum container is evacuated after the front panel 1, the rear panel 2 and the spacer 3 are sealed to form a vacuum container, the respective non-evaporable getters 5 are joined by, for example, spot welding. Is activated by applying a predetermined current between the getter heating electrodes 6. That is, when a predetermined current is applied to the base nichrome material through the getter heating electrode 6, Joule heat is generated, thereby heating the getter material and removing the antioxidant film on the surface of the getter material. The material itself appears on the surface and is activated so that the outgas can be adsorbed.

By using such a non-evaporable getter 5, the getter material does not scatter to the electron source 4 and the phosphor 8. Also, in the process of sealing the vacuum container with frit glass or the like, when high temperature processing of several hundred degrees Celsius is necessary,
A non-evaporable getter that can withstand this (for example, a fritable getter such as St301 (trade name) manufactured by Saes Getters) may be used. Furthermore, if there is almost no outgas from the getter itself due to the heating of the non-evaporable getter 5, the non-evaporable getter 5 may be heated after the evacuation.

In this way, by disposing the non-evaporable getter 5 in the gap between the electron sources 4 on the back panel side, it is not necessary to secure a space for getter flash and getter flash around the display surface. There is no need to increase the outer dimensions for getter placement. In particular, it is possible to reduce the pitch between display devices, which is a problem in increasing the definition of a large screen display in which the display devices are arranged in a matrix. Further, since the getter heating electrode penetrates the back panel, the getter heating electrode can be easily taken out from the back of the apparatus.

Since the non-evaporable getter 5 is activated by heating, when the non-evaporable getter 5 is in contact with the back panel 2, the back panel 2 is also locally heated during heating. As a result, there is a possibility that the rear panel 2 will be cracked due to the resulting distortion. Therefore, in order to suppress heat conduction to the rear panel 2 as much as possible, the non-evaporable getter 5 is connected to the rear panel 2 by the getter heating electrode 6 welded thereto.
Float from the surface of

For this purpose, a hole (through hole) for penetrating the getter heating electrode 6 is provided in the rear panel 2, and the electron source 4 made of a cold cathode is formed thereon. On the other hand, the getter heating electrode 6 is joined to the non-evaporable getter 5, and the getter heating electrode 6 is made to pass through a hole of the back panel 2. The getter heating electrode 6 is placed in a floating state such that the non-evaporable getter 5 does not directly contact the back panel 2.
If the hole through which is passed is closed with frit glass or the like, the non-evaporable getter 5 can be supported away from the rear panel. Thereafter, the rear panel 2 on which the non-evaporable getter 5 is disposed is sealed with the front panel 1 and the spacer 3 to form a vacuum container.

After the getter heating electrode 6 is first penetrated through the back panel 2 and its periphery is closed with frit glass or the like, the non-evaporable getter 5 is joined to the getter heating electrode 6 by spot welding or the like. You can also. At this time, the non-evaporable getter 5 is heated at a temperature lower than its melting point (about 450 ° C.) for several tens of minutes, for example, so that the frit glass is not melted via the getter heating electrode 6. It may take a long time.

In this way, if the non-evaporable getter is supported away from the rear panel using the getter heating electrode,
Heat conduction to the back panel when heating the non-evaporable getter can be minimized.

A non-evaporable getter 4 which can be reactivated (for example, St101 manufactured by SAES Getters)
(Product name) etc. ), When the outgas adsorption ability of the non-evaporable getter 4 is reduced after a considerable time has elapsed after the operation of the display device, it is heated again to activate it.
It is also possible to restore the outgas adsorption capacity to a certain extent.

Embodiment 2 In the display device according to the first embodiment, for example, three non-evaporable getters 5 are arranged in a space between the electron sources 4 in a 4 × 4 pixel configuration, and getter heating electrodes 6 are provided at both ends of each non-evaporable getter 5. However, the non-evaporable getter 5 is formed in a zigzag shape so as to sew the gap between the electron sources 4 to obtain the same getter area by one non-evaporable getter, and the getter heating electrode is formed by two.
It is also possible to configure so as to reduce the number to one.

FIG. 4 is a diagram showing an example of the configuration of a flat panel display device according to the second embodiment. FIG. 4A is a partially cutaway front view from the display surface side, and FIG. It is sectional drawing when it sees in AA cross section. In this figure, reference numeral 20 denotes a non-evaporable getter in which a strip-shaped non-evaporable getter is joined in a zigzag shape so as to sew a gap between the electron sources 4, and 21 denotes a non-evaporable getter 2.
Supports joined to zero. Other configurations are the same as those described in the first embodiment.

The non-evaporable getter 20 has a pair of getter heating electrodes 6 joined to both ends thereof and an appropriate support 21 joined thereto, and is supported by the getter heating electrode 6 and the support portion 21. , So as not to come into contact with the rear panel 2. The non-evaporable getter 20 can be heated and activated by applying a predetermined current from both ends of the pair of getter heating electrodes.

The support 21 is in contact with the surface (inner surface) of the back panel 2 and supports the non-evaporable getter 20. In addition, even if the non-evaporable getter 20 does not have the support 21, if the pair of getter heating electrodes 6 can support the non-evaporable getter 20 without contacting the back panel 2, the support 21 can be omitted. Furthermore, if the non-evaporable getter 20 can be supported only by the support portion 21, the getter heating electrode 6 is intended only for electrical connection, and is not configured to support the non-evaporable getter 20. It may be.

As described above, in the present embodiment,
Furthermore, the number of getter heating electrodes can be reduced to two while securing the getter area. This is particularly effective in a display device having a large number of pixels and a large number of leads or pins for taking out each control electrode.

FIG. 5 is a diagram showing another configuration example of the flat panel display device according to the second embodiment, and shows a partially cutaway front view as viewed from the display surface side. In the case of the flat panel display device shown in FIG. 4, the belt-shaped non-evaporable getter is configured to be connected in a zigzag manner. However, as shown in FIG. It can also be configured to be connected in a square ring shape and to provide getter heating electrodes 6 at both ends. Reference numeral 22 in the figure denotes a non-evaporable getter having a square ring shape with an open corner.

