JP3958262B2 - Image display device and manufacturing method thereof - Google Patents

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.

  An example of an image display device provided with the spacer is an electron beam display device as follows.

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

  A substrate 3111 is fixed to the rear plate 3115, and cold cathode elements 3112 are formed on the substrate 3111 in an N × M matrix. (N and M are positive integers of 2 or more, and are appropriately set according to the target number of display pixels.) Further, the N × M cold cathode elements 3112 have M as shown in FIG. Wiring is performed by two row direction wirings 3113 and N column direction wirings 3114. A portion 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 referred to as a multi-electron beam source. In addition, an insulating layer (not shown) is formed between both the wirings in the row direction wiring 3113 and the column direction wiring 3114 so that electrical insulation is maintained.

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

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

Further, the inside 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 of the hermetic container and the outside. Means for preventing deformation or destruction of 3115 and face plate 3117 is required. In FIG. 20, the spacer 3120 which consists of a comparatively thin glass plate and supports atmospheric pressure is provided. In this way, the space 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 normally maintained at sub millimeters to several millimeters, and the inside of the hermetic container is maintained at a high vacuum as described above. ing.

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

  As many spacers 3120 as are structurally necessary are arranged efficiently. When the spacer 3120 is formed to be shorter 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 connecting member.

  Further, as disclosed in JP-A-9-179508 and JP-A-2000-251796, the spacer 3120 longer than the image area can have an atmospheric pressure-resistant structure only by fixing both ends. At that time, there is a method in which a support member is fixed in advance to both ends of the spacer 3120 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 having a spacer, a plurality of spacers are arranged according to the display area of the display panel and the thickness of the substrate of the rear plate and the face plate. Therefore, as the display area increases or the thickness of the substrate decreases. As the number of spacers increases, the number of spacers also increases. As a result, the man-hours for installing the spacers increase and there is a concern about an increase in manufacturing costs.

  Further, as described above, the work of fixing a plurality of spacers or a plurality of support members to the face plate or the rear plate with a connecting member requires a lot of time as the number of spacers increases, and also in this respect, it is manufactured. There is concern about cost increase.

  Further, in order to make the image display device uniform in image quality, the accuracy of the spacer fixing position needs to be high in micron units. However, there is a concern that distortion due to expansion of the jig for fixing the spacer deteriorates the positional accuracy of the spacer fixing due to the heating process for curing the connection member such as an adhesive used for fixing the spacer.

  In addition, when forming a hermetic container by heat-sealing the rear plate on which the spacer is arranged and the face plate, or when driving the image display device, the face plate or There is a concern that a dimensional difference due to thermal expansion occurs between the rear plate and the spacer is destroyed.

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

  It is another object of the present invention to provide an image display device that is excellent in the positional accuracy to be fixed and in which the influence of the spacer on the display image is extremely reduced.

  Another object of the present invention is to provide an image display device including a spacer whose potential is reliably regulated.

  It is another object of the present invention to provide an image display apparatus that has a very low risk of collapse or destruction of a spacer due to heat during manufacture or driving.

  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 provided with a support member called a spacer inside an airtight container containing an image display member. The

The present invention includes a first substrate having an electron emitting device of the multiple, the first substrate and facing, the first substrate to form a vacuum vessel, the electrons emitted from the electron-emitting devices are irradiated As the atmospheric pressure resistant structure of the second substrate and the vacuum vessel, the first electrodes are respectively provided on the surfaces of both ends of the first substrate and the second substrate which are installed on one of the substrates. plate-like spacer, comprising a picture display device the image display area that is formed between the region where electrons area electron-emitting device of the first substrate is provided and the second substrate is irradiated with In
The first electrode is joined to a conductive first support member provided outside the image display region on one substrate, and is electrically connected to the first support member. The member is welded and joined to a conductive second support member provided outside the image display area on one substrate, and is electrically connected to the second support member. The image display device is electrically connected to a second electrode provided on one of the substrates .

The present invention also provides a first substrate having a plurality of electron-emitting devices, a vacuum container that is disposed opposite to the first substrate, and that is irradiated with electrons emitted from the electron-emitting devices. As the atmospheric pressure resistant structure of the second substrate and the vacuum vessel, the first electrode is provided on the surface of both ends of the first substrate and the second substrate, which are installed on either one of the first substrate and the second substrate. An image display area formed between an area where the electron-emitting device of the first substrate is provided and an area where the electrons of the second substrate are irradiated In the device
The first electrode is joined to a conductive first support member provided outside the image display region on one substrate, and is electrically connected to the first support member. The member is bonded to the second supporting member by electrically connecting the conductive second supporting member provided outside the image display area on the one substrate and the first bonding member . The support member of 2 is electrically connected to a second electrode provided on one substrate, and the first joining member is selected from the group of a brazing material and a low melting point metal material. It is a display device.

