JP2004079525A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the assembly of a spacer and enhance positioning accuracy. <P>SOLUTION: The thin plate-shaped spacer 1020 is arranged in a line direction, and extended from a range interposed between regions formed with a cold cathode element 101 and a fluorescent screen 1018 to the outside. A first supporting member 1030 fixed to the both ends of the spacer 1020 is joined with a second supporting member 1033 installed on a rear plate 1015. The first supporting member 1030 and the second supporting member 1033 are made of an alloy having a coefficient of thermal expansion very near to that of the rear plate 105, and only the outside end part of the first supporting member 1030 is welded to the second supporting member 1033. A GND electrode 1020f of the spacer 1020 and the first supporting member 1030 are electrically joined. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to an image display device having a spacer.

Some conventional image display devices include a support member called a spacer inside an airtight container containing an image display member. For example, a liquid crystal display device, a plasma display device, an EL display device, an electron beam display device, and the like.

電子 An electron beam display device will be described below as an example of an image display device including the spacer.

FIG. 20 is a perspective view showing an example of a display panel portion of a flat-panel image display device using a cold-cathode type electron-emitting device, in which a part of the panel is cut away to show the internal structure. . The rear plate 3115, the side walls 3116, and the face plate 3117 form an envelope (airtight container) for maintaining the inside of the display panel at a vacuum.

基板 A substrate 3111 is fixed to the rear plate 3115. On this substrate 3111, N × M cold cathode elements 3112 are formed in a matrix. (N and M are positive integers of 2 or more, and are appropriately set according to the target number of display pixels.) Further, as shown in FIG. The row wirings 3113 and the N column wirings 3114 are wired. The part constituted by the substrate 3111, the cold cathode type electron-emitting device 3112, the row direction wiring 3113 and the column direction wiring 3114 is called a multi electron beam source. In addition, an insulating layer (not shown) is formed between at least the portions where the row wirings 3113 and the column wirings 3114 intersect, so that electrical insulation is maintained.

On the lower surface of the face plate 3117, a phosphor film 3118 made of a phosphor is formed, and phosphors (not shown) of three primary colors of red (R), green (G), and blue (B) are separately applied. I have. Further, a black body (not shown) is provided between the respective color phosphors forming the fluorescent film 3118, and a metal back 3119 made of Al or the like is formed on the surface of the fluorescent film 3118 on the rear plate 3115 side. ing.

Dx1 to DxM, Dy1 to DyN and Hv are electric connection terminals having an airtight structure provided for electrically connecting the display panel to an electric circuit (not shown). Dx1 to DxM are electrically connected to the row wiring 3113 of the multi electron beam source, Dy1 to DyN are electrically connected to the column wiring 3114 of the multi electron beam source, and Hv is electrically connected to the metal back 3119.

The interior of the hermetic container is maintained at a vacuum of about 1.3 × 10 ⁻³ [Pa], and as the display area of the image display device increases, the rear plate due to the pressure difference between the inside and the outside of the hermetic container increases. Means for preventing deformation or destruction of 3115 and face plate 3117 are required. In FIG. 20, a spacer 3120 made of a relatively thin glass plate and supporting the atmospheric pressure is provided. In this way, the distance between the substrate 3111 on which the multi-beam electron source is formed and the face plate 10173116 on which the fluorescent film 3118 is formed is usually kept at a sub-millimeter to several millimeters, and the inside of the airtight container is kept at a high vacuum as described above. ing.

In the image display apparatus using the display panel described above, when a voltage is applied to each cold cathode element 3112 through the external terminals Dx1 to DxM and Dy1 to DyN, electrons are emitted from each cold cathode element 3112. At the same time, a high voltage of several hundred [V] to several [kV] is applied to the metal back 3119 through the external terminal Hv to accelerate the emitted electrons and collide with the inner surface of the face plate 3117. As a result, the phosphor of each color forming the fluorescent film 3118 is excited and emits light, and an image is displayed.

The number of spacers 3120 required in terms of structure is efficiently arranged. When the spacer 3120 is formed to have a shorter length than the image area and is arranged in the image area, the spacer 3120 is fixed to one or both of the rear plate 3115 and the face plate 3117 using a connection member in the image area.

Also, as disclosed in JP-A-9-179508 and JP-A-2000-251796, in the spacer 3120 longer than the image area, an atmospheric pressure resistant structure can be obtained only by fixing both ends. At this time, there is a method in which a support member is fixed to both ends of the spacer 3120 in advance, and the support member and the rear plate 3115 or the face plate 3117 are fixed using a joining member.

In an image display device including spacers, a plurality of spacers are arranged according to the display area of the display panel and the thickness of the rear plate and face plate substrates, so that as the display area increases, the thickness of the substrate decreases. As the number of spacers increases, the number of spacers also increases. Along with this, the number of man-hours for installing the spacer also increases, and there is a concern that manufacturing costs may increase.

In addition, as described above, the operation of fixing the plurality of spacers or the plurality of support members to the face plate or the rear plate with the connecting members requires more time as the number of spacers increases, and in this respect, the manufacturing is also performed. There is a concern about cost increase.

In addition, in order to make the image quality of the image display device uniform, the accuracy of the fixing position of the spacer needs to be high in units of microns. However, there is a concern that distortion due to expansion of a jig for fixing the spacer may deteriorate the positional accuracy of fixing the spacer due to a heating step of curing a connecting member such as an adhesive used for fixing the spacer.

Further, when the airtight container is formed by heat-sealing the rear plate on which the spacer is disposed and the face plate, or when the image display device is driven, the faceplate or the faceplate in which the spacer and the spacer are fixed is fixed. There is a concern that a dimensional difference may occur between the rear plate and the rear plate due to thermal expansion, and the spacer may be broken.

Therefore, an object of the present invention is to provide an image display device including a spacer having a strong and sufficient supporting function.

Another object of the present invention is to provide an image display device which is excellent in fixed position accuracy and in which the influence of a spacer on a display image is extremely reduced.

Another object of the present invention is to provide an image display device provided with a spacer whose potential is reliably defined.

Another object of the present invention is to provide an image display device in which the risk of collapse or destruction of the spacer due to heat during manufacturing or driving is extremely low.