Further, even if the strip-shaped non-evaporable getter is not connected in a zigzag or square ring shape, for example, a plate-shaped non-evaporable getter may be stamped out.
The non-evaporable getter itself may be formed, for example, in a zigzag or square ring shape. When a non-evaporable getter is formed based on a heater material such as nichrome, the heater material is formed in a zigzag or square shape by stamping, bending, or the like, and a powdery getter material is coated thereon. What should I do?

Embodiment 3 FIGS. 6A and 6B are diagrams showing an example of the configuration of a flat panel display device according to the third embodiment, wherein FIG. 6A is a partially cutaway front view from the display surface side, and FIG. FIG. In this figure, reference numeral 40 denotes a groove formed in the back panel 2. The strip-shaped non-evaporable getter 5 is disposed inside the groove 40.

At this time, similarly to the above embodiments, the non-evaporable getter 5 is connected to the back panel 2 via the getter heating electrode 6.
It is arranged so that it does not touch. Further, the surface of the non-evaporable getter 5 is arranged below the electron emission point of the electron source 4 (near the tip of the cone-shaped cold cathode). However, since the height (thickness) of the electron source 4 composed of a cold cathode is actually about several μm, the electron source 4 may be embedded so as to be substantially lower than the inner surface of the back panel 2.

When the display device is operated with a high anode voltage (approximately several kV) to achieve a high-luminance display, the potential of the non-evaporable getter 5 is not fixed (floating state). And a part of the electrons emitted from the electron source 4 also hits the non-evaporable getter 5, so that the non-evaporable getter 5 is charged, and the charged electric charge is emitted toward the phosphor screen. The electric field emission (discharge) occurs, which causes a problem that erroneous light emission of the phosphor occurs. For this reason, in the present embodiment, a groove 40 is provided in the back panel 2 and the groove 40 is provided.
By embedding the non-evaporable getter 5 in the, the electron emitted from the electron source 4 is prevented from hitting the non-evaporable getter 5.

Further, the non-evaporable getter 5 is dropped to the ground potential through the getter heating electrode 6 during the operation of the display device, so that even if the electrons emitted from the electron source 4 hit the non-evaporable getter 5, the charge is maintained. Can be kept up. However, in this case, under the situation where the non-evaporable getter 5 and the electron source 4 are arranged close to each other, particularly when the non-evaporable getter 5 is arranged above the electron source 4, the ground becomes The electron trajectory emitted from the electron source 4 toward the anode electrode (aluminum back) is bent by the electric potential, so that the electron hits only a part of the regular phosphor and the brightness is reduced. There is a possibility that an electron strikes a part of the light emission and erroneous light emission occurs.

Therefore, in the present embodiment, a groove 40 is provided in the back panel 2 and the non-evaporable getter 5 is provided therein.
The front surface (the upper surface in FIGS. 6B and 6C) is the electron source 4
Is arranged behind the electron emission point (substantially the inner surface of the back panel 2), thereby suppressing the influence on the electron trajectory caused by setting the non-evaporable getter 5 to the ground potential. Becomes possible. Therefore, charge-up of the non-evaporable getter can be prevented while suppressing the influence on the electron orbit.

When the non-evaporable getter 5 is disposed in the groove 40 of the rear panel 2, the non-evaporable getter 5 is not completely stored inside the groove 40, and its front surface is formed by the inner surface of the rear panel or the electronic device. Even in the case where the non-evaporable getter 5 is retracted rearward, the charge-up of the non-evaporable getter 5 can be prevented by the arrangement in the groove 40 even when the non-evaporable getter 5 is retracted backward even when the electron emission point of the source 4 is located forward. . That is, by arranging the non-evaporable getter 5 in the groove 40, the probability that electrons emitted from the electron source 4 hit the non-evaporable getter 5 can be reduced, and erroneous light emission of the phosphor due to unnecessary electric field radiation can be prevented. Can be reduced.

Embodiment 4 FIGS. 7A and 7B are diagrams showing a configuration example of a flat panel display device according to a fourth embodiment, in which FIG. 7A is a partially cutaway front view from the display surface side, and FIG. FIG. 3C is a cross-sectional view when viewed from a cross section, and FIG. 3C is a cross-sectional view when viewed from a BB cross section. In this figure, reference numeral 30 denotes a getter heating electrode connected to the non-evaporable getter 5, and 31 denotes a support for supporting the non-evaporable getter 5. In the first embodiment, a pin-shaped electrode is used as an example of the getter heating electrode, but in the present embodiment,
Use a plate. Other configurations are described in Embodiment 1.
This is the same as described above.

The getter heating electrode 30 is joined to both ends of the strip-shaped non-evaporable getter 5 by spot welding or the like so as to be in contact with the lower surface, and the getter heating electrode 30 is projected from the outer periphery of the back panel 2 (outside the device) ),
The non-evaporable getter 5 and the rear panel 2 are fixed so that they do not come into direct contact with each other by sealing with a sealing material such as frit glass while being sandwiched between the spacer glass 3 and the rear panel 2 (sandwiched state). You.

When there is a possibility of contact between the non-evaporable getter 5 and the back panel 2, a support 31 whose tip is embedded in the rear panel is provided on the lower surface of the non-evaporable getter 5, for example. Just do it. If a gap between the spacer glass 3 and the back panel 2 becomes a problem when sealing the container,
It is sufficient that a concave portion for receiving the getter heating electrode 30 is provided in advance on the rear panel side end surface of the spacer glass 3.

FIGS. 8A and 8B are diagrams schematically showing a cross section taken along the line AA of the flat panel display device shown in FIG. As shown in FIG. 8A, after sealing the container, a predetermined current is applied from both ends of the getter heating electrode 30 protruding outside the device, thereby heating and activating the non-evaporable getter 5. Then, as shown in FIG. 3B, the getter heating electrode 30 is formed along the side surface of the display device so that a gap between adjacent display devices is not formed due to the matrix arrangement.
By cutting (cutting) the external dimensions can be reduced. Therefore, when a large screen display is configured by arranging the flat panel display devices in a matrix, the pitch between the display devices can be reduced, and the large screen display can have higher definition.