Furthermore, it is conceivable that the first electrode and the first support member are electrically bonded via a conductive bonding agent. Alternatively, the first electrode and the first support member, that provided in the first support member, the contact portion having a spring member is electrically connected by contact with the first electrode Conceivable.

Further, a second conductive electrode and the second support member, via a bonding agent having a conductivity that is electrically joined contemplated. Or, the second electrodes and the second support member, provided on the second support member, the contact portion having a spring member is electrically connected by contact with the second electrode It is possible that

According to another aspect of the present invention, there is provided a method for manufacturing an image display device, comprising: bonding first electrodes provided on both ends of a plate-like spacer to a conductive first support member; A first support member connecting step of electrically connecting one electrode to the first support member; and a first substrate provided with a plurality of electron-emitting devices or electrons emitted from the electron-emitting devices are irradiated A second support member connecting step of electrically connecting a second electrode provided on one of the two substrates to the conductive second support member; and electrically connected to the first electrode. The first support member is welded to the second support member electrically connected to the second electrode to weld the spacer to one of the substrates, and the first electrode is connected to the second electrode. A spacer mounting step for electrical connection and an electron-emitting device for the first substrate are provided. One of the image display area is formed between the formed area and the area irradiated with electrons of the second substrate, and the first and second support members are provided outside the image display area. A first substrate having a spacer bonded to the second substrate and a second substrate are arranged to face each other to form a vacuum vessel. In another aspect of the method for manufacturing an image display device of the present invention, the spacer attaching step includes a first support member electrically connected to the first electrode and a first support member electrically connected to the second electrode. The second support member and the first bonding member are used to bond the spacer to one of the substrates and to electrically connect the first electrode to the second electrode. Is selected from the group of brazing filler metals and low melting point metal materials.

  Further, it is conceivable that the electron-emitting devices are arranged in a matrix and are connected to a matrix wiring composed of a plurality of row direction wirings and a plurality of column direction wirings. In this case, the electron-emitting device is considered to be a cold cathode device, and in particular, the cold-cathode device is considered to have a conductive thin film including an electron-emitting portion between electrodes. Further, it is conceivable that the cold cathode device is a surface conduction electron-emitting device.

  Further, it is conceivable that the spacer is disposed on the wiring for driving the electron-emitting device.

  Furthermore, it is conceivable that the second substrate is provided with an image display member that displays an image by being irradiated with electrons emitted from the electron-emitting device. In this case, the image display member may be a fluorescent film including a phosphor that emits light when electrons emitted from the electron-emitting device collide with each other.

  According to the image display device as described above, when a large number of spacers are installed on either the first substrate or the second substrate on which the spacers are installed, the bonding of the spacers is welded or brazed, 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. This can reduce the manufacturing cost of the image display device.

  In addition, when spacer bonding is performed using brazing or a low melting point metal, it becomes possible to easily assemble the spacer, and to improve the yield of the spacer assembling process and to provide a highly reliable image display device. Is possible.

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

  Further, the outer end of the spacer in the first support member in the longitudinal direction is between the spacer joint of the first support member and the second support member, and the spacer of the substrate on which the spacer is installed is installed. There is a gap in a direction perpendicular to the surface, and the first support member acts in the direction of pressing the spacer against the substrate by bringing the outer end of the first support member into contact with the second support member. There is no gap between the spacer and the substrate on which the spacer is installed. As a result, the destruction of the spacer can be prevented and the positional accuracy of the spacer can be improved, and a high-quality image display apparatus can be provided.

  Further, by joining only the outer end portion of the spacer in the longitudinal direction of the first support member to the second support member, it is possible to alleviate the dimensional difference due to thermal expansion between the spacer and the rear plate during panel sealing. Accordingly, it is possible to prevent the destruction of the spacer, improve the yield of the spacer assembling process, and provide a highly reliable image display device.

  In addition, the present invention can provide an image display device including a spacer having a strong and sufficient support function by welding.

  In addition, the present invention can provide an image display device that is excellent in positional accuracy fixed by welding and in which the influence of the spacer on the display image is extremely reduced.

