JP3053656U - Fluorescent display tube - Google Patents

Abstract

(57) [Problem] To prevent problems such as contact between adjacent light emitting units even if the light emitting units are made finer and more highly integrated. SOLUTION: The relationship between a hole diameter d1 of a through hole 103a and a through hole interval d2 is d2 ≧ 2d1 and 50 μm.
m ≦ d1 ≦ 250 μm.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a fluorescent display tube for displaying an image by using light emission obtained by bombarding a phosphor with electrons.

[0002]

[Prior art]

 The fluorescent display tube is a tube in which a desired pattern is displayed by causing thermoelectrons emitted from a cathode, called a filament, to collide with a phosphor and emit light in a transparent vacuum vessel. The phosphor is applied in the form of a pattern to be displayed on the anode. Usually, a triode structure having a grid for controlling the action of electrons is most often used.

FIG. 2 is a cross-sectional view showing a configuration of a normal fluorescent display tube. As shown in FIG. 2, a wiring layer 202 is formed on a glass substrate 201, and an insulating layer 203 is formed on a wiring layer 202. An anode electrode (anode) 204 is formed at a predetermined position on the insulating layer 203. The anode electrode 204 is connected to a predetermined position of the wiring layer 202 through a through hole 203a formed in the insulating layer 203. Have been. A light emitting unit 205 is formed on the anode electrode 204. The light emitting section 205 is made of a phosphor.

A grid 206 is arranged above the light emitting unit 205, and a filament 207 is arranged thereon. On the other hand, a spacer glass 208 is disposed at an end of the glass substrate 201, and a transparent windshield 209 is disposed thereon so as to face the glass substrate 201. The glass substrate 201 and the spacer glass 208 and the spacer glass 208 and the front glass 209 are bonded and fixed to each other with the frit glass 210 to form an envelope (vacuum container). The fluorescent display tube has a configuration in which light emitted from the light emitting unit 205 is viewed through the windshield 209. Although not shown, a lead is provided through a frit glass 210 at a contact portion between the spacer glass 208 and the glass substrate 201, and the lead is connected to the wiring layer 202.

[0005]

[Problems to be solved by the invention]

 By the way, if the light emitting units 205 constituting the displayed pattern are to be arranged in a predetermined area in a smaller shape, the interval between them becomes smaller. Then, the interval between the through holes 203a of the adjacent light emitting units 205 is also reduced. Then, due to the characteristics of the insulating layer 203 and the like, as shown in FIG. 3, there is no flat region above the insulating layer 203 between the adjacent through holes 203a. If the light emitting portion 205 is formed in this state, there is a problem that the light emitting portion 205 contacts the adjacent light emitting portion 205 and the anode electrode 204 when the light emitting portion 205 is formed.

Therefore, the present invention aims to prevent problems such as contact between adjacent light emitting units from occurring even if the light emitting units are made finer and more highly integrated.

[0007]

[Means for Solving the Problems]

 The fluorescent display tube of the present invention has an electron emitting portion for emitting electrons, a grid for controlling the flow of the emitted electrons, a wiring layer formed on a substrate constituting a part of a vacuum vessel, and a An insulating layer formed on the wiring layer, a plurality of anode electrodes connected to the wiring layer through a plurality of through holes formed in the insulating layer, and light emitted upon collision of electrons formed on the anode electrode In a fluorescent display tube provided with a plurality of light-emitting portions made of a fluorescent substance in a vacuum vessel, a hole diameter d1 of a through hole and a distance d2 between adjacent through holes are d2 ≧ 2d1 and 50 μm ≦ d1 ≦ 250 μm. It was made to be the relationship. As a result, in this fluorescent display tube, a flat area is formed on the insulating layer between the adjacent through holes.

[0008]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described. FIG. 1 is a sectional view showing a configuration of a fluorescent display tube according to an embodiment of the present invention. First, a schematic configuration of the fluorescent display tube according to the first embodiment will be described. As shown in FIG. 1A, a wiring layer 102 is formed on a glass substrate 101, and an insulating layer 103 is formed on the wiring layer 102. An anode electrode (anode) 104 is formed at a predetermined position on the insulating layer 103, and the anode electrode 104 is connected to a predetermined position of the wiring layer 102 through a through hole 103 a formed in the insulating layer 103. Have been. A light emitting unit 105 is formed on the anode electrode 104. The light emitting section 105 is made of a phosphor.