The non-evaporable getter 5 is heated at a temperature lower than its melting point (about 450 ° C.) for several tens of minutes, for example, so that the frit glass is not melted through the getter heating electrode 30. Should be performed over a relatively long time.

As described above, in the present embodiment,
Further, it is possible to eliminate the getter heating electrode taken out from the back surface of the display device, and it is possible to easily fix the getter heating electrode in a state of being floated from the back panel during the sealing step. This is particularly effective in a display device having a large number of pixels and a large number of leads or pins for taking out the back surface of each control electrode.

Embodiment 5 FIGS. 9A and 9B are diagrams showing a configuration example of a flat panel display device according to the fifth embodiment, where FIG. 9A is a front view when viewed from the display surface side, and FIG.
FIG. 4 is a cross-sectional view as viewed in a section A, and FIG. 4C is a cross-sectional view as viewed in a section BB. Also in the present embodiment, the groove 40 is formed in the back panel 2 as in the fourth embodiment.

On the other hand, a plate-shaped getter heating electrode 50 is joined to the front surface of the strip-shaped non-evaporable getter 5 by spot welding or the like. The band-shaped non-evaporable getter 5 is disposed (buried) inside the groove 40. At this time, as in the above embodiments, the non-evaporable getter 5 is arranged so as not to contact the back panel 2 via the getter heating electrode 50. Further, the front surface of the non-evaporable getter 5 is mounted so as to be lower than the electron emission point of the electron source 4 (near the tip of the cone-shaped cold cathode).

Here, in the present embodiment, as in Embodiment 4, when the container is sealed, the getter heating electrode 5
0 so as to protrude from the outer periphery of the rear panel 2 (so as to protrude outside the device), and the spacer glass 3 and the rear panel 2
The non-evaporable getter 5 and the rear panel 2 are fixed so as not to directly contact with each other by sealing with a sealing material such as frit glass in a state of being sandwiched (sandwiched).

Then, as in the fourth embodiment, as shown in FIG. 8, after sealing the container, a predetermined voltage is applied to both ends of the getter heating electrode 50 which has protruded outside, so that the non-evaporable getter 5 is formed. Is heated to activate. Then, the getter heating electrode 50 is cut (cut) along the side surface of the display device so that a gap between adjacent display devices is not formed due to the matrix arrangement.

In this manner, the position of the front surface of the non-evaporable getter 5 at the time of mounting is substantially flush with the inner surface of the rear panel 2 and can be lower than the electron emission portion of the electron source 4. As in the fourth embodiment, it is possible to suppress the influence on the electron trajectory caused by setting the non-evaporable getter 5 to the ground potential.

Further, as in the fourth embodiment, the number of getter heating electrodes to be taken out from the back of the display device can be eliminated, and the getter heating electrodes can be easily fixed while floating from the back panel during the sealing step. . This is particularly effective in a display device having a large number of pixels and a large number of leads or pins for taking out the back surface of each control electrode.

Embodiment 6 FIG. FIG. 10 is a diagram showing a configuration example of a flat panel display device according to the sixth embodiment.
(a) is a partially cutaway front view as viewed from the display surface side, (b) is a cross-sectional view as viewed along AA section, and (c) is a cross-sectional view as viewed along BB section. In this drawing, reference numeral 60 denotes a cathode panel on the surface of which a plurality of electron sources 4 composed of cold cathodes are formed, and 61 denotes a groove-shaped hole (not shown) for mounting a strip-shaped non-evaporable getter 5 provided on the cathode panel. Slot),
Reference numeral 62 denotes a plate-like getter heating electrode joined to the non-evaporable getter 5 by spot welding or the like, and 63 denotes a non-evaporable getter 5.
Is a support joined by spot welding or the like.

As shown in FIG. 10, the electron source 4 is formed on a cathode panel 60 provided separately from the back panel 2, and is fixed to the back panel 2 by frit glass or the like. Here, a plate-like getter heating electrode 62 and a support 63 are joined to the back surface of the non-evaporable getter 5, and are sandwiched between the back panel 2 and the cathode panel 60, respectively. Further, the cathode heating electrode 62 protrudes from the outer periphery of the back panel 2 (extends outside the container), and
As in the fourth embodiment, the spacer glass 3 and the back panel 2
The container is sealed in a state of being sandwiched between the containers. At this time, the non-evaporable getter 5 is supported so as not to directly contact the back panel 2 and the cathode panel 60.

As in the case of the fourth embodiment, as shown in FIG. 8, after sealing the container, a predetermined voltage is applied to both ends of the getter heating electrode 62 which has protruded outside, so that the non-evaporable getter 5 is formed. Is heated to activate. Thereafter, the getter heating electrode 62 is cut (cut) along the side surface of the display device so that a gap between adjacent display devices is not formed due to the matrix arrangement.

As described above, even when the thickness (about 1 mm if the semiconductor manufacturing apparatus is diverted) on which the electron source 4 is formed cannot be sufficiently obtained due to the formation process of the electron source 4, etc. Since the rear) side has a double structure, the surface of the non-evaporable getter 5 can be easily mounted with the surface of the non-evaporable getter 5 lowered below the electron-emitting portion of the electron source 4. To the ground potential can suppress the effect on the electron orbit.

Further, as in the fourth embodiment, the number of getter heating electrodes taken out from the back surface of the display device can be eliminated, and the getter heating electrodes can be fixed during the sealing step. This is particularly effective in a display device having a large number of pixels and a large number of leads or pins for taking out the back surface of each control electrode.

In this embodiment, the getter heating electrode 62 has a plate shape. However, as shown in FIG. 11, the getter heating electrode 62 has a pin shape as described in the first embodiment. You may make it. Reference numeral 64 denotes a support for supporting the non-evaporable getter 6. Non-evaporable getter 5
Are supported by the pin-shaped getter heating electrode 6 or the support 64 so as not to directly contact the back panel 2 and the cathode panel 60.