  In addition, the present invention can provide an image display device including a spacer whose potential is reliably regulated by welding.

  Further, according to the present invention, since the spacer is fixed through the metal member, it is possible to provide an image display device that has a very low risk of collapse or destruction of the spacer due to heat during manufacturing or driving.

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

  The present invention can provide an image display device including a spacer having a strong and sufficient support function.

  In addition, the present invention can provide an image display device that is excellent in fixed position accuracy and in which the influence of the spacer on the display image is extremely reduced.

  In addition, the present invention can provide an image display device including a spacer whose potential is reliably defined. In addition, the present invention can provide an image display device that has a very low risk of collapse or destruction of the spacer due to heat during manufacturing or driving.

  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 an image display device of the present invention, in which a part of the panel is cut away to show the internal structure.

  A rear plate 1015 as a first substrate, a side wall 1016 as a frame, and a face plate 1017 as a second substrate form an airtight container (envelope) for maintaining the inside of the display panel in a vacuum. Has been.

Further, since the inside of the hermetic container is maintained at a vacuum of 1.33 × 10 ⁻⁴ [Pa] or less, an atmospheric pressure resistant structure is provided for the purpose of preventing destruction of the hermetic container due to atmospheric pressure or unexpected impact. As shown, a spacer 1020 is provided.

  A substrate 1011 is fixed to the rear plate 1015, and N × M cold cathode 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 desired number of display pixels.) As the cold cathode type electron-emitting device, for example, a surface conduction electron-emitting device or an FE type Or MIM type is preferably applied. A fluorescent film 1018 is formed on the lower surface of the face plate 1017.

  The phosphors of the respective colors are separately applied in a stripe shape, for example, and a black conductive material 1010 is provided between the phosphor stripes (see FIG. 18A). Note that 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 (eg, FIG. 18C).

  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. 1. In a preferred embodiment, the spacer 1020 is formed by forming a high resistance film 11 on the surface of the insulating member 1 for the purpose of preventing electrification, and inside the face plate 1017 (metal back 1019 or the like) and the surface of the substrate 1011 (row). The low resistance film 21 is formed on the contact surface 3 of the spacer 1020 facing the direction wiring 1013 or the column direction wiring 1014) and the side surface portion 5 in contact therewith.

  The thin plate-like spacers 1020 are arranged along the row direction (X direction), and extend from the region sandwiched between the regions formed by the cold cathode elements 1012 and the fluorescent 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 that is installed on the rear plate 1015 in advance.

  Here, the first and second support members 1030 and 1033 are preferably made of a conductive member, a metal or an alloy, such as a stainless material or an alloy mainly composed of Ni and Fe. The performance required for the first support member 1030 includes that the thermal expansion coefficient is close to that of the spacer 1020 and the member constituting 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. 3B. Is a cross-sectional view thereof. In the image display area of the rear plate 1015, the row direction wiring 1013 and the column direction wiring 1014 for driving the electron source that emits electrons, and the insulation for electrically insulating the row direction wiring 1013 and the column direction wiring 1014 are provided. A layer 1050 is formed. Further, outside the image display region in the longitudinal direction (X direction) of the row direction wiring 1013 of the rear plate 1015, the row direction wiring 1013 and the insulating layer 1051, and a potential regulating electrode whose potential is regulated to a constant potential are formed. Has been. Here, the potential regulating electrode is preferably a ground (GND) electrode 1025. A second support member 1033 is fixed on the GND electrode 1025 by a third bonding member 1055. Here, when a conductive bonding member is used as the third bonding member 1055 and a conductive member or a metal or alloy is used as the second supporting member 1033 as described above, the GND electrode 1025 and the second supporting member are used. 1033 is electrically connected. As described above, the electrical connection may be achieved by making the third bonding member 1055 used when fixing the second support member 1033 to the rear plate 1015 have conductivity, A part of the second support member 1033 may be formed into 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. Note that the second support member 1033 may be formed outside the image display area of the face plate 1017 when the potential regulating electrode is formed on 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 viewed from the Y direction, and FIG. 5B is a side view 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 region. The potential regulating electrode is preferably regulated to the ground potential. In addition, the spacer 1020 and the first support member 1030 are fixed using the second bonding member 1053. At this time, the conductive member, metal, or alloy is used as the first support member 1030 and the conductive joint member is used as the second joint member 1053, whereby the potential of the GND electrode 1020f is set to the first support member 1030. In addition, as described above, the second support member 1033 and the third bonding member 1055 are also made conductive, so that the potential of the GND electrode 1020f can be set to the above-described potential defining electrode. It can be defined 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 facing the spacer installation surface of the rear plate 1015 of the spacer 1020 and a surface 1030a facing the spacer installation surface of the rear plate 1015 of the first support member 1030. . Similarly to the second support member 1033, the first support member 1030 is made of an alloy having, for example, Ni or Fe as its main component and having a thermal expansion coefficient very close to that of the rear plate.

