WO2005076310A1 - 画像表示装置 - Google Patents
画像表示装置 Download PDFInfo
- Publication number
- WO2005076310A1 WO2005076310A1 PCT/JP2005/001360 JP2005001360W WO2005076310A1 WO 2005076310 A1 WO2005076310 A1 WO 2005076310A1 JP 2005001360 W JP2005001360 W JP 2005001360W WO 2005076310 A1 WO2005076310 A1 WO 2005076310A1
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- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- spacer
- electron beam
- support substrate
- image display
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/864—Spacers between faceplate and backplate of flat panel cathode ray tubes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/30—Cold cathodes, e.g. field-emissive cathode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/123—Flat display tubes
- H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
- H01J31/127—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using large area or array sources, i.e. essentially a source for each pixel group
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/86—Vessels
- H01J2329/8625—Spacing members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/86—Vessels
- H01J2329/8625—Spacing members
- H01J2329/863—Spacing members characterised by the form or structure
Definitions
- the present invention relates to an image display device including a substrate disposed to face and a spacer structure disposed between the substrates.
- CTRs cathode ray tubes
- SEDs surface conduction electron-emitting devices
- FED field emission device
- the SED includes a first substrate and a second substrate that are opposed to each other at a predetermined interval, and these substrates are joined to each other via rectangular side walls to form a vacuum envelope. Is composed. On the inner surface of the first substrate, phosphor layers of three colors are formed, and on the inner surface of the second substrate, a large number of electron emitting elements corresponding to each pixel are arranged as electron emitting sources for exciting the phosphor. I have.
- Each electron-emitting device includes an electron-emitting portion, a pair of electrodes for applying a voltage to the electron-emitting portion, and the like.
- the space between the first substrate and the second substrate that is, the inside of the vacuum envelope is maintained at a high degree of vacuum.
- the degree of vacuum is low, the life of the electron-emitting device and, consequently, the life of the device are reduced.
- atmospheric pressure acts on the first substrate and the second substrate. Therefore, in order to support an atmospheric load acting on these substrates and maintain a gap between the substrates, a number of plate-like or columnar spacers are arranged between the two substrates.
- the spacers are directly located between the phosphors or between the electron-emitting devices.
- a large number of spacers are formed with high precision on a metal plate in which electron beam passage holes through which electrons pass are formed in advance, and the spacers formed on this metal plate are removed.
- a method of aligning with the first substrate or the second substrate is conceivable.
- the spacer-forming material and the adhesive component that have oozed out onto the metal plate have irregular oozing shapes and are likely to be a source of discharge.
- the bleeding portion of the spacer forming material is charged, the emitted electron beam is attracted to the bleeding portion and deviates from the original orbit.
- mislanding of the electron beam occurs with respect to the phosphor layer and the color purity of the displayed image is degraded.
- Japanese Patent Application Laid-Open No. 2001-229824 discloses a method of manufacturing a vacuum envelope of an image display device, in which a first substrate, a second substrate, and a spacer structure are previously set in a vacuum and sealed. Vacuum degree after wearing For the purpose of holding, a manufacturing method has been proposed in which a getter is applied on the metal back layer of the first substrate, and then the first substrate and the second substrate are sealed so as to hold the spacer structure.
- a high voltage of, for example, 10 KV is applied between the first substrate and the second substrate as an acceleration voltage of the electron beam. If a getter is provided on the metal back layer under a high voltage, the current discharge is likely to occur between the metal back layer and the first substrate. When a discharge occurs, the phosphor layer, the metal back layer, the electron-emitting device on the second substrate, and the like may be broken.
- the spacer and the electron beam passage hole with respect to the first substrate and the second substrate is an important issue.
- the electron beam passage holes and spacers formed in the support substrate must be provided so as not to block the emitted electrons.
- the existing manufacturing method requires an increase in the size of the spacer structure. Can be difficult. Alternatively, it is expected that the member manufacturing cost will be high.
- the coordinate accuracy of the formation position of the electron beam passage hole deteriorates as the size of the support substrate increases.
- the present invention has been made in view of the above points, and an object of the present invention is to provide an image display device which suppresses an image defect due to bleeding of a spacer forming material and has improved display quality.
- Another object of the present invention is to provide an image display device which suppresses generation of electric discharge and has improved atmospheric pressure resistance.
- Still another object of the present invention is to provide an image display device which can be made large in size and high in definition.
- an image display device includes a first substrate on which a phosphor screen is formed, a first substrate facing the first substrate with a gap provided therebetween, and A second substrate provided with a plurality of electron emission sources for exciting a surface; and a spacer structure provided between the first and second substrates and supporting an atmospheric pressure load acting on the first and second substrates.
- An image display device includes a first substrate having a phosphor screen including a phosphor layer and a metal back layer provided so as to overlap the phosphor screen; A second substrate on which a plurality of electron emission sources for emitting electrons toward the phosphor screen are disposed, and the second substrate is disposed between the first and second substrates; It has a first surface in contact with the first substrate, a second surface facing the second substrate, and a plurality of electron beam passage holes facing the electron emission source, and is covered with an insulating material.
- a supporting substrate and a plurality of spacers erected between the second surface of the supporting substrate and the second substrate and supporting the atmospheric pressure acting on the first and second substrates,
- Each of the supporting substrates is in contact with the spacer, and is elastic in a height direction of the spacer. It has a plurality of deformable height relief portions!
- An image display device provides a phosphor screen including a phosphor layer, A first substrate having a metal back layer provided on the surface and a getter film formed on the metal back layer; and A second substrate on which a plurality of electron emission sources for emitting electrons toward a surface are disposed; and a first surface disposed between the first and second substrates and in contact with the first substrate; A second surface facing the two substrates, a plurality of electron beam passage holes facing the electron emission source, and a plurality of recesses formed in the first surface; A coated support substrate, and a plurality of spacers erected between the second surface of the support substrate and the second substrate and supporting an atmospheric pressure acting on the first and second substrates, It has.
- An image display device includes a first substrate on which a fluorescent screen is formed, and a plurality of substrates that are disposed to face each other with a gap between the first substrate and that excite the fluorescent screen.
- a second substrate provided with an electron emission source, and a plurality of spacer assemblies each provided between the first and second substrates and supporting an atmospheric pressure load acting on the first and second substrates.
- each of the spacer structures faces the first and second substrates, and has a plate-like support substrate having a plurality of electron beam passage holes facing the electron emission sources, respectively. And a plurality of spacers erected on the surface of the support substrate.
- FIG. 1 is a perspective view showing an SED according to a first embodiment of the present invention.
- FIG. 2 is a perspective view of the SED, taken along a line II II in FIG. 1.
- FIG. 3 is an enlarged sectional view showing the SED.
- FIG. 4 is an enlarged perspective view showing a part of a spacer structure of the SED.
- FIG. 5 is a cross-sectional view showing a support substrate and a mold used for manufacturing the spacer structure.
- FIG. 6 is a cross-sectional view showing an assembly in which the molding die and a support substrate are brought into close contact with each other.
- FIG. 7 is a cross-sectional view showing a state where the mold is opened.
- FIG. 8 is a perspective view showing a spacer structure of an SED according to a second embodiment of the present invention.
- FIG. 9 is a sectional view showing an SED according to a third embodiment of the present invention.
- FIG. 10 is a perspective view showing an SED according to a fourth embodiment of the present invention.
- FIG. 11 is a perspective view of the SED taken along a line XI—XI in FIG.
- FIG. 12 is an enlarged sectional view showing the SED.
- FIG. 13 is a plan view showing a support substrate of a spacer structure in the SED.
- FIG. 14 is a cross-sectional view showing a part of the SED in an enlarged manner.
- FIG. 15 is a plan view showing a support substrate of an SED according to another embodiment of the present invention.
- FIG. 16 is a perspective view showing an SED according to a fifth embodiment of the present invention.
- FIG. 17 is a perspective view of the SED, taken along a line XVII-XVII in FIG. 16;
- FIG. 18 is an enlarged sectional view showing the SED.
- FIG. 19 is a perspective view showing a second substrate and a plurality of spacer structures of the SED.