In this case, the rear panel 2 is glass-shaped so that the getter heating electrode 6 penetrates and is fixed in advance, and before the cathode panel 60 is fixed to the rear panel 2, the non-evaporable getter 5 is removed. What is necessary is just to join by the spot welding etc. to the getter heating electrode 6 which has already penetrated and fixed to the back panel 2. After the cathode panel 60 is fixed to the rear panel 2, the non-evaporable getter 5 may be joined to the getter heating electrode 6 already penetrating the rear panel 2.

The support 64 does not need to penetrate the rear panel 2, but only needs to be partially embedded in the rear panel 2. In addition, even if the support 64 is not particularly used, the non-evaporable getter 6 and the back panel 2 may be omitted if there is no possibility of direct contact.

A plate-like support 63 as shown in FIG. 10 is joined to the lower surface of the non-evaporable getter 6, and the non-evaporable getter 5 is sandwiched between the cathode panel 60 and the rear panel 2 to form the non-evaporable getter 5. It may be supported. Also,
In the configuration shown in FIG. 11, the groove-shaped hole 61 provided in the cathode panel 60 may be a groove (a groove-shaped concave portion) that does not penetrate the back panel 2.

[0098] Even if the support is not particularly used, the non-evaporable getter 6 and the back panel 2 may be omitted if there is no possibility of direct contact.

In each of the above embodiments, the non-evaporable getter 5 has a band shape (strip shape), but a wire shape may be used. Further, although the getter heating electrode 6 is joined to the end face of the non-evaporable getter 6, it may be joined to the lower face.

Embodiment 7 FIG. Embodiments 3 to 6 above
The groove formed in the back panel 2 or the cathode panel 60 on which the non-evaporable getter 5 is mounted is
, So as not to come into contact with the rear panel 2 or the cathode panel 60, so that heat is not transmitted as much as possible during heating. However, in particular, when a strip-shaped one is used as the non-evaporable getter 5 and the end face is in a sharp state, the non-evaporable getter 5 is used especially when the anode voltage is driven by applying a high voltage of about several kV. When the potential is set to the ground potential, unnecessary electric field emission occurs from the end face of the non-evaporable getter 5, and the phosphor may emit light erroneously.

FIG. 12 is a diagram showing an example of a configuration of a main part of a flat panel display device according to the sixth embodiment. In this figure, a cross section of a mounting portion of the non-evaporable getter 5 is shown. Reference numeral 70 in the drawing denotes a groove formed in the back panel 2, and the width of the opening is smaller than the internal width. The back panel 2 is supported by the getter heating electrode 6 inside the groove 70 so that the non-evaporable getter 5 is disposed so that the periphery of the opening covers the side surface (end surface) of the non-evaporable getter 5. Form.

For example, the getter heating electrode 6 is formed in a shape or material having flexibility and is bonded to the non-evaporable getter 5, while the getter heating electrode 6 is previously provided on the back panel 2. A through hole is provided. Then, the getter heating electrode 6 is passed through the hole of the back panel 2. Then, in a state where the non-evaporable getter 6 is inclined right or left in FIG. Then, the hole through which the getter heating electrode 6 penetrates may be closed with frit glass or the like from the outside of the container in a state where the non-evaporable getter 5 does not directly contact the back panel 2.

FIG. 13 is a diagram showing another configuration example of a main part of the flat panel display device according to the sixth embodiment. In this figure,
The rear side (rear side) as described with reference to FIG.
2 shows a cross section of a mounting portion of the non-evaporable getter 5 in the case of a double structure.

As shown in FIG. 13A, the rear panel 2
The non-evaporable getter 5 is provided via the getter heating electrode 6 so that the non-evaporable getter 5 does not come into direct contact with the back panel 2.
Place at 1. Thereafter, the cathode panel 60 on which the electron source 4 is formed is placed on the back panel 2 and fixed with frit glass or the like. Here, by forming the groove-like through-hole (elongated hole) 610 of the cathode panel 60 smaller than the outer shape of the non-evaporable getter 5 so as to cover the side surface (end surface) of the non-evaporable getter 5, The side surface (end surface) of the evaporable getter 5 is in a state of being covered by the cathode panel 60 around the groove-like through hole (elongated hole) 63.

When the back side (rear side) as described with reference to FIG. 10 in the sixth embodiment has a double structure of the back panel 2 and the cathode panel 60, FIG.
As shown in (b), a groove 71 is provided in the rear panel 2, and one end of the flat getter heating electrode 64 is joined to the upper surface of the non-evaporable getter 5. When sealing the vacuum container, the getter heating electrode 64 is sandwiched between the spacer glass 3 and the back panel 2 so that the other end of the getter heating electrode 64 projects from the outer periphery of the back panel 2 (in a sandwiched state). By sealing with a sealing material such as frit glass, the non-evaporable getter 5 and the back panel 2 are fixed so as not to directly contact.

Here, by forming the groove-like through-hole (elongated hole) 610 of the cathode panel 60 smaller than the outer shape of the non-evaporable getter 5 so as to cover the end face of the non-evaporable getter 5, The end surface of the evaporable getter 5 is in a state of being covered with the cathode panel around the groove-shaped through hole (elongated hole) 610.

As described above, the glass material of the back panel 2 or the cathode panel 60, which is an insulator, is interposed between the end face of the non-evaporable getter 5 and the anode.
Even when the non-evaporable getter 5 is driven to a ground potential when the end surface of the non-evaporable getter 5 is sharp and the anode voltage is driven by applying a high voltage of about several kV, the non-evaporable Unnecessary electric field emission (discharge) from the end face of the getter 5 can be suppressed.

Embodiment 8 FIG. In each of the above embodiments, the non-evaporable getter and the support provided on the non-evaporable getter are configured to support the non-evaporable getter so as not to contact the back panel. It is also possible to provide, for example, a spherical projection (convex portion) at a position facing the non-evaporable getter, thereby supporting the non-evaporable getter.