  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 the spacer assembling apparatus (not shown) on the center of the row direction 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. The At this time, the first support member 1030 joined to the both ends of the spacer 1020 in advance by the second joining member 1053 is placed on the second support member 1033 disposed on the rear plate 1015 with a predetermined amount. Arranged through space. Thus, both the first support member 1030 and the second support member 1033 are disposed outside the image display area.

  Further, as shown in FIG. 7, the first support member 1030 is curved by pushing the opposite side of the spacer joint portion of the first support member 1030 in the −Z direction, so that the spacer of the first support member 1030 Only the outer end portion in the longitudinal direction 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 together at the welded joint 1054. As a result, the spacer 1020 can be reliably disposed at a predetermined position on the rear plate 1015 in a short time and without a gap between the rear plate 1015 and the spacer 1020.

  Further, 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.

  Further, examples of the first bonding member 1052 include low melting point metals such as solder and indium, vacuum noble metal brazing specified in JIS, and conductive inorganic adhesives. Note that the performance required for the first bonding member 1052 includes generation of unnecessary gas in vacuum.

Next, an example of a procedure for creating an image display device will be described with reference to FIGS. 9 (a) to 9 (e).
(1) First, as shown in FIG. 9A, outside the image display region 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 is formed, and a second support member 1033 is fixed on the GND electrode 1025 by a third bonding member 1055. At this time, the GND electrode 1025 and the second support member 1033 are electrically connected. The electrical connection may be achieved by providing conductivity to the third bonding member 1055 used when the second support member 1033 is fixed to the rear plate 1015, or the second support member. It may be possible to make a part of 1033 into a leaf spring shape and directly contact with the GND electrode 1025 of the rear plate 1015.
(2) Next, as shown in FIG. 9B, support members 1030 are fixed to both ends of the spacer 1020 by the third bonding member 1055. A space is provided between a flat surface 1020 d including a surface of the spacer 1020 facing the spacer installation surface of the rear plate 1015 and a surface 1030 a of the support member 1030 facing the spacer installation surface of the rear plate 1015. The size of this space is preferably slightly larger than the thickness of the second support member 1033 disposed on the rear plate 1015. In addition, a GND electrode 1020f is formed on both ends of the spacer 1020, and the GND electrode 1020f and the first support member 1030 are in direct contact with each other or are electrically bonded via the second bonding member 1053. Has been.
(3) Next, as shown in FIG. 9C, a process of aligning the spacer 1020 and the support member 1030 at a predetermined position of the rear plate 1015 using the spacer assembling apparatus 1060 will be described. The spacer assembling apparatus 1060 includes a substrate table 1061 that supports the rear plate 1015 and a spacer clamp unit 1062 that clamps 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 °. The angle is adjusted within ± 0.1 degrees. The spacer clamp unit 1062 is clamped in the vicinity of the fixing portion of the support member 1030 of the spacer 1020, and the spacer 1020 is aligned with a predetermined position of the rear plate 1015 supported on the substrate table 1061.
(4) Next, as shown in FIG. 9 (d), the first support member 1030 is curved by pushing the opposite side of the spacer joint portion of the first support member 1030 in the -Z direction and bending the first support member 1030. Only the outer end in the longitudinal direction 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 together at the welded joint 1054. Thereby, the spacer 1020 is bonded and fixed at a predetermined position on the rear plate 1015. 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 clamps at substantially both ends of the spacer 1020.
(5) Next, panel sealing of the face plate 1017 and the rear plate 1015 will be described with reference to FIG. The panel sealing is performed by arranging 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 substantially 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. 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, frit glass is applied to a position where the rear plate 1015 and the side wall 1016 of the face plate 1017 abut, and until the surface of the rear plate 1015 and the side wall 1016 of the face plate 1017 abuts about 400 ° C. The face plate 1017 and the rear plate 1015 are heated from the 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, both are pressurized and then cooled. Thereafter, the sealed space surrounded by the face plate 1017, the rear plate 1015, and the side wall 1016 is evacuated.