The present invention described below is preferably applied to, for example, a liquid crystal display device, a plasma display device, an EL display device, an electron beam display device, and the like, which includes a support member called a spacer inside an airtight container containing an image display member. You.

The present invention is an image display device including an airtight container and an image display member and a spacer in the airtight container, wherein the spacer is fixed by welding in the airtight container. Device.

Further, in the image display device of the present invention, the spacer has a potential regulating electrode for regulating the potential of the surface of the spacer, and the potential of the potential regulating electrode is applied to the electrode provided in the hermetic container. Is preferably defined by the welded joint.

In the image display device of the present invention, the spacer is a plate-shaped spacer, and both ends of the plate-shaped spacer in the longitudinal direction are fixed outside the image display area in the airtight container by welding. Is preferred.

Further, in the image display device of the present invention, the spacer has a conductor for defining the potential of the surface of the spacer, and the potential of the conductor is adjusted by welding to an electrode provided in an airtight container. Preferably, it is defined by bonding.

In addition, in the image display device of the present invention, it is preferable that the welding is performed between the conductive first support member disposed on the spacer and the electrode.

In the image display device according to the aspect of the invention, it is preferable that the welding is performed between the conductive first support member disposed on the spacer and the second support member disposed on the electrode. .

Further, the present invention is an image display device including an airtight container, an image display member and a spacer in the airtight container, wherein the spacer is fixed in the airtight container via a metal member. Image display device.

According to the present invention, a first substrate provided with a plurality of electron-emitting devices constituting a vacuum container, and a second substrate disposed opposite to the first substrate and irradiated with electrons emitted from the electron-emitting devices are provided. The first substrate and the second substrate are disposed on one of the first substrate and the second substrate as an atmospheric pressure resistant structure of the vacuum vessel, and are sandwiched between the first substrate and the second substrate. At least one spacer having a longitudinal direction in a direction substantially perpendicular to a direction in which the first substrate and the second substrate face each other, and at least one of a first substrate and a second substrate as a sealed structure of a vacuum vessel In an image display device having a side wall inside one outer peripheral portion,
A first support member that supports the spacer is disposed outside an image display area that is an area between the area of the first substrate on which the electron emission elements are provided and the area of the second substrate on which electrons are irradiated. In addition, the second support member is disposed outside the image display area of one of the first substrate and the second substrate, and the first support member and the second support member are separated from each other. An image display device characterized by being joined.

A preferred embodiment of some of the image display devices of the present invention described above will be described in more detail. A first substrate provided with a plurality of electron-emitting devices provided in a vacuum vessel, A second substrate, which is disposed in the container so as to face the first substrate and is irradiated with electrons emitted from the electron-emitting device, and a first substrate and a second substrate which are used as an atmospheric pressure resistant structure of the vacuum container. At least one of which is disposed on one of the substrates and has a longitudinal direction in a direction substantially perpendicular to the facing direction of the first substrate and the second substrate, sandwiched between the first substrate and the second substrate. An image display device having one spacer and a first substrate as a sealed structure of a vacuum vessel, and a side wall inside an outer peripheral portion of at least one of the second substrate,
A first support member that supports the spacer is disposed outside an image display area that is an area between the area of the first substrate on which the electron emission elements are provided and the area of the second substrate on which electrons are irradiated. In addition, the second support member is disposed outside the image display area of one of the first substrate and the second substrate, and the first support member and the second support member are separated from each other. They are joined together and have the following configuration.

It is conceivable that the first support member and the second support member are made of conductive members.

Furthermore, it is conceivable that the first support member and the second support member are joined by welding. In this case, it is conceivable that the first support member and the second support member are joined by the first joining member.

{Circle around (1)} It is conceivable that the first joining member is selected from the group consisting of a brazing material, a conductive adhesive, and a low-melting-point metal material.

Furthermore, it is conceivable that the electrode formed on the surface of the spacer and the first support member are electrically connected. In this case, it is conceivable that the electrode formed on the surface of the spacer and the first support member are electrically connected via a conductive bonding agent. Alternatively, it is conceivable that the electrode formed on the surface of the spacer and the first support member are electrically joined by the contact of the contact portion provided on the first support member and having a spring characteristic.

Further, the electrode formed on one of the first substrate and the second substrate on which the second support member is installed and the second support member are electrically connected. It is thought that there is. In this case, the electrode formed on one of the first substrate and the second substrate on which the second support member is installed and the second support member have conductivity. It is considered that they are electrically connected via a bonding agent. Alternatively, the electrode formed on one of the first substrate and the second substrate on which the second support member is installed and the second support member are connected to the second support member. It is conceivable that they are electrically joined by the contact of the contact portion having the spring characteristic provided in the above.

Further, the electrode formed on the surface of the spacer and the electrode formed on one of the first substrate and the second substrate on which the second support member is provided are the second substrate. It is conceivable that they are electrically connected via the first support member and the second support member.

{Circle around (4)} The electron-emitting devices are arranged in a matrix and may be connected to a matrix wiring composed of a plurality of row wirings and a plurality of column wirings. In this case, it is considered that the electron-emitting device is a cold cathode device. In particular, it is considered that the cold cathode device has a conductive thin film including an electron-emitting portion between electrodes. Further, it is considered that the cold cathode device is a surface conduction electron-emitting device.

Furthermore, it is conceivable that the spacer is arranged on a wiring for driving the electron-emitting device.

{Circle around (2)} It is conceivable that an image display member that displays an image by irradiating the second substrate with electrons emitted from the electron-emitting device is provided. In this case, the image display member is considered to be a phosphor film containing a phosphor that emits light when electrons emitted from the electron-emitting device collide.

According to the image display device as described above, when installing a large number of spacers on one of the first substrate and the second substrate on which the spacers are installed, welding or brazing of the spacers is performed. By using a low-melting-point metal or the like, it is possible to shorten the ownership time of the spacer assembling process and reduce the number of man-hours for assembling the spacer. Thereby, it is possible to reduce the manufacturing cost of the image display device.