FIG. 14 is a view showing an example of a configuration of a main part of a mounting portion of a non-evaporable getter of a flat panel display device according to an eighth embodiment, in which (a) shows a rear panel with a display surface. FIG. 2B is a plan view seen from the side, and FIG. Reference numeral 80 denotes a spherical projection (convex portion) provided on the back panel side.

As shown in the figure, as in the first embodiment, the non-evaporable getter 5 is floated so as not to be in direct contact with the surface of the back panel 2 and the getter heating electrode 6 is mounted through the back panel. At this time, the non-evaporable getter 5 is supported so as to make point contact with a spherical projection 80 provided on a portion of the back panel 2 facing the non-evaporable getter 5. Thereby, even if the non-evaporable getter 5 is not provided with a special support, the heat back panel 2 when the non-evaporable getter 5 is heated and activated is activated.
The non-evaporable getter 5 can be easily mounted on the back panel 2 while minimizing conduction to the rear panel 2.

Embodiment 9 FIG. In each of the above embodiments, the non-evaporable getter is configured to be heated and activated by current supply. In such an electric heating method,
It is sufficient to set the voltage applied between the getter heating electrodes so that the getter can be supplied with a predetermined current, so that the getter can be heated reliably. On the other hand, since an electrode for getter heating is separately required, if an external magnetic field generator capable of generating a predetermined amount of current can be used, a high-frequency magnetic field can be applied to perform induction heating. However, the getter heating electrode can be omitted. Hereinafter, an embodiment configured to heat a non-evaporable getter by induction will be described.

FIGS. 15 and 16 are views showing an example of the configuration of a flat panel display device according to the ninth embodiment, in which (a) is a front view as viewed from the display surface side, and (b) is a view. Is A
FIG. 4 is a cross-sectional view when viewed from a -A cross section. Numerals 90 to 96 denote non-evaporable getters in which, for example, band-shaped non-evaporable getters are respectively connected in a square ring, and 97 denotes a support for supporting each non-evaporable getter.

FIG. 15 shows a square annular non-evaporable getter 90 to 90.
FIG. 16 shows a configuration in the case where 92 are arranged concentrically, and FIG. 16 shows, for example, a square annular non-evaporable getter 93 of the same size at four places so as to surround an electron source corresponding to 2 × 2 pixels. The configuration in the case where ~ 96 are arranged is shown.

In each of the drawings, the front panel and the like are omitted, and the configuration of the rear panel is described. However, the configuration of the front panel and the like is the same as in each of the above embodiments. However, in the present embodiment, it is assumed that, for example, pixels formed of dots of RGBG phosphor are arranged 8 × 8 pixels in length and width.

As shown in the figure, each of the non-evaporable getters 90 to 96 in the shape of a square ring is so arranged that it does not directly contact the rear panel.
For example, four corners are supported by supports 97 and mounted on the back panel 2 so as to be arranged in the gaps between the electron sources 4 formed of cold cathodes corresponding to the respective pixels. Then, after sealing the container, by applying a high-frequency magnetic field from the outside of the container during vacuum evacuation, an induction current is generated in each of the non-evaporable getters 90 to 96 having a rectangular ring shape, and the getter is heated by Joule heat thereby to obtain the getter. The gas is released from itself and activated to be in a gas adsorption state.

Each support 97 does not need to penetrate outside the container. For example, one end of each support 97 is connected to a non-evaporable getter 90 to 96 connected in a square ring by welding or the like. May be embedded in the back panel 2.

The support 94 is a non-evaporable getter 90.
Although the non-evaporable getters are connected to the four corners to support the non-evaporable getters, the number and the like are not limited to these. Also, similarly to the activation by the electric heating, if the gas release from the non-evaporable getter itself generated during heating is not a problem, the inside of the container is evacuated and the exhaust pipe is sealed and then heated. It may be activated.

In this way, by disposing the non-evaporable getters 90 to 96 in the gap between the electron sources 4 on the back panel side,
There is no need to secure space for getter placement and getter flash around the display surface, and there is no need to increase the external dimensions for getter placement.Especially for large-screen displays configured with display devices arranged in a matrix. It is possible to reduce the pitch between display devices, which is a problem in high definition.

Further, the getter can be heated and activated without separately providing a getter heating electrode. Further, since the non-evaporable getter is mounted so as to float from the rear panel via the support, heat conduction to the rear panel when heating the non-evaporable getter can be suppressed as much as possible.

Embodiment 10 FIG. FIG. 17 shows Embodiment 10
It is a figure showing an example of 1 composition of a flat-panel type display device in which (a) is the top view seen from the display side, and (b) is AA in the same figure.
It is sectional drawing seen from the cross section. In this figure, 101 is a square plate-shaped non-evaporable getter, 102 is a support, 103
Is a through-hole (hole) provided on the non-evaporable getter 101 so as to correspond to each electron source formed on the back panel so that the outer shape is larger than each electron source.

Also, reference numerals 104a to 104c denote getter heating electrodes joined to the upper side of the non-evaporable getter.
a ′ to 104c ′ are getter heating electrodes 104 joined at the lower side of the non-evaporable getter so as to face them;
d to 104f are getter heating electrodes joined to the left side of the non-evaporable getter, and 104d 'to 104f' are getter heating electrodes joined to the right side of the non-evaporable getter so as to face them.

As shown in the figure, the non-evaporable getter 101 in the form of a rectangular plate is floated so as not to come into direct contact with the back panel and each of the getter heating electrodes 104a to 104f and 104a '.
To 104f 'are attached so as to penetrate the rear panel. In addition, a support 102 is joined in a pin shape to several places of the non-evaporable getter (the figure shows the case of nine places) and supports the non-evaporable getter 101. Support 10
2 does not necessarily need to penetrate the back panel 2, and it is sufficient that the tip portion is embedded in the back panel 2.