Here, the formation of the light emitting unit 105 will be briefly described. First, a Zn0 / Zn phosphor is dissolved in a predetermined solvent, and a binder is added thereto to form a paste. Then, the paste is printed at a predetermined location by, for example, a screen printing method, and a pattern made of the paste is formed at a location where the light emitting unit 105 is disposed. Then, the paste pattern is dried to remove the solvent, and then baked, whereby the light emitting portion 105 can be formed.

A grid 106 is disposed above the light emitting unit 105, and a filament 107 as an electron emitting unit is disposed thereon. On the other hand, a spacer glass 108 is disposed at an end of the glass substrate 101, and a transparent front glass 109 is disposed thereon so as to face the glass substrate 101. The glass substrate 101 and the spacer glass 108, and the spacer glass 108 and the front glass 109 are bonded and fixed by frit glass 110, respectively, to form an envelope (vacuum container). The fluorescent display tube has a configuration in which light emitted from the light emitting unit 105 is viewed through the front glass 109. Although not shown, a lead is provided through a frit glass 110 at a contact portion between the spacer glass 108 and the glass substrate 101, and the lead is connected to the wiring layer 102.

In this embodiment, as shown in FIG. 1B, the relationship between the hole diameter d1 of the through hole 103a and the through hole interval d2 is d2 ≧ 2d1 and 50 μm ≦ d1 ≦ 250 μm. I did it. Since the hole diameter d1 and the distance d2 between the through holes are defined in this manner, a sufficient distance can be secured between the ends of the adjacent through holes 103, and as shown in FIG. A flat area is formed between the holes 103. For this reason, as described above, even if a paste pattern is printed to form the light emitting portion 105, the paste pattern does not flow to the adjacent anode electrode 104 forming portion, and each paste pattern is completely separated. Can be formed. As a result, the end of the light emitting unit 105 is prevented from contacting the adjacent light emitting unit 105 and the anode electrode 104.

[0012]

[Effect of the invention]

 As described above, the present invention provides an electron emitting portion that emits electrons, a grid that controls the flow of the emitted electrons, and a wiring layer formed on a substrate that constitutes a part of a vacuum vessel. An insulating layer formed on the wiring layer, a plurality of anode electrodes connected to the wiring layer through a plurality of through holes formed in the insulating layer, and collision of electrons formed on the anode electrode. In a fluorescent display tube provided with a plurality of light-emitting portions made of a fluorescent substance that emits light in a vacuum vessel, the hole diameter d1 of the through-hole and the distance d2 between the adjacent through-holes are d2 ≧ 2d1 and The relationship was set to 50 μm ≦ d1 ≦ 250 μm. As a result, in this fluorescent display tube, a flat area is formed on the insulating layer between the adjacent through holes. Therefore, even if the light emitting units are made finer and more highly integrated, contact between adjacent light emitting units is suppressed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a fluorescent display tube according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a conventional fluorescent display tube.

FIG. 3 is a cross-sectional view showing a configuration of a part of a conventional fluorescent display tube.

[Explanation of symbols]

101: glass substrate, 102: wiring layer, 103: insulating layer, 103a: through hole, 104: anode electrode (anode), 105: light emitting unit, 106: grid, 107
... filament, 108 ... spacer glass, 109 ... windshield, 110 ... frit glass.

Claims (1)

[Utility model registration claims] An electron emitting section for emitting electrons, a grid for controlling the flow of the emitted electrons, a wiring layer formed on a substrate constituting a part of a vacuum vessel, and An insulating layer formed, a plurality of anode electrodes connected to the wiring layer via a plurality of through holes formed in the insulating layer, and a fluorescent material formed on the anode electrode and emitting light upon collision of electrons. In a fluorescent display tube comprising a plurality of light-emitting portions configured in the vacuum vessel, a hole diameter d1 of the through hole and a distance d2 between adjacent through holes are d2 ≧ 2d1 and 50 μm ≦ d1 ≦ 250 μm.
A fluorescent display tube having a relationship of m.