Further, in the case where the spacer is joined by brazing or a low melting point metal, the repair assembling of the spacer can be easily performed, thereby improving the yield of the assembling process of the spacer and providing a highly reliable image display device. It is possible.

Also, since the spacer can be joined by welding, brazing, low-melting metal, etc., the amount of heat applied at the time of joining the spacer can be greatly reduced, and distortion of the spacer assembling apparatus can be eliminated, thereby improving the positioning accuracy of the spacer. This makes it possible to provide a high-quality image display device.

The longitudinal outer end of the spacer of the first support member is located between the spacer joint of the first support member and the second support member. There is a gap in a direction perpendicular to the plane, and by contacting the outer end of the first support member with the second support member, the first support member acts in the direction of pressing the spacer against the substrate. Therefore, no gap is formed between the spacer and the substrate on which the spacer is provided. Accordingly, it is possible to prevent the destruction of the spacer and improve the positional accuracy of the spacer, and to provide a high-quality image display device.

In addition, by joining only the longitudinal outer end of the spacer of the first support member to the second support member, it is possible to reduce a dimensional difference due to thermal expansion between the spacer and the rear plate at the time of panel sealing. Thus, it is possible to prevent the spacer from being destroyed, improve the yield of the spacer assembling process, and provide a highly reliable image display device.

The present invention can also provide an image display device including a spacer having a strong and sufficient supporting function by welding.

According to the present invention, it is possible to provide an image display device which is excellent in positional accuracy of being fixed by welding and has an extremely reduced influence of a spacer on a display image.

According to the present invention, it is possible to provide an image display device including a spacer whose electric potential is reliably defined by welding.

According to the present invention, since the spacer is fixed via the metal member, it is possible to provide an image display device in which the risk of collapse or destruction of the spacer due to heat during manufacturing or driving is extremely small.

Note that an image region or an image display region in this specification refers to a space sandwiched between a display region where an image on an image display substrate is displayed and a region corresponding to a display region of the substrate facing the image display substrate. For example, in the case of an electron beam display device, it refers to a space sandwiched between a region where electrons are emitted and a region where the emitted electrons are irradiated.

According to the present invention, it is possible to provide an image display device including a spacer having a strong and sufficient supporting function.

According to the present invention, it is possible to provide an image display device which is excellent in fixed position accuracy and in which the influence of a spacer on a display image is extremely reduced.

According to the present invention, it is possible to provide an image display device including a spacer whose potential is definitely defined. Further, the present invention can provide an image display device in which the risk of collapse or destruction of the spacer due to heat during manufacturing or driving is extremely low.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a display panel used in one embodiment of the image display device of the present invention, in which a part of the panel is cut away to show the internal structure.

An airtight container (envelope) for maintaining the inside of the display panel at a vacuum is formed by the rear plate 1015 as the first substrate, the side wall 1016 as the frame, and the face plate 1017 as the second substrate. Have been.

Also, since the inside of the hermetic container is kept at a vacuum of 1.33 × 10 ⁻⁴ [Pa] or less, the anti-atmospheric structure is used for the purpose of preventing the hermetic container from being broken by the atmospheric pressure or an unexpected impact. , A spacer 1020 is provided.

基板 A substrate 1011 is fixed to the rear plate 1015, and N × M cold cathode type electron-emitting devices 1012 are formed on the substrate 1011. (N and M are positive integers of 2 or more and are appropriately set according to the target number of display pixels.) Examples of the cold cathode type electron-emitting device include a surface conduction type emission device and an FE type electron emission device. Or MIM type is preferably applied. Further, a fluorescent film 1018 is formed on the lower surface of the face plate 1017.

The phosphors of each color are separately applied in, for example, a stripe shape, and a black conductive material 1010 is provided between the phosphor stripes (see FIG. 18A). The arrangement is not limited to the stripe shape, and may be, for example, a delta arrangement as shown in FIG. 18B or another arrangement (for example, FIG. 18C).

メ タ ル A metal back 1019 known in the field of CRT is provided on the surface of the fluorescent film 1018 on the rear plate 1015 side.

Here, FIG. 19 is a schematic cross-sectional view taken along line A-A ′ of FIG. 1, and the numbers of the respective parts correspond to FIG. In a preferred embodiment, the spacer 1020 is formed by forming a high-resistance film 11 for the purpose of preventing electrification on the surface of the insulating member 1, and inside the face plate 1017 (such as a metal back 1019) and the surface of the substrate 1011 (row). A low-resistance film 21 is formed on the contact surface 3 and the side surface portion 5 of the spacer 1020 facing the direction wiring 1013 or the column direction wiring 1014).

The thin plate-like spacers 1020 are arranged along the row direction (X direction), and extend from a region sandwiched by the cold cathode element 1012 and the phosphor film 1018 to the outside. One support member 1030 is fixed. Further, the first support member 1030 is joined to a second support member 1033 which is provided on the rear plate 1015 in advance.

Here, as the first and second support members 1030 and 1033, preferably, a conductive member or a metal or an alloy is used, and for example, a stainless steel material or an alloy mainly containing Ni and Fe can be considered. The performance required of the first support member 1030 is that its thermal expansion coefficient is close to that of the spacer 1020 or the member forming the substrate.

First, an example of the configuration of the spacer 1020, the first support member 1030, the rear plate 1015, and the second support member 1033 will be described with reference to FIGS.

2A is a top view of the rear plate, FIG. 2B is a side sectional view, FIG. 3A is a top view of the rear plate to which the second support member is attached, and FIG. Is a sectional view thereof. In the image display area of the rear plate 1015, there are provided a row wiring 1013 and a column wiring 1014 for driving an electron source that emits electrons, and insulation for electrically insulating the row wiring 1013 and the column wiring 1014 from each other. A layer 1050 has been formed. Outside the image display area in the longitudinal direction (X direction) of the row direction wiring 1013 of the rear plate 1015, a row direction wiring 1013, an insulating layer 1051, and a potential regulating electrode whose potential is regulated to a constant potential are formed. Have been. Here, the potential regulating electrode is preferably a ground (GND) electrode 1025. The second support member 1033 is fixed on the GND electrode 1025 by the third joint member 1055. Here, when a conductive bonding member is used as the third bonding member 1055 and a conductive member or a metal or an alloy is used as the second support member 1033 as described above, the GND electrode 1025 and the second support member are used. 1033 is electrically connected. As described above, the electrical connection may be made by imparting conductivity to the third joining member 1055 used when fixing the second support member 1033 to the rear plate 1015. A part of the second support member 1033 may be formed in a leaf spring shape (leaf spring shape portion 1034, see FIG. 13) and directly contacted with the GND electrode 1025 of the rear plate 1015. When the potential regulating electrode is formed on the face plate 1017, the second support member 1033 may be formed outside the image display area of the face plate 1017.