  As described above, the metal first support members 1030 are fixed in advance to both ends of the spacer 1020 longer than the image area, and further, the metal first support member 1030 is placed 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 joining member 1052 having conductivity such as welding joining 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 of the rear plate 1015 are connected to each other by welding joining or brazing material. By bonding using one bonding member 1052, the spacer 1020 can be disposed on the rear plate 1015 in a short time. This can reduce the manufacturing cost of the image display device.

  Further, when the first and second support members 1030 and 1033 are joined by the 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 and the manufacturing cost can be reduced. Is possible.

  In addition, since the spacer 1020 can be joined by welding, brazing, or a low melting point metal, the amount of heat applied during the joining of the spacer 1020 can be greatly reduced, and distortion of the spacer assembling apparatus can be eliminated to improve the positional accuracy of the spacer 1020. Can be planned. Thereby, it is possible to provide a high-quality image display device.

  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 the first and first The second support members 1030 and 1033 are welded at the weld joint 1054 or joined by the first joint member 1052 having conductivity, so that the spacer 1020 is mechanically joined, the GND electrode 1020f of the spacer 1020 and the rear plate 1015 are joined. The GND electrodes 1025 can be electrically joined at the same time. Thereby, the spacer assembling process can be simplified, and the manufacturing cost can be reduced.

  Further, the outer end portion of the first support member 1030 in the longitudinal direction of the spacer 1020 is between the spacer joint portion of the first support member 1030 and the second support member 1033, and on the installation surface of the spacer 1020. The first support member 1030 presses the spacer 1020 against the rear plate 1015 by having a gap in the orthogonal direction and bringing the outer end of the first support member 1030 into contact with the second support member 1033. Acting in the direction, there is no gap between the spacer 1020 and the rear plate 1015. As a result, it is possible to prevent the spacer 1020 from being destroyed during panel sealing, improve the positional accuracy of the spacer 1020, and provide a high-quality image display device.

  Further, since the heating at the time of panel sealing is performed by a planar heater, a heater lamp, or the like from the surface opposite to the surface in contact with the sealed space of the rear plate 1015 and the face plate 1017, As the temperature of the rear plate 1015 increases, a dimensional difference due to thermal expansion occurs between the spacer 1020 and the rear plate 1015, and there is a problem that the spacer 1020 is pulled and broken in the longitudinal direction. With respect to this, the first support member 1030 joined to the spacer 1020 is made of a metal material having good thermal conductivity so that the heat of the rear plate 1015 can be easily received, 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 longitudinal direction of the spacer 1020, and A dimensional difference due to thermal expansion could be compensated between the rear plates 1015. In this way, by preventing the spacer 1020 from being destroyed, it is possible to improve the yield of the assembly process of the spacer 1020 and provide a highly reliable image display device.

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

  First, as shown in FIG. 1, the row direction wiring 1013, the column direction wiring 1014, the interelectrode insulating layer (not shown), and the element electrodes of the surface conduction electron-emitting device 1012 and the conductive thin film were formed on the 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 shape having a cross section of 2 mm × 0.2 mm by a heat stretching method, and was cut as necessary.

  Of the surface of the spacer 1020, high resistance films described later are formed on four surfaces (300 × 2, 300 × 0.2 front and back surfaces) in the image display region of the hermetic container, and the face plate 1017 and the rear plate 1015 are formed. 2 surfaces (2 surfaces of 280 × 0.2) that are in contact with the image display region, and a region (280 × 0) from the side that contacts the face plate 1017 and rear plate 1015 of the 280 × 2 surface to a height of 0.1 mm. 1) A conductive film was formed. In addition, conductive films were also formed on the 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.

  As the high resistance film, a Cr—Al alloy nitride film (200 nm thickness, approximately 109 [Ω / □]) formed by simultaneously sputtering a Cr and Al target with a high frequency power source was used. The conductive film provided in the image region has an electric field around the spacer 1020 in addition to the purpose of ensuring electrical connection between the high resistance film formed on the spacer 1020 and the face plate 1017, and the high resistance film and the rear plate 1015. The purpose is to suppress and control the trajectory of the electron beam from the electron-emitting device. In addition, the conductive film provided outside the image area is electrically bonded to the GND electrode 1025 provided outside the image area of the rear plate 1015 as the GND electrode 1020f.

  As the material of the first support member 1033, an alloy having, for example, Ni or Fe as a main component, which is very close in thermal expansion coefficient to the rear plate 1015 is used. As shown in FIG. 10, the shape of the first support member 1030 is 5 × 3 mm (length and 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.