- FIG. 20 is a perspective view showing a second substrate and a plurality of sensor assemblies of an SED according to a sixth embodiment of the present invention.
- FIG. 21 is a perspective view showing a second substrate and a plurality of sensor assemblies of an SED according to a seventh embodiment of the present invention.
- FIG. 22 is a sectional view showing an SED according to an eighth embodiment of the present invention.
- FIG. 23 is a perspective view showing a partly broken SED according to a ninth embodiment of the present invention.
- FIG. 24 is a cross-sectional view of the SED.
- FIG. 25 is a perspective view showing a spacer structure of the SED.
- the SED includes a first substrate 10 and a second substrate 12 each formed of a rectangular glass plate, and these substrates are spaced apart by about 1.0-2. Opposed.
- the first substrate 10 and the second substrate 12 are joined to each other via a rectangular frame-shaped side wall 14 made of glass to form a flat vacuum envelope 15 whose inside is maintained in a vacuum. .
- a phosphor screen 16 functioning as a phosphor screen is formed.
- the phosphor screen 16 is configured by arranging phosphor layers R, G, and B that emit red, blue, and green light, and the light-shielding layer 11, and these phosphor layers are formed in a stripe shape, a dot shape, or a rectangular shape. ing.
- a metal back 17 And a getter film 19 are formed in this order.
- a large number of surface conduction electron-emitting devices 18 each emitting an electron beam are provided as an electron emission source for exciting the phosphor layers R, G, and B of the phosphor screen 16. Is provided. These electron-emitting devices 18 are arranged in a plurality of columns and a plurality of rows corresponding to each pixel. Each of the electron-emitting devices 18 includes an electron-emitting portion (not shown), a pair of device electrodes for applying a voltage to the electron-emitting portion, and the like.
- a large number of wirings 21 for supplying a potential to the electron-emitting device 18 are provided in a matrix, and the ends of the wirings 21 are projected outside the vacuum envelope 15 by bowing. You.
- the side wall 14 functioning as a joining member is sealed to the peripheral portion of the first substrate 10 and the peripheral portion of the second substrate 12 by a sealing material 20 such as a low melting point glass or a low melting point metal. Substrates are joined together.
- the SED includes a spacer structure 22 provided between the first substrate 10 and the second substrate 12.
- the spacer structure 22 is formed on a support substrate 24 made of a rectangular metal plate disposed between the first and second substrates 10 and 12, and is integrally erected on both surfaces of the support substrate. And a large number of pillar-shaped spacers.
- the support substrate 24 has a first surface 24a facing the inner surface of the first substrate 10 and a second surface 24b facing the inner surface of the second substrate 12, and supports these substrates. They are arranged in parallel.
- a large number of electron beam passage holes 26 are formed in the support substrate 24 by etching or the like.
- the electron beam passage holes 26 are arranged at a first pitch via a bridge 27 in a first direction X parallel to the longitudinal direction of the vacuum envelope 15 and in a second direction Y orthogonal to the first direction. They are provided side by side at a second pitch larger than the first pitch.
- the electron beam passage holes 26 are arranged to face the electron-emitting devices 18, respectively, and transmit the electron beams emitted from the electron-emitting devices.
- the support substrate 24 is formed of, for example, an iron-nickel-based metal plate with a thickness of 0.1 to 0.3 mm. On the surface of the support substrate 24, an oxide film made of an element constituting the metal plate, for example, an oxide film having a FeO, NiFeO force is formed. Surface 24a, 24b of support substrate 24
- each electron beam passage hole 26 is covered with a high resistance film having a discharge current limiting effect.
- This high-resistance film is formed of a high-resistance material mainly composed of glass. It is.
- first spacers 30a are erected, and are respectively located between the electron beam passage holes 26 arranged in the second direction Y. .
- the tip of the first spacer 30a is in contact with the inner surface of the first substrate 10 via the getter film 19, the metal back 17, and the light shielding layer 11 of the phosphor screen 16.
- a plurality of second spacers 30b are erected in a standing manner, and are respectively located between the electron beam passage holes 26 arranged in the second direction Y. .
- the tip of the second spacer 30b is in contact with the inner surface of the second substrate 12.
- the tip of each second spacer 30 b is located on the wiring 21 provided on the inner surface of the second substrate 12.
- the first and second spacers 30a and 30b are located in alignment with each other, and are formed integrally with the support substrate 24 with the support substrate 24 sandwiched from both sides.
- Each of the first and second spacers 30a and 30b is formed in a tapered shape in which the diameter of the support substrate 24 side is reduced toward the extending end.
- each of the first spacers 30a has a substantially elliptical cross-sectional shape, the diameter of the base end located on the support substrate 24 side is about 0.3 mm X 2 mm, and the diameter of the extension end is about 0.3 mm. It is formed to be 2mm X 2mm and about 0.6mm in height.
- Each of the second spacers 30b has a substantially elliptical cross-sectional shape, and has a diameter of about 0.3 mm X 2 mm at a base end located on the support substrate 24 side and a diameter of about 0.2 mm X 2 mm at an extension end. , And the height is about 0.8 mm.
- each electron beam passage hole 26 is formed in a rectangular shape. Except for the electron beam passage holes 26 near the spacer standing position, each of the other electron beam passage holes 26 has a dimension in the first direction X of 0.2 mm and a dimension L1 in the second direction of 0.2 mm. ing.
- the electron beam passage hole 26a near the spacer standing position has a dimension in the first direction X of 0.2 mm, a dimension L2 in the second direction of 0.25 mm, and has another dimension. It has an area larger than the electron beam passage hole 26.
- the electron beam passage holes 26a near the spacer standing position indicate the electron beam passage holes facing the first and second spacers 30a and 30b, and in the present embodiment, each of the spacers is used.
- the area of the three electron beam passage holes 26a located on the side is formed to be larger than the other electron beam passage holes.
- the number of the electron beam passage holes 26a having such a large area is not limited to three, and may be four or more on one side of the spacer as necessary. It may be above.
- the spacer structure 22 configured as described above is provided between the first substrate 10 and the second substrate 12.
- the first and second spacers 30a and 30b contact the inner surfaces of the first substrate 10 and the second substrate 12 to support an atmospheric pressure load acting on these substrates and to set a predetermined distance between the substrates. Maintain to
- the SED includes a voltage supply unit (not shown) for applying a voltage to the support substrate 24 and the metal back 17 of the first substrate 10.
- the voltage supply unit is connected to the support substrate 24 and the metal back 17, respectively, and applies, for example, a voltage of 12 kV to the support substrate 24 and a voltage of 10 kV to the metal back 17.
- an anode voltage is applied to the phosphor screen 16 and the metal back 17, and the electron beam emitted from the electron-emitting device 18 is accelerated by the anode voltage to collide with the phosphor screen 16.
- the phosphor layer of the phosphor screen 16 is excited to emit light, and an image is displayed.
- a support substrate 24 having a predetermined dimension and an upper die 36a and a lower die 36b having a rectangular plate shape having substantially the same dimensions as the support substrate are prepared.
- a support substrate made of Fe—50% Ni and having a thickness of 0.12 mm is degreased, washed, and dried, and then the electron beam passage holes 26 and 26a are formed by etching.
- an insulating film is formed on the surface of the support substrate including the inner surfaces of the electron beam passage holes 26 and 26a.
- a coating liquid containing glass as a main component is applied on the insulating film, dried, and baked to form a high-resistance film.
- the support substrate 24 is obtained.
- the upper mold 36a and the lower mold 36b as molding dies are formed in a flat plate shape using a transparent material that transmits ultraviolet light, for example, transparent silicon, transparent polyethylene terephthalate, or the like.
- the upper die 36a has a flat contact surface 41a that is in contact with the support substrate 24, and a number of bottomed spacer forming holes 40a for forming the first spacer 30a. I have.
- the spacer forming holes 4 Oa are respectively opened on the contact surface 41 a of the upper die 36 a and are arranged at predetermined intervals.
- the lower die 36b has a flat contact surface 41b and a number of bottomed spacer forming holes 40b for forming the second spacer 30b.
- Spacer forming hole 4 Obs are respectively opened on the contact surface 41b of the lower die 36b, and are arranged at predetermined intervals.