Here, each getter heating electrode 104a-1
Reference numerals 04f and 104a 'to 104f' each include, for example, a pin-shaped electrode portion 110 and a rectangular joint portion joined to the non-evaporable getter 101 at a portion corresponding to a gap between pixels.

For example, when heating the non-evaporable getter 101 while evacuating the container, first, the getter heating electrodes 104a-104a ', 104b-104
A predetermined current is supplied by an external power supply between b ′ and between 104c and 104c ′. At this time, the current passed is
The non-evaporable getter 101 is heated around the width of the opposing joint, and flows to the opposing sides of the getter heating electrode approximately at the width of the junction.

Next, the getter heating electrode 104d-10
4d ', 104e-104e', and 104f-1
A predetermined current is supplied from an external power supply during the period 04f ', and the non-evaporable getter 101 is heated around the width of the opposing joint. As a result, the non-evaporable getter 101 is heated to a temperature sufficient to activate around the shaded region in FIG.

During the operation of the display device, the electrons emitted from the respective electron sources pass through the through-holes (holes) 103 provided in the non-evaporable getter 101 and hit the corresponding phosphors to emit light.

At this time, the non-evaporable getter 101 can also function as a focusing electrode for applying a predetermined negative potential to suppress and converge the divergence of the electron orbit emitted from the electron source. That is, during operation of the display device, the trajectory of electrons emitted from the electron source toward the phosphor is focused as shown in FIG. 19 by setting the non-evaporable getter 101 to the ground potential or an appropriate negative potential. As a result, it is possible to suppress erroneous light emission due to the divergence of the electron trajectory hitting an adjacent dot.

[0128] In particular, when a high-brightness display is required, and when the voltage of the anode electrode (aluminum bag 9) is operated at a high voltage of several kV, for example, fine dust floating in the vacuum vessel 4 may be a trigger. If a direct discharge occurs between the anode electrode and the electron source 4, the electron source 4 may be broken.

Even in such a case, if the non-evaporable getter 101 is set to the ground potential or an appropriate negative potential to lower its impedance as described above, even if the discharge from the anode electrode occurs, , Electron source 4
Since the discharge path is formed toward the non-evaporable getter 101 at the upper portion, discharge to the electron source 4 can be suppressed directly, and damage to the electron source 4 due to discharge from the anode electrode can be prevented. .

In the tenth embodiment, the non-evaporable getter 101 is configured to be heated by energizing heating. However, the non-evaporable getter 101 can be heated by induction heating by applying a high-frequency magnetic field from the outside. In this case, the getter heating electrode can be omitted. When a high-frequency magnetic field is applied from the outside, an induced current flows through a closed circuit around the hole 105 of the non-evaporable getter 101, and a current is generated at other locations. The evaporable getter 101 is heated.

Further, in each of the above embodiments, the vacuum vessel is formed by hermetically joining the front panel 1, the rear panel 2 and the spacer 3 with a sealing agent such as a low melting point glass. (Gap) between the back panel 2
When the distance is small, the configuration can be made without using the spacer 3. That is, the periphery of both the front panel 1 and the rear panel 2 may be directly sealed with a sealing agent such as low-melting glass so as to have a predetermined interval. In addition, the front panel 1 is formed integrally with the spacer 3,
The spacer portion and the back panel 2 may be sealed.

[0132]

According to the flat panel display device of the present invention, a non-evaporable getter which is activated to be in a state of adsorbing a gas by being heated is provided in one of the electron emission spaces and one of the electron sources. Since it is arranged between the electron source and the adjacent electron source, a getter for securing a large gas adsorption area can be arranged without providing a space for getter arrangement around the display surface. In addition, even when a large-screen display is configured by arranging a plurality of display devices in a matrix, the pixel interval between adjacent display devices can be reduced, and a high-definition large-screen display can be realized. Becomes

In the flat panel display device according to the present invention, the non-evaporable getter can be activated by being energized through the getter electrode, and is supported by the getter electrode while being separated from the rear panel. Heat conduction to the back panel during getter heating can be suppressed.

In the flat panel display device according to the present invention, one terminal is connected to the end of the non-evaporable getter, and the other terminal is pulled out from the periphery of the rear panel to seal the front panel and the rear panel. A pair of getter electrodes fixed to the periphery of the back panel together with the sealing agent at the time of heating and heating by energizing the non-evaporable getter, and the non-evaporable getter is supported by being separated from the back panel by the getter electrode Is done. For this reason, the getter heating electrode taken out from the back of the display device can be eliminated, and the getter heating electrode can be easily fixed in a state separated from the back panel during the sealing process, and can be fixed to the back panel during getter heating. Heat conduction can be suppressed.

In the flat panel display according to the present invention, the non-evaporable getter is energized through the getter electrode, and after the non-evaporable getter is activated, the getter electrode is cut off at the periphery of the back panel. . Therefore, even when a large-screen display is configured by arranging a plurality of display devices in a matrix, the pixel interval between adjacent display devices can be reduced, and a high-definition large-screen display can be realized. It becomes possible.

Further, in the flat panel display according to the present invention, since the non-evaporable getter is arranged in the groove formed on the inner surface of the back panel, it is possible to prevent electrons emitted from the electron source from hitting the non-evaporable getter. It can be prevented or reduced, and unnecessary electric field emission from the non-evaporable getter to the phosphor screen can be suppressed.

Further, in the flat panel display device according to the present invention, the non-evaporable getter is arranged such that the front surface is located behind the electron emission portion of any adjacent electron source. Even when the charge of the non-evaporable getter is prevented by dropping to the ground potential, the influence on the electron trajectory emitted from the electron source can be suppressed.

Further, in the flat panel display device according to the present invention, one terminal is connected to the upper surface of the end of the non-evaporable getter, and the other terminal is pulled out from the peripheral portion of the rear panel to seal the front panel and the rear panel. And a pair of getter electrodes fixed between the front panel and the back panel together with the sealing agent for the non-evaporable getter, and the non-evaporable getter is supported by being separated from the back panel by the getter electrodes. For this reason, the getter electrode taken out from the back of the display device can be eliminated, and
During the sealing step, the getter electrode can be easily fixed in a state of being separated from the back panel, and heat conduction to the back panel during getter heating can be suppressed.