Next, the spacer 1020 and the first support member 1030 will be described with reference to FIGS. 4 and 5A are side views of the spacer 1020 and the first support member 1030 as viewed from the Y direction, and FIG. 5B is a side view as viewed from the X direction. As shown in FIG. 4, a GND electrode 1020f, which is a potential regulating electrode whose potential is regulated to a constant potential, is formed on both end surfaces of the spacer 1020 to stabilize the equipotential surface in the image display area. Preferably, the potential regulating electrode is regulated to a ground potential. Further, the spacer 1020 and the first support member 1030 are fixed using the second joining member 1053. At this time, the above-mentioned conductive member or metal or alloy is used as the first support member 1030, and the conductive joint member is used as the second joint member 1053, so that the potential of the GND electrode 1020 f is reduced by the first support member 1030. Further, as described above, the second support member 1033 and the third joining member 1055 are also made conductive, so that the potential of the GND electrode 1020f is set to the potential defining electrode. It is possible to define via 1025. Further, the GND electrode 1020f of the spacer 1020 and the first support member 1030 may be in direct electrical contact. Further, a predetermined space 1030b is provided on a plane 1020d including a surface of the spacer 1020 facing the spacer installation surface of the rear plate 1015 and a surface 1030a of the first support member 1030 facing the spacer installation surface of the rear plate 1015. . As the material of the first support member 1030, similarly to the second support member 1033, an alloy mainly composed of, for example, Ni or Fe having a very close thermal expansion coefficient to the rear plate is used.

Next, the joining of the rear plate 1015 and the spacer 1020 will be described with reference to FIGS.

As shown in FIG. 6, the spacer 1020 is aligned by a spacer assembling apparatus (not shown) on the center of the row wiring 1013 in the image display area of the rear plate 1015 so as to be perpendicular to the plane of the rear plate 1015. You. At this time, the first support member 1030 previously joined to both ends of the spacer 1020 by the second joining member 1053 is placed on the second support member 1033 disposed on the rear plate 1015 by a predetermined amount. It is arranged through space. As a result, both the first support member 1030 and the second support member 1033 are arranged outside the image display area.

Further, as shown in FIG. 7, the first support member 1030 is bent by pushing the opposite side of the spacer joint portion of the first support member 1030 in the −Z direction, so that the first support member 1030 has a spacer. Only the outer longitudinal end of 1020 is brought into contact with the second support member 1033. In this state, the first support member 1030 and the second support member 1033 are welded at the welded joint 1054. Accordingly, the spacer 1020 can be reliably disposed at a predetermined position on the rear plate 1015 in a short time without any gap between the rear plate 1015 and the spacer 1020.

As shown in FIG. 8, the first support member 1030 and the second support member 1033 can be joined by the first joining member 1052.

As the first joining member 1052, a low-melting metal such as solder or indium, a noble metal solder for vacuum specified in JIS, a conductive inorganic adhesive, or the like can be used. Note that the performance required of the first bonding member 1052 is that generation of unnecessary gas in a vacuum is small.

Next, an example of a procedure for creating an image display device will be described with reference to FIGS. 9A to 9E.
(1) First, as shown in FIG. 9A, outside the image display area in the longitudinal direction (X direction) of the row direction wiring 1013 on the rear plate 1015, as described above, the row direction wiring 1013 and the insulating layer 1051 , A GND electrode 1025, and a second support member 1033 is fixed on the GND electrode 1025 by a third joining member 1055. At this time, the GND electrode 1025 and the second support member 1033 are electrically connected. The electrical connection may be made by imparting conductivity to the third joining member 1055 used when fixing the second support member 1033 to the rear plate 1015, or the second support member. A part of 1033 may be formed in a leaf spring shape and directly contacted with the GND electrode 1025 of the rear plate 1015.
(2) Next, as shown in FIG. 9B, the support members 1030 are fixed to both ends of the spacer 1020 by the third joining members 1055. A space is provided between a flat surface 1020d of the spacer 1020 including a surface facing the spacer mounting surface of the rear plate 1015 and a surface 1030a of the support member 1030 facing the spacer mounting surface of the rear plate 1015. It is desirable that the size of this space is slightly larger than the thickness of the second support member 1033 arranged on the rear plate 1015. Further, a GND electrode 1020f is formed on both ends of the spacer 1020, and the GND electrode 1020f and the first supporting member 1030 are in direct contact with each other or electrically connected via the second bonding member 1053. Have been.
(3) Next, as shown in FIG. 9C, a process of aligning the spacer 1020 and the support member 1030 at predetermined positions on the rear plate 1015 using the spacer assembling apparatus 1060 will be described. The spacer assembling apparatus 1060 includes a substrate table 1061 for supporting the rear plate 1015 and a spacer clamp unit 1062 for clamping the spacer 1020. The perpendicularity between the plane of the substrate table 1061 and the spacer clamp surface of the spacer clamp unit 1062 is 90. It is adjusted within ± 0.1 degrees. This spacer clamp unit 1062 clamps the vicinity of the support member 1030 fixing portion of the spacer 1020 to align the spacer 1020 with a predetermined position of the rear plate 1015 supported on the substrate table 1061.
(4) Next, as shown in FIG. 9D, the first support member 1030 is pushed in the −Z direction on the opposite side of the spacer joining portion to bend the first support member 1030, whereby the first support member 1030 is bent. Only the longitudinally outer end of the spacer 1020 of the support member 1030 is brought into contact with the second support member 1033. In this state, the first support member 1030 and the second support member 1033 are welded at the welded joint 1054. As a result, the spacer 1020 is joined and fixed at a predetermined position on the rear plate 1015. Then, after the joining of the first support member 1030 and the second support member 1033 is completed, the spacer clamp unit 1062 of the spacer assembling apparatus 1060 releases the clamp at substantially both ends of the spacer 1020.
(5) Next, panel sealing between the face plate 1017 and the rear plate 1015 will be described with reference to FIG. These panel sealing is performed by disposing a spacer 1020 and a side wall 1016 between the face plate 1017 and the rear plate 1015 as shown in FIG. The side wall 1016 is almost the same as the spacer 1020 but has a slightly lower height. Therefore, the gap between the face plate 1017 and the rear plate 1015 is defined by the height of the spacer 1020. The sealing of the side wall 1016, the face plate 1017, and the rear plate 1015 is mainly performed using frit glass. The frit glass is disposed between the rear plate 1015 and the side wall 1016 and between the side wall 1016 and the face plate 1017. As a sealing method, a frit glass is applied to a position where the rear plate 1015 and the side wall 1016 of the face plate 1017 are in contact with each other, and the surface of the rear plate 1015 and the side surface of the face plate 1017 that is in contact with the side wall 1016 reaches about 400 ° C. The face plate 1017 and the rear plate 1015 are heated from outside. Thereafter, the face plate 1017 is brought close to the rear plate 1015 so as to be substantially parallel to the plane of the rear plate 1015, and both are pressurized and cooled. Thereafter, the enclosed space surrounded by the face plate 1017, the rear plate 1015, and the side wall 1016 is evacuated.