- a spacer forming material 46 is filled in the spacer forming holes 40a of the upper die 36a and the spacer forming holes 40b of the lower die 36b.
- a glass paste containing at least a UV-curable binder (organic component) and a glass filler is used as the spacer forming material 46. The specific gravity and viscosity of the glass paste are appropriately selected.
- the upper die 36a is placed such that the spacer forming holes 40a filled with the spacer forming material 46 face the regions between the adjacent electron beam passing holes 26, respectively.
- the positioning contact surface 41a is brought into close contact with the first surface 24a of the support substrate 24.
- the lower die 36b is positioned so that each spacer forming hole 40b faces the region between the adjacent electron beam passing holes 26, and the contact surface 41b is closely attached to the second surface 24b of the support substrate 24.
- an adhesive may be applied in advance to the spacer standing position of the support substrate 24 by a dispenser or printing.
- an assembly 42 including the support substrate 24, the upper mold 36a and the lower mold 36b is formed.
- the spacer forming holes 40a of the upper die 36a and the spacer forming holes 40b of the lower die 36b are arranged to face each other with the support substrate 24 interposed therebetween.
- UV ultraviolet rays
- the upper mold 36a and the lower mold 36b are each formed of an ultraviolet transmitting material. Therefore, the ultraviolet rays emitted from the ultraviolet lamps 62a and 62b pass through the upper mold 36a and the lower mold 36b, and are irradiated on the filled spacer forming material 46. As a result, the spacer forming material 46 is cured by ultraviolet rays while maintaining the close contact of the assembly 42.
- the upper die 36a and the lower die 36b are released from the support substrate 24 so that the hardened spacer forming material 46 is left on the support substrate 24.
- the support substrate 24 on which the spacer forming material 46 is provided is heat-treated in a heating furnace, and after the binder is blown out of the spacer forming material, the support substrate 24 is heated at about 500-550 ° C for 30 minutes and 1 hour. The calcining material is fully fired. As a result, a spacer structure 22 in which the first and second spacers 30a and 30b are formed on the support substrate 24 is obtained.
- the phosphor screen 16 and the metal back The first substrate 10 provided and the second substrate 12 provided with the electron-emitting devices 18 and the wirings 21 and joined to the side wall 14 are prepared. Subsequently, the spacer structure 22 obtained as described above is positioned and arranged on the second substrate 12. In this state, the first substrate 10, the second substrate 12, and the spacer assembly 22 are placed in a vacuum chamber, and the inside of the vacuum chamber is evacuated. To join. As a result, an SED including the spacer structure 22 is manufactured.
- the electron beam passage hole 26 a near the spacer standing position has another electron beam passage hole 26 a. It is formed in an area larger than the beam passage hole. Therefore, even when the spacer forming material oozes into the electron beam passage hole 26a at the time of manufacturing the spacer structure, the area covered by the spacer formation material is larger than the entire area of the electron beam passage hole. The ratio becomes smaller. Therefore, it is possible to prevent the electron beam passing through the electron beam passage hole 26a from hitting the exuded spacer forming material. Usually, the spacer forming material that has oozed to the electron beam passage hole side spreads along the edge of the electron beam passage hole.
- the hole edge becomes longer, and the amount of the spacer forming material protruding into the electron beam passage hole can be reduced.
- the force of the electron beam passing through the electron beam passage hole 26a can be prevented from hitting the exuded spacer forming material. From the above, it is possible to provide an SED with improved display quality by suppressing image defects due to bleeding of the spacer forming material.
- the electron beam passage hole 26a is formed in a rectangular shape, and is larger than other electron beam passage holes by enlarging the dimension in the second direction where the arrangement pitch is large. The area is formed. In this case, it is possible to prevent a decrease in the strength of the support substrate 24 that does not require reducing the width of the bridge portion 27 located between the electron beam passage holes arranged in the first direction X.
- each of the other electron beam passage holes 26 has a dimension in the first direction X of 0.2 mm and a dimension L1 in the second direction of 0.2 mm. Have been.
- each opening 26a has a dimension in the first direction X approximately four times that of the electron beam passage hole 26 and a dimension L2 in the second direction of 0.25 mm. Also have a large area.
- the size of each opening 26a is not limited to four electron beam passage holes, but may be two, three, or five or more continuous dimensions.
- the electron beam passage hole 26 near the spacer standing position communicates with the plurality of electron beam passage holes. It is formed by a narrow elongated hole and has a larger area than other electron beam passage holes. Therefore, even when the spacer forming material oozes into the electron beam passage hole 26a at the time of manufacturing the spacer structure, the spacer forming material covers the entire area of the electron beam passage hole. Area ratio is reduced. Therefore, the force of the electron beam passing through the electron beam passage hole 26a can be prevented from hitting the exuded spacer forming material. Usually, the spacer forming material that has oozed to the electron beam passage hole side spreads along the edge of the electron beam passage hole.
- the hole edge becomes longer, and the amount of the spacer forming material protruding into the electron beam passage hole can be reduced.
- the electron beam passing through the electron beam passage hole 26a can be prevented from hitting the exuded spacer forming material. From the above, it is possible to obtain an SED with improved display quality by suppressing image defects due to bleeding of the spacer forming material.
- the spacer assembly 22 has a structure in which the first and second spacers and the support substrate are integrally provided, but the second spacer 30b is provided on the second substrate 12 It may be configured to be formed on the surface. Further, the spacer structure may include only the supporting substrate and the second spacer, and the supporting substrate may be in contact with the first substrate.
- the spacer structure Reference numeral 22 denotes a support substrate 24 made of a rectangular metal plate, and a number of columnar spacers 30 erected integrally on only one surface of the support substrate.
- the support substrate 24 has a first surface 24a facing the inner surface of the first substrate 10 and a second surface 24b facing the inner surface of the second substrate 12, and is arranged in parallel with these substrates.
- a large number of electron beam passage holes 26 are formed in the support substrate 24 by etching or the like.
- the electron beam passage holes 26 are arranged at a first pitch via a bridge portion 27 in a first direction X parallel to the longitudinal direction of the vacuum envelope 15 and in a second direction Y orthogonal to the first direction. They are provided side by side at a second pitch larger than one pitch.
- the electron beam passage holes 26 are arranged to face the electron-emitting devices 18, respectively, and transmit the electron beams emitted from the electron-emitting devices.
- the first and second surfaces 24a and 24b of the support substrate 24 and the inner wall surface of each electron beam passage hole 26 are formed as an insulating layer by a high-resistance film which is mainly made of glass, ceramic, or the like and has an insulating material. More coated.
- the support substrate 24 is provided with the first surface 24a in surface contact with the inner surface of the first substrate 10 via the getter film, the metal back 17, and the phosphor screen 16.
- the electron beam passage holes 26 provided in the support substrate 24 face the phosphor layers R, G, B of the phosphor screen 16.
- each electron-emitting device 18 faces the corresponding phosphor layer through the electron beam passage hole 26.
- a plurality of spacers 30 are erected on the second surface 24b of the support substrate 24, and are respectively located between the electron beam passage holes 26 arranged in the second direction Y. .
- the extended end of each spacer 30 is in contact with the inner surface of the second substrate 12, here, the wiring 21 provided on the inner surface of the second substrate 12.
- Each of the spacers 30 is formed in a tapered shape that tapers radially from the support substrate 24 side toward the extension end.
- the spacer 30 is formed to be about 1.4 mm in height.
- the cross section of the spacer 30 along a direction parallel to the surface of the support substrate is formed to be substantially elliptical.
- Each electron beam passage hole 26 of the support substrate 24 is formed in a rectangular shape. Except for the electron beam passage holes near the spacer standing position, each of the other electron beam passage holes 26 has a dimension in the first direction X of 0.2 mm and a dimension in the second direction of 0.2 mm. I have. Of the electron beam passage holes, the electron beam passage hole 26a near the spacer standing position has a dimension in the first direction X of 0.2 mm and a dimension in the second direction of 0.25 mm. Electron beam passage hole 26 It has a larger area. In the present embodiment, the area of the three electron beam passage holes 26a located on each side of the spacer is formed larger than the other electron beam passage holes. The number of the electron beam passage holes 26a having such a large area is not limited to three, and may be four or more on one side of the spacer if necessary.