  As the material of the second support member 1033, an alloy having, for example, Ni or Fe as its main component, which is very close in thermal expansion coefficient to the rear plate 1015, is used. 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 contact with the spacer 1020 in the image display area of the rear plate 1015 and the portion of the substrate to which 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 have substantially the same dimension. Further, a GND electrode 1025 is formed at a portion where the second support member 1033 is fixed.

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

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

  Spot welding was used as a welding method for the first and second support members 1030 and 1033. As another welding method, laser welding can be considered. Since these welding methods are performed by local heating, the spacer 1020 and the rear plate 1015 are not thermally affected.

  As shown in FIGS. 4 and 5, a groove (width 0.25 mm, length 1.5 mm) provided in the central portion of the first support member 1030 is inserted into both ends of the spacer 1020, and the second bonding member 1053 is inserted. To fix. At that time, the GND electrode 1020f of the spacer 1020 and the first support member 1030 are electrically joined via the second joining member 1053.

  Further, the plate 1020d of the second support member 1033 is provided on the plane 1020d including the surface facing the spacer installation surface of the rear plate 1015 and the surface 1030a of the first support member 1030 facing the spacer installation surface. A space is provided with approximately the same dimensions as the thickness.

  As shown in FIGS. 2 and 3, the second support member 1033 is insulatively provided on the GND electrode 1025 outside the image display area on the extension of the row direction wiring with which the spacer 1020 in the image display area of the rear plate 1015 contacts. The frit glass was used for bonding. The points to be noted when joining are that a leaf spring shape portion 1034 as 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 connected. .

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

  The spacer 1020 is brought into contact with the center of the row-direction wiring 1013 in the image display area of the rear plate 1015 so as to be substantially vertical by the spacer assembling apparatus, and then the opposite side of the spacer joint portion of the first support member 1030 is placed. The second support member 1033 in which only the outer end in the longitudinal direction of the spacer 1020 of the first support member 1030 is disposed on the rear plate 1015 by curving the first support member 1030 pushed in the −Z direction. Abut. At this time, the first support member acts in a direction in which the spacer 1020 is pressed against the rear plate 1015, so that 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 weld joint 1054. Thereby, the spacer 1020 is bonded 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 joined.

  After that, as shown in FIG. 1, the side wall 1016 was placed on the rear plate 1015 via the frit glass, and the frit glass was also applied to the side wall 1016 where the face plate 1017 should come into contact. The face plate 1017 is provided with a fluorescent film 1018 made of each color phosphor in a stripe shape extending in the column wiring (Y direction) and a metal back 1019 on the inner surface.

  The plane of the face plate 1017 and the plane of the rear plate 1015 are made parallel and close to each other, 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 airtight container completed as described above is exhausted 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 container external terminals DX1 to Dxm and DY1 to DYn. A 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 previous embodiment.

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

  Finally, a getter process was performed to maintain the degree of vacuum after sealing.

  In the image display device, the display panel completed as described above and shown in FIG. 1 is connected to each cold cathode element (surface conduction electron-emitting element) 1012 through external terminals DX1 to Dxm and DY1 to DYn. Electrons are emitted by applying a scanning signal and a modulation signal by signal generation means (not shown), respectively, and a high voltage is applied to the metal back 1019 through a high voltage terminal Hv to accelerate the emitted electron beam, and the fluorescent film 1018. An image was displayed by causing electrons to collide with each other and exciting and emitting each color phosphor. 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 light-emission spot array is formed in two dimensions including a light-emission spot due to emitted electrons from the cold cathode element 1012 located close to the spacer 1020, and a clear color image display with good color reproducibility can be achieved. It was.
(Second embodiment)
Another assembly example of the above embodiment will be described with reference to FIGS.

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

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

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

  As shown in FIG. 13, a spring-shaped portion 1034 is provided on the outside of □ 3 mm (length and 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 first support member 1030.

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

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

  For the second bonding member 1053, an inorganic adhesive having alumina as a base material was used. The second bonding member 1053 is insulative.

  For the second bonding member 1053, an inorganic adhesive having alumina as a base material was used. The second bonding member 1053 is insulative.

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

  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 bonding member 1053. At that time, the spring-shaped portion 1032 which is the 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 the two are electrically connected. Further, the plane 1020d including the surface facing the spacer installation surface of the rear plate 1015 and the surface 1030a of the first support member 1030 facing the spacer installation surface of the rear plate 1015 are based on the thickness of the second support member 1033. There is a little space.