As described above, the first support member 1030 made of metal is fixed to both ends of the spacer 1020 longer than the image area in advance, and furthermore, the metal first support member 1030 is provided at a predetermined position on the rear plate 1015. Two support members 1033 are arranged, and the first support member 1030 and the second support member 1033 are fixed by a first bonding member 1052 having conductivity such as welding or brazing material.

As described above, the first support member 1030 joined to both ends of the spacer 1020 and the second support member 1033 arranged at a predetermined position on the rear plate 1015 are connected to each other by welding or brazing. By joining using the one joining member 1052, the spacer 1020 can be arranged on the rear plate 1015 in a short time. Thereby, it is possible to reduce the manufacturing cost of the image display device.

Further, when the first and second support members 1030 and 1033 are joined by a brazing material, the repair assembly of the spacer 1020 can be easily performed, so that the yield of the assembly process of the spacer 1020 can be improved and the manufacturing cost can be reduced. It is possible.

Further, since the joining of the spacer 1020 can be performed by welding, brazing, low-melting metal, or the like, the amount of heat applied at the time of joining the spacer 1020 can be greatly reduced, and distortion of the spacer assembling apparatus is eliminated, and the positional accuracy of the spacer 1020 is improved. Can be achieved. This makes it possible to provide a high-quality image display device.

Further, the first support member 1030 used for joining the spacer 1020 and the second support member 1033 joined to the GND electrode 1025 of the rear plate 1015 are conductive metal plates, and Since the second supporting members 1030 and 1033 are joined by welding at the welding joint portion 1054 or by the first joining member 1052 having conductivity, the mechanical joining of the spacer 1020 and the GND electrode 1020f of the spacer 1020 and the rear plate 1015 Electrical connection of the GND electrode 1025 can be performed simultaneously. Thereby, the spacer assembling process can be simplified, and the manufacturing cost can be reduced.

Further, the outer end in the longitudinal direction of the spacer 1020 of the first support member 1030 is between the spacer joint of the first support member 1030 and the second support member 1033, and is located on the installation surface of the spacer 1020. The first support member 1030 presses the spacer 1020 against the rear plate 1015 by providing a gap in the direction orthogonal to the first support member 1030 and bringing the outer end of the first support member 1030 into contact with the second support member 1033. And no gap is created between the spacer 1020 and the rear plate 1015. Accordingly, it is possible to prevent the spacer 1020 from being broken at the time of panel sealing, improve the positional accuracy of the spacer 1020, and provide a high-quality image display device.

In addition, heating at the time of panel sealing is performed by a sheet heater, a heater lamp, or the like from a surface opposite to a surface of the rear plate 1015 and the face plate 1017 which is in contact with the closed space. When the temperature of the rear plate 1015 increases, a dimensional difference occurs between the spacer 1020 and the rear plate 1015 due to thermal expansion, and there is a problem that the spacer 1020 is pulled and broken in the longitudinal direction. In this regard, the first support member 1030 joined to the spacer 1020 is made of a metal material having a good thermal conductivity to easily receive the heat of the rear plate 1015, and the spacer 1020 of the first support member 1030 By joining only the outer end in the longitudinal direction to the second support member 1033, the first support member 1030 undergoes thermal expansion in the direction toward the center of the spacer 1020 in the longitudinal direction, and the first support member 1030 and the spacer 1020 at the time of temperature rise The dimensional difference due to thermal expansion between the rear plates 1015 could be compensated. As described above, by preventing the spacer 1020 from being destroyed, it is possible to improve the yield of the assembling process of the spacer 1020 and to provide a highly reliable image display device.

The support member of the spacer 1020, the rear plate 1015, and the joining method thereof described in the above embodiment will be described in detail with specific materials and numerical examples, but the present invention is not limited to these examples. is not.
(First embodiment)
In this embodiment, a case where the display panels shown in FIGS. 1 to 7, 12, and 14 are manufactured will be described.

First, as shown in FIG. 1, a row direction wiring 1013, a column direction wiring 1014, an interelectrode insulating layer (not shown), and device electrodes of a surface conduction electron-emitting device 1012 and a conductive thin film were formed on a substrate 1011 in advance. . The image display area of this display device is 280 mm × 210 mm.

Next, a spacer 1020 (see FIG. 1), which is an atmospheric pressure resistant structure of the display panel, was manufactured using an insulating member (300 mm × 2 mm × 0.2 mm) made of soda lime glass. The spacer 1020 was formed into a long one having a cross section of 2 mm × 0.2 mm by a heat stretching method and cut as needed.