- the spacer structure 22 configured as described above is configured such that the support substrate 24 comes into surface contact with the first substrate 10, and the extended end of the spacer 30 comes into contact with the inner surface of the second substrate 12. In addition, an atmospheric load acting on these substrates is supported, and the distance between the substrates is maintained at a predetermined value.
- the third embodiment other configurations are the same as those of the above-described first embodiment, and the same portions are denoted by the same reference characters, and detailed description thereof will be omitted.
- the SED and its spacer structure according to the third embodiment can be manufactured by the same manufacturing method as the manufacturing method according to the above-described embodiment. Also, in the third embodiment, the same operation and effect as in the first embodiment can be obtained.
- the SED includes a first substrate 10 and a second substrate 12 each made of a rectangular glass plate, and these substrates have a gap of about 1.0-2. Omm. And are arranged accordingly.
- the first substrate 10 and the second substrate 12 are joined to each other via a rectangular side wall 14 made of glass to form a flat rectangular vacuum envelope 15 whose inside is maintained in a vacuum. are doing.
- a phosphor screen 16 functioning as a display surface is formed over almost the entire surface.
- the phosphor screen 16 is configured by arranging phosphor layers R, G, B that emit red, blue, and green light and the light-shielding layer 11, and these phosphor layers are formed in a stripe shape or a dot shape. Further, on the phosphor screen 16, a metal back layer 17 and a getter film 19 which are also made of aluminum or the like are sequentially formed.
- a large number of surface conduction electron-emitting devices 18 each emitting an electron beam are provided as electron emission sources for exciting the phosphor layers R, G, and B of the phosphor screen 16. Is provided.
- the electron-emitting devices 18 are arranged in a plurality of columns and a plurality of rows corresponding to each pixel.
- Each electron-emitting device 18 includes an electron-emitting portion (not shown), a pair of device electrodes for applying a voltage to the electron-emitting portion, and the like.
- a large number of wires 21 for supplying a potential to the electron-emitting device 18 are provided in a matrix, and the ends of the wires 21 are drawn out of the vacuum envelope 15.
- the side wall 14 functioning as a joining member is sealed to the peripheral portion of the first substrate 10 and the peripheral portion of the second substrate 12 by a sealing material 20 such as a low melting point glass or a low melting point metal. Substrates are joined together.
- the SED includes a spacer structure 22 provided between the first substrate 10 and the second substrate 12.
- the spacer structure 22 includes a support substrate 24 made of a metal plate, and a number of columnar spacers 30 erected integrally on the support substrate.
- the support substrate 24 is formed in a rectangular shape having a size corresponding to the phosphor screen 16 and has a first surface 24a facing the inner surface of the first substrate 10 and a second surface 24b facing the inner surface of the second substrate 12. And are arranged in parallel with these substrates.
- the support substrate 24 is formed of, for example, an iron-nickel-based metal plate with a thickness of 0.1 to 0.25 mm.
- a plurality of electron beam passage holes 26 are formed in the support substrate 24 by etching or the like.
- the electron beam passage hole 26 is formed in a rectangular shape of, for example, 0.15 to 0.25 mm ⁇ 0.15 to 0.25 mm.
- the electron beam passage holes 26 are arranged at a predetermined pitch along the X direction. In the Y direction, they are arranged at a pitch larger than the pitch in the X direction.
- the phosphor layers R, G, B of the phosphor screen 16 formed on the first substrate 10 and the electron-emitting devices 18 on the second substrate 12 are the same as the electron beam passage holes 26 in the X and Y directions, respectively. They are arranged at a pitch and face the electron beam passage holes, respectively.
- the first and second surfaces 24a and 24b of the support substrate 24 and the inner wall surface of each electron beam passage hole 26 are made of an insulating substance mainly composed of glass or the like, for example, a Li-based alkali borosilicate glass. It is covered with an insulating layer 37 having a thickness of about 40 m.
- the support substrate 24 is provided such that the first surface 24 a is in contact with the getter film 19 of the first substrate 10 via the insulating layer 37.
- the electron beam passage holes 26 provided in the support substrate 24 face the phosphor layers R, G, B of the phosphor screen 16 and the electron-emitting devices 18 on the second substrate 12. As a result, each electron-emitting device 18 passes through the electron beam passage hole 26, It faces the corresponding phosphor layer.
- each spacer 30 is standing upright.
- the extended end of each spacer 30 is in contact with the inner surface of the second substrate 12, here, the wiring 21 provided on the inner surface of the second substrate 12.
- Each of the spacers 30 is also formed in a tapered shape in which the diameter of the support substrate 24 side is reduced toward the extending end.
- the spacer 30 is formed to have a height of about 1.8 mm.
- the cross section of the spacer 30 along a direction parallel to the surface of the support substrate 24 is substantially elliptical.
- Each of the spacers 30 is mainly formed of a spacer forming material mainly composed of glass as an insulating material.
- the support substrate 24 has a plurality of height reducing portions 54 formed at the upright positions of the spacers 30, respectively.
- Each height relaxing portion 54 has a recess 56 formed on the first surface 24a side of the support substrate 24, and is formed to have a thickness of 1 Z2 or less with respect to the thickness of the other portion of the support substrate. .
- each height relaxing portion 54 is formed so as to be elastically deformable in a direction substantially perpendicular to the first surface 24a, that is, along the height direction of the spacer 30!
- Each spacer 30 is erected on the second surface 24b of the support substrate 24 at the height reducing portion 54 and faces the recess 56.
- a plurality of recesses 56 are formed in addition to the recess 56 facing the spacer 30. Each of these recesses 56 is formed on the first surface 24a between the electron beam passage holes 26.
- the recess 56 has such a depth that when the atmospheric pressure acts, it can absorb the variation in height of the spacer 30 and has a deformable strength.
- the recess 56 may be formed by a machine such as a press machine.
- each recess 56 is formed in a shape similar to the end surface of the spacer 30 on the support substrate 24 side, that is, the contact surface.
- the area of the recess 56 is formed larger than the area of the contact surface of the spacer 30.
- the surface of the support substrate 50 is insulated, including the inner surface of the recess 56. Covered by layer 37.
- the spacer structure 22 configured as described above is configured such that the support substrate 24 contacts the first substrate 10, and the extended end of the spacer 30 contacts the inner surface of the second substrate 12.
- the atmospheric load applied to these substrates is supported, and the distance between the substrates is maintained at a predetermined value.
- the SED includes a voltage supply unit (not shown) that applies a voltage to the support substrate 24 and the metal back layer 17 of the first substrate 10. For example, a voltage of 8 kV is applied to the support substrate and a voltage of 10 kV is applied to the metal back layer. Is done.
- the electron-emitting device 18 when displaying an image, the electron-emitting device 18 is driven, an arbitrary electron-emitting device force emits an electron beam, and an anode voltage is applied to the phosphor screen 16 and the metal back layer 17.
- the electron beam emitted from the electron-emitting device 18 is accelerated by the anode voltage, passes through the electron beam passage hole 26 of the support substrate 24, and collides with the phosphor screen 16. As a result, the phosphor layer of the phosphor screen 16 is excited to emit light, and an image is displayed.
- a 0.12 mm thick metal plate made of Fe-50% M is degreased, washed, and dried, and then a resist film is formed on both surfaces. Subsequently, both sides of the metal plate are exposed, developed, and dried to form a resist pattern. Thereafter, an electron beam passing hole 26 of 0.18 ⁇ 0.18 mm is formed at a predetermined position of the metal plate by etching. At the same time, a predetermined position on the first surface side of the metal plate, that is, a surface facing the first substrate 10 is not-fetched to form a recess 56 having a major axis diameter of 3 mm and a minor axis diameter of 0.4 mm. Thereafter, a glass frit is applied to the entire surface of the support substrate 24 at a thickness of 40 / zm, dried, and fired to form the insulating layer 37.
- a rectangular plate-shaped mold having substantially the same dimensions as the support substrate 24 is prepared.