Further, in the flat panel display device according to the present invention, the width of the opening of the groove formed in the back panel is smaller than the width of the inside, and the periphery of the opening of the groove is formed in the non-evaporating portion. It is configured to cover the side surface of the mold getter. For this reason,
The back panel, which is an insulator, is interposed between the end face of the non-evaporable getter and the anode. Even if the end face of the non-evaporable getter is sharp, an unnecessary electric field from the end face of the non-evaporable getter is obtained. Radiation (discharge) can be suppressed.

Further, in the flat panel display device according to the present invention, when the non-evaporable getter is set to the ground potential or an appropriate negative potential during the operation of the display device, the electrons emitted from the electron source toward the phosphor can be obtained. Orbits can be focused, and erroneous light emission due to the divergence of the electron orbits and the impact on adjacent dots can be suppressed.

Further, in the flat panel display device according to the present invention, the non-evaporable getter which is activated to be in a state of adsorbing gas by being heated is connected to any one of the electron sources in the electron emission space. Since it is arranged between the electron source and the adjacent electron source, a getter for securing a large gas adsorption area can be arranged without providing a space for getter arrangement around the display surface. In addition, even when a large-screen display is configured by arranging a plurality of display devices in a matrix, the pixel interval between adjacent display devices can be reduced, and a high-definition large-screen display can be realized. Becomes

Further, in the flat panel display according to the present invention, since the non-evaporable getter is disposed in the hole formed on the inner surface of the cathode panel, it is possible to prevent the electrons emitted from the electron source from hitting the non-evaporable getter. Therefore, unnecessary electric field emission from the non-evaporable getter to the phosphor screen can be suppressed.

Further, in the flat panel display device according to the present invention, since the periphery of the hole of the cathode panel covers the side surface of the non-evaporable getter disposed in the groove, the gap between the end face of the non-evaporable getter and the anode is provided. A cathode panel, which is an insulator, is interposed between the end faces of the non-evaporable getter 5, so that unnecessary electric field emission (discharge) from the end face of the non-evaporable getter 5 can be suppressed even if the end face of the non-evaporable getter is sharp. .

In the flat panel display device according to the present invention, the non-evaporable getter can be activated by being energized through the getter electrode, and is supported by the getter electrode so as to be separated from the rear panel. Heat conduction to the rear panel during getter heating can be suppressed, and the rear panel can be prevented from cracking due to thermal distortion.

In the flat panel display device according to the present invention, one terminal is connected to the end of the non-evaporable getter, and the other terminal is pulled out from the periphery of the rear panel to seal the front panel and the rear panel. A pair of getter electrodes fixed between the front panel and the rear panel together with the sealing agent, and the non-evaporable getter is supported by being separated from the rear panel by the getter electrode. The getter heating electrode that is taken out from the back of the display device that is supported by being separated from the back panel can be eliminated, and the getter heating electrode can be easily fixed in a state of being separated from the back panel during the sealing process. Heat conduction to the back panel during heating can be suppressed.

In the flat panel display according to the present invention, the non-evaporable getter is energized through the getter electrode, and after the non-evaporable getter is activated, the getter electrode is cut off at the peripheral portion of the back panel. Therefore, even when a large-screen display is configured by arranging a plurality of display devices in a matrix, the pixel interval between adjacent display devices can be reduced, and a high-definition large-screen display can be realized. Becomes

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of a flat panel display device according to a first embodiment of the present invention;

FIG. 2 is a diagram illustrating an example of a pixel array in the flat panel display device according to the first embodiment of the present invention;

FIG. 3 is a partially cutaway view showing one configuration example of the electron source shown in FIGS. 1 and 2;

FIG. 4 is a diagram illustrating a configuration example of a flat panel display device according to a second embodiment of the present invention;

FIG. 5 is a diagram illustrating another configuration example of the flat panel display device according to the second embodiment of the present invention;

FIG. 6 is a diagram illustrating a configuration example of a flat panel display device according to a third embodiment of the present invention;

FIG. 7 is a diagram illustrating a configuration example of a flat panel display device according to a fourth embodiment of the present invention;

FIG. 8 is a diagram illustrating an example of a method of activating a non-evaporable getter of a flat panel display device according to a fourth embodiment of the present invention.

FIG. 9 is a diagram illustrating a configuration example of a flat panel display device according to a fifth embodiment of the present invention;

FIG. 10 is a diagram illustrating a configuration example of a flat panel display device according to a sixth embodiment of the present invention;

FIG. 11 is a diagram showing another configuration example of the flat panel display device according to the sixth embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a non-evaporable getter of a flat panel display according to a seventh embodiment of the present invention;

FIG. 13 is a sectional view showing another mounted state of another non-evaporable getter of the flat panel display device according to the seventh embodiment of the present invention.

FIG. 14 is a configuration diagram showing a main part of a non-evaporable getter of a flat panel display device according to an eighth embodiment of the present invention.

FIG. 15 is a diagram illustrating a configuration example of a flat panel display device according to a ninth embodiment of the present invention;

FIG. 16 is a diagram showing another configuration example of the flat panel display device according to the ninth embodiment of the present invention.

FIG. 17 is a diagram showing another configuration example of the flat panel display device according to the tenth embodiment of the present invention.

FIG. 18 is a diagram illustrating a heating state of a non-evaporable getter of a flat panel display device according to Embodiment 10 of the present invention.

FIG. 19 is a diagram showing an electron focusing state of a non-evaporable getter of a flat panel display device according to Embodiment 10 of the present invention.

FIG. 20 is a configuration diagram of a conventional flat panel display device.

FIG. 21 is an external view of a display device for a large screen display.

FIG. 22 is a diagram showing an arrangement state of display devices in a large screen display.

FIG. 23 is a pixel array diagram of a display device for a large screen display.