A high-resistance film, which will be described later, is formed on four surfaces (300 × 2 and 300 × 0.2 front and back surfaces) of the surface of the spacer 1020 in the image display area of the airtight container, and a face plate 1017 and a rear plate 1015 are formed. Area (280 × 0.2) and an area (280 × 0) from the side of the 280 × 2 face contacting the face plate 1017 and the rear plate 1015 to a height of 0.1 mm. In 1), a conductive film was formed. In addition, conductive films were formed on four surfaces near both ends of the spacer 1020 with an insulating distance of 2 mm from the conductive film formed in the image display formation region.

(4) As the high resistance film, a Cr—Al alloy nitride film (200 nm thick, about 109 [Ω / □]) formed by simultaneously sputtering a Cr and Al target with a high frequency power supply was used. The conductive film provided in the image area serves to secure electric connection between the high-resistance film formed on the spacer 1020 and the face plate 1017, and between the high-resistance film and the rear plate 1015. The purpose is to control the trajectory of the electron beam from the electron-emitting device by suppressing it. In addition, the conductive film provided outside the image region is electrically connected to a GND electrode 1025 provided outside the image region of the rear plate 1015 as a GND electrode 1020f.

材質 As a material of the first support member 1033, an alloy having a thermal expansion coefficient extremely close to that of the rear plate 1015, such as Ni or Fe, is used. As shown in FIG. 10, the shape of the first support member 1030 is 5 × 3 mm (length, width), 0.1 mm (thickness), and a groove 1031 (0.25 mm) into which the spacer 1020 enters in the center. It is formed with a length of 1.5 mm.

材質 The material of the second support member 1033 is an alloy having a thermal expansion coefficient extremely close to that of the rear plate 1015, for example, an alloy mainly containing Ni or Fe. As shown in FIG. 12, the shape of the second support member 1033 is □ 3 mm (length, width) and 0.1 m (thickness).

As shown in FIGS. 2 and 3, the row direction wiring 1013 in which the spacer 1020 in the image display area of the rear plate 1015 contacts, and the substrate of the portion where the second support member 1033 outside the image display area of the rear plate 1015 is fixed The thickness in the plate thickness direction is configured to be substantially the same. Further, a GND electrode 1025 is formed in a portion where the second support member 1033 is fixed.

無機 For the second joining member 1053, a conductive inorganic adhesive containing a Ni filler having a diameter of about 0.02 mm was used.

に は For the third joining member 1055, a conductive inorganic adhesive containing a Ni filler having a diameter of about 0.02 mm was used.

ス ポ ッ ト Spot welding was used as the method for welding the first and second support members 1030 and 1033. Laser welding can be considered as another welding method. Since these welding methods are performed by local heating, the spacers 1020 and the rear plate 1015 are not thermally affected.

As shown in FIGS. 4 and 5, grooves (width: 0.25 mm, length: 1.5 mm) provided at the center of the first support member 1030 are inserted into both ends of the spacer 1020, and the second joint member 1053 is inserted. Fix with. At this time, the GND electrode 1020f of the spacer 1020 and the first support member 1030 are electrically connected via the second connection member 1053.

Also, a plane 1020d including a surface of the rear plate 1015 facing the spacer installation surface and a surface 1030a of the first support member 1030 facing the spacer installation surface of the rear plate 1015 are provided with a plate of the second support member 1033. The space is provided by the same size as the thickness.

As shown in FIGS. 2 and 3, the second support member 1033 is electrically insulated on the GND electrode 1025 outside the image display area on the extension of the row wiring in which the spacer 1020 in the image display area of the rear plate 1015 contacts. Using frit glass. A point to be noted at the time of joining is that a leaf spring-shaped portion 1034, which is a contact spring of the second support member 1033, is arranged on the GND electrode 1025 of the rear plate 1015, and the two are electrically joined. .

組 立 The assembly of the spacer 1020 and the rear plate will be described with reference to FIGS.

The spacer 1020 abuts on the center of the row wiring 1013 in the image display area of the rear plate 1015 so as to be substantially vertical by the spacer assembling apparatus. By pushing in the −Z direction and bending the first support member 1030, only the longitudinally outer end of the spacer 1020 of the first support member 1030 is placed on the rear plate 1015 so that the second support member 1033 is disposed. Contact with At this time, since the first support member acts in a direction of pressing the spacer 1020 against the rear plate 1015, no gap is generated between the spacer 1020 and the rear plate 1015. Further, in this state, the first support member 1030 and the second support member 1033 are joined by spot welding at the welding joint portion 1054. As a result, the spacer 1020 is joined and fixed at a predetermined position on the rear plate 1015. At this time, the GND electrode 1020f of the spacer 1020 and the GND electrode 1025 of the rear plate 1015 are electrically connected.

(1) Thereafter, as shown in FIG. 1, a side wall 1016 was set on the rear plate 1015 via a frit glass, and a frit glass was applied to a portion of the side wall 1016 where the face plate 1017 should be in contact. The face plate 1017 is provided on its inner surface with a phosphor film 1018 and a metal back 1019 made of stripe-shaped phosphors extending in the column wiring (Y direction).

The plane of the face plate 1017 and the plane of the rear plate 1015 are parallel to each other and approached, and the side wall 1016, the face plate 1017, and the rear plate 1015 are joined and sealed by baking at 400 ° C. to 500 ° C. for 10 minutes or more. .

The interior of the hermetically sealed container completed as described above is evacuated by a vacuum pump through an exhaust pipe, and after reaching a sufficient degree of vacuum, the row direction wiring 1013 and the column direction wiring are passed through the external terminals DX1 to Dxm and DY1 to DYn. The multi-electron beam source was manufactured by supplying power to each element via 1014 and performing the energization forming process and the energization activation process described in the above embodiment.

Next, at a degree of vacuum of about 1.33 × 10 ⁻⁴ [Pa], an exhaust pipe (not shown) was heated by a gas burner and welded to seal the envelope (airtight container).

(4) Finally, gettering was performed to maintain the degree of vacuum after sealing.