- the molding die is formed in a flat plate shape from a transparent material that transmits ultraviolet light, for example, transparent silicon mainly composed of transparent polyethylene terephthalate.
- the mold has a flat contact surface that contacts the support substrate 24, and a number of bottomed spacer forming holes for forming the spacer.
- the spacer forming holes are each opened on the contact surface of the mold. And are arranged at predetermined intervals.
- Each spacer forming hole has a length of lmm, a width of 0.35mm, and a height of 1.8mm corresponding to the spacer.
- a spacer forming material is filled in the spacer forming hole of the mold.
- a glass paste containing at least a UV-curable binder (organic component) and a glass filler is used as the spacer forming material. The specific gravity and viscosity of the glass paste are appropriately selected.
- the mold is positioned so that the spacer forming hole filled with the spacer forming material is located between the electron beam passing holes, and the contact surface is in close contact with the second surface 24b of the support substrate. Let me do it. Thus, an assembly composed of the support substrate 24 and the mold is formed.
- the filled spacer forming material is irradiated with ultraviolet light (UV) from the outer surface side of the supporting substrate 24 and the mold using, for example, an ultraviolet lamp or the like, so that the spacer forming material is irradiated with UV light. Let it cure.
- the mold is made of transparent silicon as an ultraviolet transmitting material. Therefore, the ultraviolet rays are irradiated directly on the spacer forming material and through the mold. Therefore, the filled spacer forming material can be surely cured to the inside thereof.
- the mold is peeled from the support substrate 24 so that the cured spacer forming material remains on the support substrate 24.
- the support substrate 24 on which the spacer forming material is provided is heat-treated in a heating furnace, and after the binder inside the spacer forming material is blown away, the substrate is heated at about 500-550 ° C for 30 minutes and 1 hour.
- the precursor forming material is fully baked and vitrified. As a result, a spacer structure 22 in which the spacer 30 is integrally formed on the second surface 24b of the support substrate 24 is obtained.
- the bonded second substrate 12 is prepared.
- the four corners of the support substrate 24 are formed of metal made upright at the four corners of the second substrate. Weld to the column. Thereby, the spacer structure 22 is fixed to the second substrate 12.
- the support substrate 24 may be fixed at least at two locations.
- the first substrate 10 and the second substrate 12 to which the spacer structure 22 is fixed are vacuum-chambered. After evacuating the inside of the vacuum chamber, a getter film 19 is formed on the metal back layer 17 of the first substrate. Subsequently, the first substrate is joined to the second substrate via the side wall 14, and the spacer structure 22 is sandwiched between these substrates. Thus, an SED having the spacer structure 22 is manufactured.
- the spacer 30 by providing the spacer 30 only on the second substrate 12 side of the support substrate 24, the length of each spacer is increased, and the support substrate 24 And the second substrate 12 can be separated. Thereby, the pressure resistance between the support substrate and the second substrate is improved, and it is possible to suppress the occurrence of discharge between them.
- the support substrate 24 has a height relief portion 54, and each spacer 30 is provided on the height relief portion.
- the height relief portion 54 acts as a panel panel or a counter panel, and even when the spacer 30 has a variation in height or the like, it is elastically deformed in the height direction of the spacer, Absorbs height variations. Therefore, the atmospheric pressure load acting on the first substrate 10 and the second substrate 12 can be stably supported by the spacer 30, and the atmospheric pressure resistance of the vacuum envelope 15 can be improved. At the same time, it is possible to prevent the spacer from being damaged due to the height variation.
- the support substrate 24 is covered with the insulating layer 37, the support substrate itself also functions as a shield that suppresses discharge. Therefore, it is possible to obtain an SED that suppresses generation of electric discharge and has improved atmospheric pressure resistance.
- the first surface 24 a of the support substrate 24 is in contact with the first substrate 10 via the getter film 19.
- the metal back layer 17 and the support substrate 24 have the same potential, and the metal back layer 17 and the getter film 19 are interposed between the first substrate 10 and the support substrate 24.
- peeling of the metal back layer 17 and the getter film 19 and damage of the metal back layer and the phosphor screen can be prevented.
- good image quality can be maintained over a long period of time.
- the occurrence of discharge due to the peeled metal back layer and getter film is suppressed, and an SED with improved reliability can be obtained.
- a plurality of recesses 56 are formed on the first surface 24a of the supporting substrate 24 in contact with the getter film 19.
- Each of the recesses communicates with the inside of the vacuum envelope through grooves, holes and the like (not shown). Therefore, even when the getter film 19 is covered with the support substrate 24, the contact area between the support substrate and the getter film 19 can be reduced, and the exposed area of the getter film can be increased. This makes it possible to reduce a decrease in getter efficiency and maintain a high vacuum.
- the recess 56 of the support substrate 24 is formed in a shape similar to the end face of the spacer 30, but the shape may be any shape having an area larger than this end face. Can be changed as needed.
- the concave portion 56 is formed by a groove extending between the electron beam passage holes 26 of the support substrate 24, and is continuous over a plurality of height relaxing portions 54 arranged in the long axis X direction. It may extend. The number of recesses 56 can be increased or decreased as needed.
- the SED includes a first substrate 10 and a second substrate 12 each made of a rectangular glass plate, and these substrates have a gap of about 1.0-2. Omm. And are arranged in opposite directions.
- the first substrate 10 and the second substrate 12 are joined to each other via a rectangular frame-shaped side wall 14 made of glass and constitute a flat vacuum envelope 15 whose inside is maintained in a vacuum. I have. If the direction parallel to the long side of the first substrate 10 and the second substrate 12 is the first direction X and the direction parallel to the short side is the second direction Y, the effective display area of the SED is 800 mm in the first direction X.
- the second direction Y is formed in a rectangular shape of 500 mm!
- a phosphor screen 16 is formed on the inner surface of the first substrate 10.
- the phosphor screen 16 is configured by arranging phosphor layers R, G, and B (only the phosphor layer G is shown) that emits red, blue, and green light, and the light shielding layer 11, and these phosphor layers are formed in a stripe shape. It is formed in a dot shape or a rectangular shape.
- a metal back 17 made of a color such as aluminum and a getter film 19 are sequentially formed on the phosphor screen 16.
- a large number of surface conduction electron-emitting devices 18 each emitting an electron beam are provided as electron emission sources for exciting the phosphor layers R, G, and B of the phosphor screen 16. Is provided. These electron-emitting devices 18 are arranged in a plurality of columns and a plurality of rows corresponding to each pixel. Each of the electron-emitting devices 18 includes an electron-emitting portion (not shown), a pair of device electrodes for applying a voltage to the electron-emitting portion, and the like.
- a number of wirings 21 for supplying a potential to the electron-emitting device 18 are provided in a matrix, and the ends of the wirings 21 are drawn out of the vacuum envelope 15.
- the side wall 14 is sealed to the peripheral portion of the first substrate 10 and the peripheral portion of the second substrate 12 by a sealing material 20 such as a low-melting glass, a low-melting metal, or the like. I have.
- the SED includes a plurality of, for example, four spacer structures 22a, 22b, 22c, 22d disposed between the first substrate 10 and the second substrate 12.
- Each spacer structure 22a, 22b, 22c, 22d is integrally formed on both sides of the support substrate 24, which is a rectangular metal plate disposed between the first and second substrates 10, 12, and on both surfaces of the support substrate.
- the four spacer structures 22a, 22b, 22c, and 22d have the same structure, are provided side by side with a gap in the second direction Y, and are disposed so as to cover the entire display area.
- the support substrate 24 is formed in an elongated rectangular shape having a length in the first direction X of 800 mm and a length in the second direction Y of 120 mm. .
- the support substrate 24 has a first surface 24a facing the inner surface of the first substrate 10 and a second surface 24b facing the inner surface of the second substrate 12, and is arranged in parallel with these substrates.
- a large number of electron beam passage holes 26 are formed in the support substrate 24 by etching or the like.
- the electron beam passage holes 26 are arranged at a first pitch in a first direction X via a bridge portion, and are arranged in a second direction at a second pitch larger than the first pitch.
- the electron beam passage holes 26 are arranged to face the electron-emitting devices 18, respectively, and transmit the electron beams emitted from the electron-emitting devices.