FIG. 24 is a diagram showing an inter-pixel pitch in an arrangement state of the display device for a large screen display.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Front panel, 2 Back panel 3 Spacer glass, 4 Electron source 5 Non-evaporable getter, 6 Getter heating electrode 7 Exhaust pipe, 8 Phosphor 9 Aluminum film, 10 Cold cathode 20 Non-evaporable getter, 22 Non-evaporable getter Reference Signs List 40 groove, 30 getter heating electrode 50 getter heating electrode, 60 cathode panel 61 grooved hole 610 grooved through hole 62 getter heating electrode 70 groove, 80 protrusion 90-96 non-evaporable getter, 101 non-evaporation Type getter 103 Through hole 104 Getter heating electrode

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kozaburo Shibayama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation

Claims (15)

[Claims] 1. A front panel comprising a front panel on which a phosphor is formed, and a rear panel disposed opposite to the front panel and having a plurality of electron sources for emitting electrons to the phosphor. In a flat panel display device which forms an electron emission space by applying a vacuum between the panels, a non-evaporable getter activated to a state of adsorbing a gas by being heated is provided in the electron emission space, A flat panel display device, which is disposed between any one of the electron sources and an electron source adjacent thereto. 2. A non-evaporable getter having a band-like or wire-like shape, penetrating the rear panel, one terminal being connected to an end of the non-evaporable getter, and the other terminal being connected to the rear panel. The non-evaporable getter is provided with a pair of getter electrodes exposed from the outer surface, and the non-evaporable getter is activated by being energized through the getter electrode, and is supported by the getter electrode at a distance from the rear panel. Item 2. A flat panel display device according to item 1. 3. A non-evaporable getter having a band-like or wire-like shape, one terminal being connected to an end of the non-evaporable getter, and the other terminal being pulled out from a peripheral portion of the rear panel, and A non-evaporable getter is provided with a pair of getter electrodes fixed to the peripheral portion of the back panel together with a sealing agent for sealing the back panel. The flat panel display device according to claim 1, wherein the flat panel display device is supported by being spaced apart from the back panel. 4. The non-evaporable getter is energized through the getter electrode, and after the non-evaporable getter is activated, the getter electrode is cut at a peripheral portion of the back panel. The flat panel display device as described in the above. 5. A non-evaporable getter having a band-like or wire-like shape, wherein a groove is formed on the inner surface of the back panel between any one of the electron sources and an electron source adjacent thereto. The flat panel display according to claim 1, wherein a non-evaporable getter is arranged in the groove. 6. The flat panel display device according to claim 5, wherein the non-evaporable getter is arranged such that a front surface thereof is located rearward of an electron emission portion of any adjacent electron source. 7. One of the terminals is connected to the front surface of the end of the non-evaporable getter, and the other terminal is pulled out from the periphery of the rear panel, and the front panel is sealed together with a sealing agent for sealing the front panel and the rear panel. The flat panel display according to claim 6, further comprising a pair of getter electrodes fixed between the rear panel and the back panel, wherein the non-evaporable getter is supported by the getter electrode while being separated from the rear panel. 8. A groove formed in the back panel has a width of an opening smaller than an inner width of the groove. A non-evaporable getter is arranged inside the groove, and a peripheral edge of the opening of the groove is formed. 6. The flat panel display according to claim 5, wherein the cover covers a side surface of the non-evaporable getter. 9. The non-evaporable getter has a flat plate shape,
A through hole is formed in the non-evaporable getter corresponding to the position of the electron source formed on the back panel, facing the front panel and ahead of the rear panel. The perimeter of the through hole is formed outside the trajectory of the electron from the time it is emitted until it reaches the corresponding phosphor, and it is formed in a size that is located outside, and penetrates the back panel, and one terminal is connected to the non-evaporable getter. 2. The flat panel display according to claim 1, wherein the other terminal includes a pair of getter electrodes exposed from an outer surface of the back panel. 10. A front panel on which a phosphor is formed, a rear panel disposed opposite to the front panel, and disposed inside the rear panel opposite to the front panel to emit electrons to the phosphor. In a flat panel display device comprising a cathode panel on which a plurality of electron sources are formed, and a vacuum is formed between the front panel and the rear panel to form an electron emission space, the device is activated to a state in which a gas is adsorbed by being heated. A flat panel display device, wherein a non-evaporable getter to be formed is disposed in an electron emission space and between any one of the electron sources and an electron source adjacent thereto. 11. A non-evaporable getter having a band-like or wire-like shape, and a groove-like hole is formed between an electron source and an adjacent electron source on an inner surface of a cathode panel. The flat panel display device according to claim 10, wherein the non-evaporable getter is formed and arranged in the groove-shaped hole. 12. The non-evaporable getter has a band-like or wire-like shape, and the cathode panel has a groove-like through hole formed between any one of the electron sources and an adjacent electron source. A groove wider than the through hole is formed in the rear panel corresponding to the through hole, and a non-evaporable getter is arranged in the groove. The flat panel display according to claim 10, wherein the side surface is covered. 13. The non-evaporable getter has a band-like or wire-like shape, penetrates the back panel, one terminal is connected to an end of the non-evaporable getter, and the other terminal is connected to an outer surface of the back panel. 11. A non-evaporable getter comprising a pair of exposed getter electrodes, wherein the non-evaporable getter is activated by being energized through the getter electrode and is supported by the getter electrode at a distance from the rear panel. 4. The flat panel display device according to 1. 14. A non-evaporable getter having a band-like or wire-like shape, one terminal being connected to an end of the non-evaporable getter, and the other terminal being pulled out from a peripheral portion of a rear panel, and a front panel and a rear surface. A non-evaporable getter is provided with a pair of getter electrodes fixed to the periphery of the rear panel together with a sealing agent for sealing the panel. The flat panel display device according to claim 10, wherein the flat panel display device is supported away from the panel. 15. The non-evaporable getter is energized through the getter electrode, and after the non-evaporable getter is activated, the getter electrode is cut off at the periphery of the back panel. The flat panel display device as described in the above.