In the image display device, the display panel as shown in FIG. 1 completed as described above is connected to each of the cold cathode devices (surface conduction electron-emitting devices) 1012 through external terminals DX1 to Dxm and DY1 to DYn. A scanning signal and a modulation signal are applied by signal generation means (not shown) to emit electrons, and a high voltage is applied to a metal back 1019 through a high voltage terminal Hv to accelerate an emitted electron beam, thereby causing a fluorescent film 1018 to be emitted. An image was displayed by causing electrons to collide with each other to excite and emit phosphors of each color. The applied voltage Va to the high voltage terminal Hv was 3 [kV] to 10 [kV], and the applied voltage Vf between the wirings 1013 and 1014 was 14 [V].

At this time, a row of light-emitting spots are formed two-dimensionally at equal intervals, including light-emitting spots generated by electrons emitted from the cold cathode elements 1012 located close to the spacer 1020, and a clear, color-reproducible color image can be displayed. Was.
(Second embodiment)
Another assembly example of the above embodiment will be described with reference to FIGS.

と し て As the first support member 1030, for example, a stainless material, an alloy mainly composed of Ni and Fe, or the like can be considered. The performance required of the first support member 1030 is that its thermal expansion coefficient is close to that of the spacer 1020 or the member forming the substrate.

As shown in FIG. 11, the shape is 5 × 3 mm (length, width), 0.1 mm (thickness), and a groove 1031 (0.25 mm) into which the spacer 1020 enters is 1.5 mm long at the center. Further, a spring-shaped portion 1032 is provided for the purpose of making electrical contact with the GND electrode 1020f of the spacer 1020.

材質 The material of the second support member 1033 was the same as that of the first support member 1030.

As the shape, as shown in FIG. 13, a spring-shaped portion 1034 is provided on the outer side of 3 mm (length, width) for the purpose of making contact with the rear plate 1015 and the GND electrode 1025. The plate thickness is 0.1 mm as in the case of the first support member 1030.

As shown in FIGS. 2 and 3, a portion of the rear plate 1015 where the spacer 1020 is in contact with the spacer 1020 in the row direction wiring 1013 a and a portion where the second support member 1033 outside the image display region of the rear plate 1015 is fixed. The thickness in the thickness direction of the substrate is configured to be substantially the same. Further, a GND electrode 1025 is formed in a portion where the second support member 1033 is fixed.

ろ う Further, as the first joining member 1052, a brazing material such as solder was used. The brazing material used here hardly degass in a vacuum and is well wetted by the first and second support members 1030 and 1033.

無機 For the second joining member 1053, an inorganic adhesive containing alumina as a base material was used. This second joining member 1053 is insulative.

無機 For the second joining member 1053, an inorganic adhesive containing alumina as a base material was used. This second joining member 1053 is insulative.

組 立 The assembly of the spacer 1020 and the first support member will be described with reference to FIG.

溝 A groove (width: 0.25 mm, length: 1.5 mm) provided at the center of the first support member 1030 is inserted into both ends of the spacer 1020 and fixed by the second joint member 1053. At this time, the spring-shaped portion 1032, which is a contact spring portion of the first support member 1030, is brought into direct contact with the GND electrode 1020f of the spacer 1020, so that both are electrically connected. The plane 1020d including the surface of the rear plate 1015 facing the spacer installation surface and the surface 1030a of the first support member 1030 facing the spacer installation surface of the rear plate 1015 have a thickness smaller than that of the second support member 1033. A slightly larger space is provided.

Next, assembly of the spacer 1020 and the first support member will be described with reference to FIG.

(4) The second support member 1033 was bonded to the GND electrode 1025 outside the image display area on the extension of the row wiring in the image display area of the rear plate 1015 in contact with the spacer 1020 using conductive frit glass. At this time, the GND electrode 1025 of the rear plate 1015 and the second support member 1033 are electrically connected via the conductive frit glass.

The spacer 1020 abuts on the center of the row wiring 1013 in the image display area of the rear plate 1015 so as to be substantially perpendicular to the center by the spacer assembling apparatus. As shown in FIG. 16, in this state, the outer end in the longitudinal direction of the spacer 1020 of the first support member 1030 and the second support member 1033 are joined by the first joining member 1052. As a result, the spacer 1020 is joined and fixed at a predetermined position on the rear plate 1015.

By this bonding, the GND electrode 1020f of the spacer 1020 and the GND electrode 1025 of the rear plate 1015 are electrically bonded.

The sealing of the rear plate and the face plate, the electron source process and the sealing are the same as in the first embodiment.
(Third embodiment)
Another assembly example of the above embodiment will be described with reference to FIG.

ＹAs the other shape of the first support member 1030, as shown in FIG. 17, a Y-shape can be considered. In this case, the spacer 1020 is inserted into the Y-shaped groove and joined. The bonding may be performed by the third bonding member 1055, or the spacer 1020 may be clamped by the Y-shaped first support member 1030.

材質 The material of the second support member 1033 was the same as that of the first support member 1030.

As the shape, as shown in FIG. 17, the rear plate 1015 has a surface parallel to the image display surface and a surface perpendicular to the surface.

The spacer 1020 is brought into contact with the center of the row wiring 1013 in the image display area of the rear plate 1015 so as to be substantially vertical by the spacer assembling apparatus. In this state, as shown in FIG. 17, the outer end in the longitudinal direction of the spacer 1020 of the first support member 1030 and the second support member 1033 are joined by welding or the first joining member 1052. As a result, the spacer 1020 is joined and fixed at a predetermined position on the rear plate 1015. Further, by this joining, the GND electrode 1020f of the spacer 1020 and the GND electrode 1025 of the rear plate 1015 are electrically joined.

Other configurations and steps are the same as those of the first embodiment.