- the support substrate 24 is formed of, for example, an iron-nickel-based metal plate to a thickness of 0.1 to 0.3 mm. On the surface of the support substrate 24, an oxide film made of an element constituting the metal plate, for example, an oxidized film having a force of FeO or NiFeO is formed. Also, the surface 24a of the support substrate 24
- each electron beam passage hole 26 is covered with an insulating layer 27 mainly composed of, for example, glass, ceramic or the like. Further, the surfaces 24a and 24b, the peripheral portions, and the wall surfaces of the electron beam passage holes 26 of the support substrate 24 are covered with a coat layer 28 as a high resistance film having an effect of preventing generation of secondary electrons.
- the coat layer 28 is formed so as to overlap the insulating layer 27. [0086]
- the coat layer 28 contains a material having a low secondary electron emission coefficient of 0.4 to 2.0, for example, chromium oxide. Although various materials having such a low secondary electron emission coefficient have been found, they are generally present in many good conductors having free electrons.
- a relatively high voltage of about 10 kV is applied between the first substrate and the second substrate. Therefore, a relatively high-resistance material such as an insulating material or a semiconductor is selected as the coating layer.
- the volume resistivity of chromium oxide is relatively high, about 10 5 ⁇ cm, and it is a material with a low secondary electron emission coefficient.
- the surface resistance of the support substrate 24 forming the spacer structure 22 is desirably 10 7 ⁇ cm or more. Therefore, in the present embodiment, the surface resistance value of the support substrate 24 is increased macroscopically by forming the coat layer 28 with a composite material in which glass paste and oxidized chromium powder are mixed to obtain a discharge suppressing effect. ing.
- a plurality of first spacers 30a are erected on the first surface 24a of the support substrate 24, and are respectively arranged in the second direction Y. It is located between the electron beam passage holes 26.
- the tip of the first spacer 30a is in contact with the inner surface of the first substrate 10 via the getter film 19, the metal back 17, and the light shielding layer 11 of the phosphor screen 16.
- a plurality of second spacers 30b are erected on the second surface 24b of the support substrate 24, and are respectively located between the electron beam passage holes 26 arranged in the second direction Y. .
- the tip of the second spacer 30b is in contact with the inner surface of the second substrate 12.
- the tip of each second spacer 30 b is located on the wiring 21 provided on the inner surface of the second substrate 12.
- the first and second spacers 30a and 30b are located in alignment with each other, and are formed integrally with the support substrate 24 with the support substrate 24 sandwiched from both sides.
- Each of the first and second spacers 30a and 30b is formed in a tapered shape in which the diameter of the support substrate 24 is also reduced toward the extending end.
- each of the first spacers 30a has a substantially elliptical cross-sectional shape, the diameter of the base end located on the support substrate 24 side is about 0.3 mm X 2 mm, and the diameter of the extension end is about 0.3 mm. It is formed to be 2mm X 2mm and about 0.6mm in height.
- Each of the second spacers 30b has a substantially elliptical cross-sectional shape, and has a diameter of about 0.3 mm X 2 mm at a base end located on the support substrate 24 side and a diameter of about 0.2 mm X 2 mm at an extension end. , And the height is about 0.8 mm.
- the four spacer structures 22a, 22b, 22c, and 22d configured as described above are respectively supported.
- the holding substrates 24 are arranged with their long sides extending in parallel with the first direction X of the second substrate 12 and with a gap in the second direction.
- the four support substrates 24 are arranged in parallel with each other and in parallel with the first substrate 10 and the second substrate. Both ends in the first direction X of each support substrate 24 are fixed to support members 32 erected on the inner surface of the second substrate 12, respectively.
- the first and second spacers 30a and 30b of each spacer structure abut the inner surfaces of the first substrate 10 and the second substrate 12, thereby supporting the atmospheric load acting on these substrates, The distance between the substrates is maintained at a predetermined value.
- the SED includes a voltage supply unit (not shown) for applying a voltage to the support substrate 24 and the metal back 17 of the first substrate 10.
- the voltage supply unit is connected to the support substrate 24 and the metal back 17, and applies, for example, a voltage of 12 kV to the support substrate 24 and a voltage of 10 kV to the metal back 17.
- an anode voltage is applied to the phosphor screen 16 and the metal back 17, and the electron beam emitted from the electron-emitting device 18 is accelerated by the anode voltage to collide with the phosphor screen 16.
- the phosphor layer of the phosphor screen 16 is excited to emit light, and an image is displayed.
- a support substrate 24 having a predetermined size and a rectangular plate-shaped upper die and lower die having substantially the same dimensions as the support substrate are prepared.
- a metal plate having a thickness of 0.12 mm containing 45 to 55% by weight of nickel, the balance of iron, and unavoidable impurities is used.
- an electron beam passage hole 26 is formed by etching.
- an insulating layer 27 is formed on the surface of the metal plate including the inner surface of the electron beam passage hole 26.
- Chromium oxide raw material should have a particle size of 0.1-10 / z m and a purity of 98-99.9%
- the coat layer 28 is not limited to a coating film, and may be a layer in which chromium oxide is formed into a thin film on the surface of a supporting substrate by vacuum evaporation, sputtering, ion plating, or a sol-gel method. As good as
- the upper mold and the lower mold as molding dies are formed in a flat plate shape using a transparent material that transmits ultraviolet light, for example, transparent silicon, transparent polyethylene terephthalate, or the like.
- the upper mold has a flat contact surface that is in contact with the support substrate 24, and a number of bottomed spacer forming holes for forming the first spacer 30a.
- the spacer forming holes are respectively opened on the contact surface of the upper die and are arranged at predetermined intervals.
- the lower die has a flat contact surface and a number of bottomed spacer forming holes for forming the second spacer 30b.
- the spacer forming holes are respectively opened on the contact surface of the lower die, and are arranged at predetermined intervals.
- a spacer forming material is filled in the upper die spacer forming hole and the lower die spacer forming hole.
- a spacer forming material a glass paste containing at least an ultraviolet-curable binder (organic component) and a glass filler is used. The specific gravity and viscosity of the glass paste are appropriately selected.
- the upper die is positioned and the contact surface is brought into close contact with the first surface 24a of the support substrate 24 so that the spacer forming holes filled with the spacer forming material respectively face between the electron beam passing holes 26. Let it.
- the lower die is positioned so that each spacer forming hole faces between the electron beam passing holes 26, and the contact surface is brought into close contact with the second surface 24b of the support substrate 24.
- an adhesive may be applied in advance to the spacer standing position of the support substrate 24 by a dispenser or printing.
- the support substrate 24 and the upper mold and the lower mold constitute an assembly. In the assembly, the upper die forming hole and the lower die forming hole are arranged to face each other with the support substrate 24 interposed therebetween.
- UV light ultraviolet light
- the upper mold and the lower mold are each formed of an ultraviolet transmitting material. Therefore, the ultraviolet light emitted from the ultraviolet lamp is transmitted through the upper mold and the lower mold, and is applied to the filled spacer forming material. In this way, the spacer forming material is cured with ultraviolet light while maintaining the close contact of the assembly.
- the upper mold and the lower mold are released from the support substrate 24 so that the cured spacer forming material is left on the support substrate 24.
- the supporting substrate 2 provided with the spacer forming material is provided. 4 is heat-treated in a heating furnace to remove the inner force of the spacer-forming material. After the binder is blown, the spacer-forming material is fully fired at about 500-550 ° C for 30 minutes and 1 hour. Thus, a spacer structure in which the first and second spacers 30a and 30b are formed on the support substrate 24 is obtained. With the same configuration, four spacer structures 22a, 22b, 22c, and 22d are formed.
- the second substrate 12 is prepared.
- the spacer structures 22a, 22b, 22c, and 22d obtained as described above are positioned and arranged on the second substrate 12, and fixed to the support member 32.
- the first substrate 10, the second substrate 12, and the spacer structure 22 are arranged in a vacuum chamber, and after evacuating the vacuum chamber, the first substrate is connected to the second substrate via the side wall 14. Join.
- the SED including the spacer structures 22a, 22b, 22c, and 22d is manufactured.