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

  A second support member 1033 was joined to the GND electrode 1025 outside the image display area on the extension of the row direction wiring with which the spacer 1020 in the image display area of the rear plate 1015 is in contact 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 direction wiring 1013 in the image display area of the rear plate 1015 so as to be substantially vertical by the spacer assembling apparatus. As shown in FIG. 16, in this state, the outer end of the spacer 1020 in the longitudinal direction of the first support member 1030 and the second support member 1033 are joined by the first joining member 1052. Thereby, the spacer 1020 is bonded and fixed at a predetermined position on the rear plate 1015.

  Also, 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.

  As other shapes of the first support member 1030, a Y shape can be considered as shown in FIG. In this case, the spacer 1020 is put in 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.

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

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

  The spacer 1020 abuts on the center of the row direction 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 of the spacer 1020 in the longitudinal direction of the first support member 1030 and the second support member 1033 are joined by welding or the first joining member 1052. Thereby, the spacer 1020 is bonded and fixed at a predetermined position on the rear plate 1015. Also, by this bonding, the GND electrode 1020f of the spacer 1020 and the GND electrode 1025 of the rear plate 1015 are electrically bonded.

  Other configurations and processes are the same as those in the first embodiment.

It is the perspective view which notched and showed a part of display panel of the image display apparatus which can apply this invention. It is a figure explaining the rear plate of FIG. 1, (a) is a top view, (b) is sectional drawing. It is a figure explaining the rear plate of FIG. 1, and a 2nd supporting member, (a) is a top view, (b) is sectional drawing. It is a side view of the X direction explaining the spacer of FIG. It is a side view explaining the spacer and 1st supporting member of FIG. 1, (a) is a side view of a Y direction, (b) is a side view of the X direction of FIG. It is sectional drawing which shows the positional relationship of the rear plate of FIG. 1, a spacer, and a 1st, 2nd supporting member. It is sectional drawing which shows the positional relationship of the rear plate of FIG. 1, a spacer, and a 1st, 2nd supporting member. It is sectional drawing which shows the other positional relationship of the rear plate of FIG. 1, a spacer, and a 1st, 2nd supporting member. It is a figure explaining the panel assembly process of FIG. It is a figure explaining the 1st supporting member of FIG. It is a figure explaining the other shape of the 1st supporting member of FIG. It is a figure explaining the 2nd supporting member of FIG. It is a figure explaining the other shape of the 2nd supporting member of FIG. It is a sectional side view explaining the other shape of the spacer of FIG. 1, and a 1st supporting member, (a) is a X direction, (b) is a side view of a Y direction. It is a figure which shows the other positional relationship of the rear plate of FIG. 1, and a 2nd supporting member, (a) is a top view, (b) is sectional drawing. It is sectional drawing which shows the other positional relationship of the rear plate of FIG. 1, a spacer, and a 1st, 2nd supporting member. It is a perspective view which shows the other positional relationship of the rear plate of FIG. 1, a spacer, and a 1st, 2nd supporting member. FIG. 2 is a plan view illustrating a phosphor arrangement of a face plate of the display panel shown in FIG. 1. It is a cross-sectional schematic diagram along AA of FIG. It is the perspective view which notched and showed a part of display panel of the conventional image display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulating member 3 Contact surface 5 Side 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 shaped portion 1033 Second support member 1050, 1051 Insulating layer 1052 First joining member 1053 Second joining member 1054 Welded joint 1055 Third joint member 1060 Spacer assembling apparatus 1061 Substrate table 1062 Spacer clamp unit DX1 to Dxm, DY1 to DYn Container outer terminal Hv High Pressure terminal Hv Container outer terminal Va, Vf Applied voltage

Claims (13)