FIG. 2 is a perspective view of a display panel of an image display device to which the present invention can be applied, with a part thereof cut away. 2A and 2B are diagrams illustrating the rear plate of FIG. 1, wherein FIG. 1A is a plan view and FIG. 2A and 2B are diagrams illustrating a rear plate and a second support member of FIG. 1, wherein FIG. 1A is a plan view and FIG. FIG. 2 is a side view in the X direction illustrating the spacer of FIG. 1. 5A and 5B are side views illustrating a spacer and a first support member of FIG. 1, wherein FIG. 5A is a side view in a Y direction, and FIG. FIG. 2 is a cross-sectional view illustrating a positional relationship between a rear plate, a spacer, and first and second support members in FIG. 1. FIG. 2 is a cross-sectional view illustrating a positional relationship between a rear plate, a spacer, and first and second support members in FIG. 1. FIG. 3 is a cross-sectional view illustrating another positional relationship between the rear plate and the spacer of FIG. 1 and first and second support members. FIG. 2 is a diagram illustrating a panel assembling step of FIG. 1. FIG. 2 is a diagram illustrating a first support member of FIG. 1. FIG. 4 is a diagram illustrating another shape of the first support member in FIG. 1. FIG. 2 is a diagram illustrating a second support member of FIG. 1. FIG. 4 is a diagram illustrating another shape of the second support member in FIG. 1. It is a sectional side view explaining other shapes of the spacer and the 1st support member of FIG. 1, (a) is an X direction, (b) is a side view in the Y direction. 2A and 2B are diagrams illustrating another positional relationship between the rear plate and the second support member in FIG. 1, wherein FIG. 2A is a plan view and FIG. FIG. 4 is a cross-sectional view illustrating another positional relationship between the rear plate and the spacer of FIG. 1 and first and second support members. FIG. 2 is a perspective view showing another positional relationship between the rear plate and the spacers of FIG. 1 and first and second support members. FIG. 2 is a plan view illustrating a phosphor array of a face plate of the display panel illustrated in FIG. 1. FIG. 2 is a schematic cross-sectional view along AA in FIG. 1. It is the perspective view which cut out and showed some display panels of the conventional image display device.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Insulating member 3 Contact surface 5 Side surface part 11 High resistance film 21 Low resistance film 1010 Conductive material 1011 Substrate 1012 Cold cathode element 1013 Row direction wiring 1014 Column direction wiring 1015 Rear plate 1016 Side wall 1017 Face plate 1018 Fluorescent film 1019 Metal back 1020 Spacer 1020d Plane 1020f, 1025 GND electrode 1030 First support member 1030a Surface 1030b Space 1031 Groove 1032, 1034 Spring shape portion 1033 Second support member 1050, 1051 Insulating layer 1052 First joint member 1053 Second joint member 1054 Weld joint 1055 Third joint member 1060 Spacer assembling device 1061 Substrate table 1062 Spacer clamp unit DX1-Dxm, DY1-D n vessel terminals Hv high voltage terminal Hv vessel terminals Va, Vf applied voltage

Claims (19)

A first substrate having a plurality of electron-emitting devices, which constitutes a vacuum vessel, and a second substrate disposed opposite to the first substrate and irradiated with electrons emitted from the electron-emitting devices; An atmospheric pressure-resistant structure of the vacuum vessel is provided on one of the first substrate and the second substrate, and is sandwiched between the first substrate and the second substrate. At least one spacer having a longitudinal direction substantially perpendicular to a direction in which the first substrate and the second substrate face each other, the first substrate as a hermetically sealed structure of the vacuum vessel, and the second substrate In an image display device having a side wall inside the outer peripheral portion of at least one of the
A first support for supporting the spacer outside an image display area, which is an area between the area of the first substrate on which the electron-emitting devices are provided and the area of the second substrate on which electrons are irradiated; A member is disposed, and a second support member is disposed outside the image display area of one of the first substrate and the second substrate, and the first support member is provided. And an image display device, wherein the second support member and the second support member are joined. 2. The image display device according to claim 1, wherein the first support member and the second support member are made of a conductive member. The image display device according to claim 2, wherein the first support member and the second support member are welded to each other. The image display device according to claim 2, wherein the first support member and the second support member are joined by a first joining member. The image display device according to claim 4, wherein the first joining member is selected from the group consisting of a brazing material, a conductive adhesive, and a low-melting metal material. The image display device according to claim 2, wherein an electrode formed on a surface of the spacer and the first support member are electrically connected. The image display device according to claim 6, wherein the electrode formed on the surface of the spacer and the first support member are electrically connected via a conductive bonding agent. 7. The electrode according to claim 6, wherein the electrode formed on the surface of the spacer and the first support member are electrically connected by contact of a contact portion having a spring characteristic provided on the first support member. 8. The image display device as described in the above. An electrode formed on one of the first substrate and the second substrate on which the second support member is installed and the second support member are electrically connected. The image display device according to claim 2, wherein: An electrode formed on one of the first substrate and the second substrate on which the second support member is installed and the second support member have conductivity. The image display device according to claim 9, wherein the image display device is electrically connected via a bonding agent. An electrode formed on one of the first substrate and the second substrate on which the second support member is installed and the second support member are connected to the second support member by the second support member. The image display device according to claim 9, wherein the image display device is electrically connected by contact of a contact portion having a spring characteristic provided on the support member. An electrode formed on the surface of the spacer and an electrode formed on one of the first substrate and the second substrate on which the second support member is installed are provided. The image display device according to claim 2, wherein the image display device is electrically connected via the first support member and the second support member. An image display device including an airtight container and an image display member and a spacer in the airtight container, wherein the spacer is fixed by welding in the airtight container. . The spacer has a potential regulating electrode for regulating the potential of the surface of the spacer, and the potential of the potential regulating electrode is defined by the welding connection to an electrode provided in the hermetic container. The image display device according to claim 13, wherein: The spacer is a plate-shaped spacer, and both ends in the longitudinal direction of the plate-shaped spacer are fixed outside the image display area in the hermetic container by the welding connection. Item 14. The image display device according to item 13. The spacer has a conductor for defining a potential on the surface of the spacer, and the potential of the conductor is defined by the welding connection to an electrode provided in the hermetic container. The image display device according to claim 15, wherein: 17. The image display device according to claim 16, wherein the welding is performed between a conductive first support member disposed on the spacer and the electrode. 17. The method according to claim 16, wherein the welding is performed between a conductive first support member disposed on the spacer and a second support member disposed on the electrode. Image display device. An image display device comprising an airtight container and an image display member and a spacer in the airtight container, wherein the spacer is fixed in the airtight container via a metal member. Display device.

Images