- each of the spacer structures 22a, 22b, 22c, and 22d is formed into a horizontally long strip of 800 mm XI 20 mm.
- the vertical direction that is, in the second direction Y. Therefore, each spacer structure can be independently positioned with respect to the first and second substrates, and the spacer structure is compared with a case where a single spacer structure covering the entire display area is used.
- the alignment accuracy of the substructure can be improved.
- the positioning accuracy in the short second direction Y can be significantly improved.
- each spacer structure can be manufactured at low cost by an existing manufacturing method. Therefore, even if the pixel pitch of the SED is reduced and the definition is increased, or if the SED is enlarged, the spacer structure must be positioned with high accuracy with respect to the electron-emitting device. Can be. As a result, a large and high-definition SED can be obtained.
- the surface and peripheral edge of the support substrate 24 in each spacer structure are covered with a coat layer 28 containing a material having a secondary electron emission coefficient of 0.4 to 2.0. Therefore, some of the electrons emitted from the electron-emitting device 18 strike the surface of the support substrate 24. Even in the case of collision, generation of secondary electrons on the surface of the supporting substrate can be significantly reduced. As a result, it is possible to suppress the occurrence of discharge due to secondary electron emission, and to prevent destruction or deterioration of the electron emission element, the phosphor screen, and the wiring on the first substrate due to the discharge.
- the number of divided spacer structures is not limited to four, and can be increased or decreased as necessary.
- the dividing direction of the spacer structure is not limited to the second direction Y, and may be a configuration in which the spacer structure is divided in the first direction or the first and second directions.
- the support substrate 24 of each spacer structure is formed in an elongated strip shape in the second direction Y, for example, 200 mm in the first direction X and 500 mm in the second direction Y.
- a large number of electron beam passage holes 26 are formed in the support substrate 24.
- a plurality of first spacers 30a are erected on the first surface 24a of the support substrate 24, and a plurality of second spacers 30b are erected on the second surface 24b. Have been.
- the five spacer structures 22a, 22b, 22c, 22d, and 22e each have the long side of the support substrate 24 extending in parallel with the second direction Y of the second substrate 12, and in the first direction. It is arranged with a gap in.
- the five support substrates 24 are arranged in parallel with each other and in parallel with the first substrate 10 and the second substrate. Both ends in the second direction X of each support substrate 24 are fixed to support members 32 erected on the inner surface of the second substrate 12.
- the first and second spacers 30a and 30b of each spacer structure abut the inner surfaces of the first substrate 10 and the second substrate 12, thereby supporting the atmospheric load acting on these substrates. , Maintain the spacing between substrates at a predetermined value
- the display area has the first direction X of 1200. mm, and the second direction Y was formed to be 750 mm. Further, four spacer structures 22a, 22b, 22c, 22d divided in the first direction X and the second direction Y are provided.
- the support substrate 24 of each spacer structure is formed in a substantially similar rectangular shape to the second substrate 10, for example, the first direction X is formed to be 600 mm, and the second direction Y is formed to be 375 mm.
- a large number of electron beam passage holes 26 are formed in the support substrate 24.
- a plurality of first spacers 30a are erected on the first surface 24a of the support substrate 24, and a plurality of second spacers 30b are erected integrally on the second surface 24b. ing.
- the four spacer structures 22a, 22b, 22c, and 22d have the long sides and the short sides of the support substrate 24 extending in parallel with the first direction X and the second direction Y of the second substrate 12, respectively. And are arranged in two rows and two columns with a gap in the first direction and the second direction.
- the four support substrates 24 are arranged in parallel with each other and in parallel with the first substrate 10 and the second substrate. Of the corners of each support board 24, the corners facing the other support board and located on the peripheral side of the first board 12 are fixed to the support members 32 erected on the inner surface of the second board 12. Has been done. That is, in each support substrate 24, two corners that do not enter the image effective area are fixed to the support member 32.
- the first and second spacers 30a, 30b of each spacer structure support the atmospheric load acting on these substrates by contacting the inner surfaces of the first substrate 10 and the second substrate 12, and The interval between them is maintained at a predetermined value.
- the other configuration is the same as that of the above-described fifth embodiment, and the same portions will be denoted by the same reference characters and detailed description thereof will be omitted. Also in the seventh embodiment, the same operation and effect as those of the first embodiment can be obtained.
- the plurality of spacer structures may be formed to have the same dimensions as each other, and may be formed to have mutually different dimensions.
- each spacer structure has a structure in which the first and second spacers and the support substrate are integrally provided.
- the second spacer 30b includes the second substrate 12b. It may be formed on the top.
- each spacer structure may include only the supporting substrate and the second spacer, and the supporting substrate may be in contact with the first substrate.
- each spacer structure The body has a support substrate 24 made of a rectangular metal plate, and a number of columnar spacers 30 erected integrally on only one surface of the support substrate.
- the support substrate 24 has a first surface 24a facing the inner surface of the first substrate 10 and a second surface 24b facing the inner surface of the second substrate 12, and is arranged in parallel with these substrates.
- a large number of electron beam passage holes 26 are formed in the support substrate 24 by etching or the like.
- the electron beam passage holes 26 are arranged to face the electron-emitting devices 18, respectively, and transmit the electron beams emitted from the electron-emitting devices.
- the first and second surfaces 24a and 24b of the support substrate 24 and the inner wall surface of each electron beam passage hole 26 are covered with an insulating layer 27 mainly composed of glass, ceramic, or the like as an insulating layer.
- a coat layer 28 is formed on the insulating layer.
- the support substrate 24 is provided with its first surface 24a in surface contact with the inner surface of the first substrate 10 via the getter film 19, the metal back 17, and the phosphor screen 16.
- the electron beam passage holes 26 provided in the support substrate 24 face the phosphor layers R, G, B of the phosphor screen 16. Thus, each electron emission element 18 faces the corresponding phosphor layer through the electron beam passage hole 26.
- a plurality of spacers 30 are erected on the second surface 24b of the support substrate 24, and are respectively positioned between the electron beam passage holes 26.
- the extended end of each spacer 30 is in contact with the inner surface of the second substrate 12, here, the wiring 21 provided on the inner surface of the second substrate 12.
- Each of the spacers 30 is formed in the shape of a tapered taper whose diameter decreases from the support substrate 24 side toward the extension end.
- the spacer 30 is formed to have a height of about 1.4 mm.
- the cross section of the spacer 30 along a direction parallel to the surface of the support substrate is formed to be substantially elliptical.
- the four spacer structures 22a, 22b, 22c, 22d configured as described above are arranged with a gap in the second direction Y, for example, and cover the entire display area.
- Each spacer structure is configured such that the supporting substrate 24 comes into surface contact with the first substrate 10, and the extended end of the spacer 30 comes into contact with the inner surface of the second substrate 12. And the distance between the substrates is maintained at a predetermined value.
- the other configuration is the same as that of the above-described first embodiment, and the same portions are denoted by the same reference characters, and detailed description thereof will be omitted.
- Eighth embodiment The SED and the spacer structure according to the above can be manufactured by the same manufacturing method as the manufacturing method according to the above-described embodiment. Also in the eighth embodiment, the same operation and effect as in the fifth embodiment can be obtained.
- the SED is provided with, for example, four divided spacer structures 22a, 22b, 22c, and 22d.
- Each spacer structure has a support substrate 24 made of a rectangular metal plate, and a number of columnar spacers 30 erected integrally on only one surface of the support substrate.
- the support substrate 24 has a first surface 24a facing the inner surface of the first substrate 10 and a second surface 24b facing the inner surface of the second substrate 12, and is arranged in parallel with these substrates.
- a large number of electron beam passage holes 26 are formed in the support substrate 24 by etching or the like.
- the electron beam passage holes 26 are arranged to face the electron emitting elements 18 respectively, and transmit the electron beams emitted from the electron emitting elements.
- the first and second surfaces 24a and 24b of the support substrate 24 of each spacer structure, and the inner wall surfaces of the electron beam passage holes 26 are used as insulating layers as insulating layers mainly composed of glass, ceramic, or the like. 27, and a coating layer 28 is formed on the insulating layer.