A first substrate having a plurality of electron-emitting devices, and a first container that is disposed opposite to the first substrate, forms a vacuum container together with the first substrate, and is irradiated with electrons emitted from the electron-emitting devices. and the second substrate, as atmospheric pressure resistant structure of the vacuum vessel, the first installed in the substrate and one of the substrates of said second substrate, each first electrode on the surface of both ends and a plate-like spacer having, in the image display region is formed between the region in which the first of said electron-emitting device region and the second substrate provided electrons of the substrate is irradiated In the image display device
The first electrode is joined to a conductive first support member provided outside the image display region on the one substrate, and is electrically connected to the first support member. The first support member is welded and joined to a conductive second support member provided outside the image display area on the one substrate, and is electrically connected to the second support member. The image display apparatus, wherein the second support member is electrically connected to a second electrode provided on the one substrate. A first substrate having a plurality of electron-emitting devices, and a first container that is disposed opposite to the first substrate, forms a vacuum container together with the first substrate, and is irradiated with electrons emitted from the electron-emitting devices. As the atmospheric pressure-resistant structure of the two substrates and the vacuum vessel, the first electrodes are disposed on the surfaces of both ends of the first substrate and the second substrate, respectively. And an image display region is formed between the region of the first substrate where the electron-emitting device is provided and the region of the second substrate irradiated with electrons. In the image display device
The first electrode is joined to a conductive first support member provided outside the image display region on the one substrate, and is electrically connected to the first support member. The first support member is bonded to the conductive second support member provided outside the image display area on the one substrate by the first bonding member, and the second support member The second support member is electrically connected to a second electrode provided on the one substrate, and the first joining member is made of a brazing material and a low melting point metal material. An image display device selected from the group . Wherein the first electrode and the first support member and is electrically connected via a bonding agent having conductivity, an image display apparatus according to claim 1 or 2. The first electrode and the first support member are electrically joined to each other when a contact portion having a spring member provided on the first support member is in contact with the first electrode. The image display device according to claim 1 or 2 . Wherein the second electrode and the second support member, via a bonding agent having conductivity is electrically connected, the image display apparatus according to any one of claims 1 to 4. The second electrode and the second support member are electrically joined to each other when a contact portion having a spring member provided on the second support member is in contact with the second electrode. The image display device according to any one of claims 1 to 4 . Wherein the first electrode and the second electrode, the first support member and are electrically connected via the second supporting member, the first term any of claims 1 to 6 The image display device described. A first electrode provided on each surface of both ends of the plate-like spacer is joined to a conductive first support member, and the first electrode is electrically connected to the first support member. 1 supporting member connecting step;
  A second electrode provided on one substrate of a first substrate including a plurality of electron-emitting devices or a second substrate irradiated with electrons emitted from the electron-emitting devices is provided with a conductive second A second support member connecting step of electrically connecting the support member;
  The spacer is attached to the one substrate by welding the first support member electrically connected to the first electrode to the second support member electrically connected to the second electrode. And a spacer mounting step for electrically connecting the first electrode to the second electrode;
  An image display region is formed between a region of the first substrate where the electron-emitting device is provided and a region of the second substrate irradiated with electrons, and the first and second support members are A step of disposing the first substrate and the second substrate with the spacers bonded to either one so as to be provided outside the image display region and constituting a vacuum vessel;
  A method for manufacturing an image display device. A first electrode provided on each surface of both ends of the plate-like spacer is joined to a conductive first support member, and the first electrode is electrically connected to the first support member. 1 supporting member connecting step;
  A second electrode provided on one substrate of a first substrate including a plurality of electron-emitting devices or a second substrate irradiated with electrons emitted from the electron-emitting devices is provided with a conductive second A second support member connecting step of electrically connecting the support member;
  The spacer is formed by joining the first support member electrically connected to the first electrode with the second support member electrically connected to the second electrode by the first joining member. A spacer attaching step of joining the first electrode to the second electrode and electrically connecting the first electrode to the second electrode;
  An image display region is formed between a region of the first substrate where the electron-emitting device is provided and a region of the second substrate irradiated with electrons, and the first and second support members are A step of disposing the first substrate and the second substrate with the spacers bonded to either one so as to be provided outside the image display region and constituting a vacuum vessel;
  Have
  The method for manufacturing an image display device, wherein the first joining member is selected from the group of a brazing material and a low melting point metal material. The first support member connecting step includes electrically bonding the first electrode and the first support member via a conductive bonding agent. Manufacturing method of image display apparatus. In the first support member connecting step, the first electrode and the first support member are brought into contact with a contact portion having a spring member provided on the first support member. The manufacturing method of the image display apparatus of Claim 8 or 9 including electrically joining by this. The said 2nd supporting member connection process includes electrically bonding the said 2nd electrode and the said 2nd supporting member through the bonding agent which has electroconductivity. The image display device according to item 1. In the second support member connecting step, the second electrode and the second support member are brought into contact with a contact portion having a spring member provided on the second support member. The manufacturing method of the image display apparatus of any one of Claim 8 to 11 including electrically joining by this.

Images