- the support substrate 24 is provided with its first surface 24a in surface contact with the inner surface of the first substrate 10 via the getter film 19, the metal back 17, and the phosphor screen 16.
- the electron beam passage holes 26 provided in the support substrate 24 face the phosphor layers R, G, B of the phosphor screen 16.
- each electron-emitting device 18 faces the corresponding phosphor layer through the electron beam passage hole 26.
- each spacer 30 is erected on the second surface 24b, and are respectively positioned between the electron beam passage holes 26.
- the extended end of each spacer 30 is in contact with the inner surface of the second substrate 12, here, the wiring 21 provided on the inner surface of the second substrate 12.
- Each of the spacers 30 is formed in the shape of a tapered taper whose diameter decreases from the support substrate 24 side toward the extension end.
- the spacer 30 is formed to be about 1.4 mm in height.
- the cross section of the spacer 30 along a direction parallel to the surface of the support substrate is formed to be substantially elliptical.
- each electron beam passage hole 26 formed in the support substrate 24 is formed in a rectangular shape.
- each of the other electron beam passage holes 26 has a dimension in the first direction X of 0.2 mm and a dimension L1 in the second direction of 0.2 mm. Is formed.
- the electron beam passage hole 26a near the spacer standing position has a dimension in the first direction X of 0.2 mm and a dimension L2 in the second direction of 0.25 mm. It has an area larger than the electron beam passage hole 26 of FIG.
- the electron beam passage holes 26a near the spacer standing position indicate the electron beam passage holes facing the first and second spacers 30a and 30b, and in this embodiment, each side of the spacer is used.
- the area of the three electron beam passage holes 26a located at is larger than the other electron beam passage holes.
- the number of the electron beam passage holes 26a having such a large area is not limited to three, and may be four or more on one side of the spacer if necessary.
- each spacer structure has a plurality of height reduction portions 54 formed at the standing positions of the spacers 30, respectively.
- Each height relief portion 54 has a recess 56 formed on the first surface 24a side of the support substrate 24, and is formed to have a thickness of 1Z2 or less with respect to the thickness of the other portions of the support substrate.
- each height relaxing portion 54 is formed to be elastically deformable in a direction substantially perpendicular to the first surface 24a, that is, along the height direction of the spacer 30.
- Each spacer 30 is provided on the second surface 24b of the supporting substrate 24, and stands upright at the height reducing portion 54, and faces the recess 56.
- the recess 56 has such a depth that it can absorb the variation in height of the spacer 30 and has a deformable strength when atmospheric pressure acts.
- the recess 56 may be formed by a machine such as a press machine.
- each recess 56 is formed in a shape similar to the end surface of the spacer 30 on the support substrate 24 side, that is, the contact surface.
- the area of the recess 56 is formed larger than the area of the contact surface of the spacer 30.
- the surface of the support substrate 50, including the inner surface of the recess 56, is covered with the insulating layer 37.
- the four spacer structures 22a, 22b, 22c, 22d configured as described above are arranged with a gap in the second direction Y, for example, and cover the entire display area.
- Each spacer structure is configured such that the supporting substrate 24 comes into surface contact with the first substrate 10, and the extended end of the spacer 30 comes into contact with the inner surface of the second substrate 12. And the distance between the substrates is maintained at a predetermined value.
- the ninth embodiment other configurations are the same as those of the above-described first, fourth, and eighth embodiments, and the same portions are denoted by the same reference characters and will be described in detail. Is omitted.
- the SED and its spacer structure according to the ninth embodiment can be manufactured by the same manufacturing method as the manufacturing method according to the above-described embodiment.
- the same operation and effect as those of the first, fourth, and fifth embodiments can be obtained.
- the present invention is not limited to the above-described embodiment as it is, and may be embodied in a practical stage by modifying the components without departing from the scope of the invention.
- Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components, such as all components shown in the embodiment, may be deleted. Furthermore, constituent elements over different embodiments may be appropriately combined.
- the diameter and height of the spacer, the dimensions and materials of the other components, and the like can be appropriately selected as necessary without being limited to the above-described embodiment.
- Various filling conditions of the spacer forming material can be selected as needed.
- the present invention is not limited to one using a surface conduction electron-emitting device as an electron source, but is also applicable to an image display device using another electron source such as a field emission type or a carbon nanotube.
- the electron beam passage hole in the vicinity of the spacer standing position has a larger area than the other electron beam passage holes. It is possible to provide an image display device in which image defects due to material bleeding are suppressed and display quality is improved. Further, it is possible to provide an image display device in which the generation of discharge is suppressed and the atmospheric pressure resistance is improved.
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05709517A EP1722392A1 (en) | 2004-02-03 | 2005-01-31 | Image display device |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-026526 | 2004-02-03 | ||
JP2004026526A JP2005222715A (ja) | 2004-02-03 | 2004-02-03 | 画像表示装置 |
JP2004037574A JP2005228657A (ja) | 2004-02-16 | 2004-02-16 | 画像表示装置 |
JP2004-037574 | 2004-02-16 | ||
JP2004044388A JP2005235621A (ja) | 2004-02-20 | 2004-02-20 | 画像表示装置 |
JP2004-044388 | 2004-02-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005076310A1 true WO2005076310A1 (ja) | 2005-08-18 |
Family
ID=34841509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/001360 WO2005076310A1 (ja) | 2004-02-03 | 2005-01-31 | 画像表示装置 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1722392A1 (ja) |
KR (1) | KR20060120268A (ja) |
TW (1) | TW200529270A (ja) |
WO (1) | WO2005076310A1 (ja) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10269970A (ja) * | 1997-03-25 | 1998-10-09 | Canon Inc | 画像形成装置 |
JP2002063859A (ja) * | 2000-05-25 | 2002-02-28 | Toshiba Corp | 画像表示装置およびその製造方法 |
WO2002023578A1 (fr) * | 2000-09-18 | 2002-03-21 | Hitachi, Ltd. | Dispositif d'affichage |
JP2002334670A (ja) * | 2001-05-09 | 2002-11-22 | Hitachi Ltd | 表示装置 |
JP2003051255A (ja) * | 2001-08-08 | 2003-02-21 | Toshiba Corp | スペーサアッセンブリの製造方法、およびこのスペーサアッセンブリを備えた画像表示装置の製造方法 |
JP2003272546A (ja) * | 2003-04-17 | 2003-09-26 | Matsushita Electric Ind Co Ltd | 画像表示装置 |
JP2003297266A (ja) * | 2002-04-03 | 2003-10-17 | Toshiba Corp | 画像表示装置およびその製造方法 |
-
2005
- 2005-01-31 KR KR1020067017767A patent/KR20060120268A/ko active IP Right Grant
- 2005-01-31 WO PCT/JP2005/001360 patent/WO2005076310A1/ja not_active Application Discontinuation
- 2005-01-31 EP EP05709517A patent/EP1722392A1/en not_active Withdrawn
- 2005-02-02 TW TW094103256A patent/TW200529270A/zh unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10269970A (ja) * | 1997-03-25 | 1998-10-09 | Canon Inc | 画像形成装置 |
JP2002063859A (ja) * | 2000-05-25 | 2002-02-28 | Toshiba Corp | 画像表示装置およびその製造方法 |
WO2002023578A1 (fr) * | 2000-09-18 | 2002-03-21 | Hitachi, Ltd. | Dispositif d'affichage |
JP2002334670A (ja) * | 2001-05-09 | 2002-11-22 | Hitachi Ltd | 表示装置 |
JP2003051255A (ja) * | 2001-08-08 | 2003-02-21 | Toshiba Corp | スペーサアッセンブリの製造方法、およびこのスペーサアッセンブリを備えた画像表示装置の製造方法 |
JP2003297266A (ja) * | 2002-04-03 | 2003-10-17 | Toshiba Corp | 画像表示装置およびその製造方法 |
JP2003272546A (ja) * | 2003-04-17 | 2003-09-26 | Matsushita Electric Ind Co Ltd | 画像表示装置 |
Also Published As
Publication number | Publication date |
---|---|
TW200529270A (en) | 2005-09-01 |
KR20060120268A (ko) | 2006-11-24 |
EP1722392A1 (en) | 2006-11-15 |
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