TW521296B - Fluorescent display device - Google Patents

Abstract

The present invention provides a fluorescent display tube without containing Pb which is a restricted material. In the fluorescent display tube of the present invention, an enclosure 6 is constituted of sealing an anode board 2, a front board 3 and a side plate 4 by a sealant 5. Insulating layers 10 with a two-layer structure comprising an anode wiring conductor 7 and insulating layer 8, 9 are laminated one by one on an inner surface of the anode board 2. An anode conductor 11 on the insulating layer is connected to the wiring conductor 7 via a through-hole 12 and a conductive material 13. A phosphor layer 14 is disposed on the anode conductor 11 to form an anode 15. A control electrode 16 and a cathode 17 are provided in its upper part. The insulating layer 9 and the sealant 5 of upper layers are formed by PbO and nonleaded glass which does not even contain pigment. Leaded glass containing black pigment is used for the insulating layer 8 of a lower layer. Bismuth-based nonleaded glass with a softening point of 520-530 DEG C is used for the nonleaded glass for the insulating layer 9. Phosphoric acid-based nonleaded glass with a softening point of 340-370 DEG C is used for the nonleaded glass for the sealant 5. Thereby, the cathode and the phosphor can be prevented from being deteriorated by reduced Pb, and a service life of a fluorescent display tube is improved.

Description

521296 ---___ Case No. 88103561_9 (January) _Amended_ V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to the use of lead-free (Pb〇) -free glass as a package Materials and insulating layer materials. [Previous technology] Figure 3 is a cross-sectional view of a conventional fluorescent display tube 1000. Insulating anode substrates such as glass and front substrates 010 and front substrates 丨〇2 and side panel 1 〇03 are box-shaped peripherals 105 assembled by the packaging material 104. Inside the anode substrate 101 in the peripherals 105, an anode wiring 1 is formed by an A1 film or the like. 6. An insulating layer 107 is provided on the upper surface, and an anode conductor 108 is provided on the insulating layer 107 in a predetermined circuit pattern. The anode conductor 108 and the conductor 106 are formed on the insulating layer 1. The main part of 0 7 is connected with a through hole 1 0 9 filled with a conductive material 1 1 0. A phosphor layer 丨 丨 is formed on the anode body 108, and an anode 112 for a light-emitting display portion is formed. In the peripheral device 10 In 5, the control electrode 113 is provided above the anode 112, and above the control electrode 113 There is a filament-shaped cathode 11 4 provided with an electron source. The light-emitting display of the anode 11 2 is viewed through the front substrate 102. The aforementioned insulating layer 107 is in addition to the anode conductor 108 and the wiring conductor 106. In addition to the insulation and protection functions, it also has the function of shielding the light from the anode substrate 丨 outside and preventing the reflection of the light from the front substrate of the front side of the substrate. In the display tube, the foregoing insulating layer and packaging material are composed of lead glass mainly composed of PbO ′ Β2 03 ′ ΑΙΑ3. The foregoing lead glass mainly composed of pb0 or the like is used as the insulating layer of the fluorescent display tube and The reason for the packaging material is that its melting point is low. In the manufacturing process of the fluorescent display tube, it can be melted at a low temperature without oxidizing the phosphor and the metal parts constituting the material.

310471.ptc Page 5 521296 _Case No. 88103561 Xi (year f) Modification_Fifth, the description of the invention (2) The relationship. The glass that constitutes the insulation layer contains CuO as described above for the purpose of improving the contrast. Metal oxides such as Cu20, A120, BA, Fe 20 3, Cr 20 3, T i 02 are mostly used as color pigments. This is because a light-emitting display portion is formed on the insulating layer, and the insulating layer will affect the display. The relationship between visibility is to be used as the improvement of the predetermined color for comparison. An example of the composition of the wrong glass used in the past is described below. (1) Black insulating glass paste for forming a black insulating layer. The The black insulating glass paste is, as in the aforementioned fluorescent display tube, in a direct-view type fluorescent display tube (referred to as a VFD) that emits light when the anode 11 2 on the anode substrate 100 is viewed through the front substrate 102. The foregoing insulating layer 107 is formed on the anode substrate 101 and the user. Composition: 76% by weight of powder glass, 5% by weight of black pigment, and 19% by weight of excipient. Powder glass has a softening point of 5 2 0 to 5 3 0 ° C lead borate powder glass (PbO, B203, Si02) The black pigment is a Cu-based metal oxide. The excipient is an organic solvent such as 5 to 7 wt% of ethane-based cellulose mixed with alcohols. (2) A white insulating glass paste for forming a white insulating layer. The white insulating glass paste can be used for both the direct-view type fluorescent display tube and the fluorescent display tube of different types. The front surface of the substrate is provided with a mesh-shaped aluminum film anode conductor before the light-transmitting surface. As a light-transmitting wiring conductor. The wiring conductor is also a thin film. An anode layer is provided on the anode conductor as the anode. The control electrode has the same structure as the cathode. The light-emitting system of the phosphor layer transmits the anode with light transmission Conductors and translucent front substrates viewed from the outside of the front substrate.

310471.ptc Page 6 521296 Case No. 88103561 V. Description of the invention (3) It is called the front-emitting fluorescent display tube (FLVFD). White insulating glass paste is mainly used in FLVFD to cover the aforementioned wiring conductors and is provided on the inner surface of the front substrate, so that it is not easy to see the wiring conductors of the aluminum film with high reflectance and improve the display contrast for users. Composition: 75% by weight of powder glass, 5% by weight of white pigment, and 20% by weight of vehicle. The powder glass is a lead boric acid-based powder glass (PbO, B203, SiO2) having a softening point of 520 to 530 ° C. The white pigment is a Ti-based metal oxide. The carrier is a mixture of 5 to 7 wt% of ethane-based cellulose with an organic solvent such as an alcohol. (3) Black sealing glass paste for forming black packaging materials. The black male and the sealing glass are used for hermetically joining the packaging parts of the peripheral devices of the aforementioned 7G tubes. Because air tightness is very important, compared with the materials of (1) (2) mentioned above, the glass has more components. Composition: 88.5 wt% powder glass, 1.5 wt% black pigment, 10 wt% carrier. The powder glass is a lead boric acid powder glass (PbO'Bβ3'SiOD) with a softening point of 5 2 to 5 3 0 ° C. The black pigment is a fluorene-based metal oxide. The carrier is an organic solvent such as 5 to 7 wt% of ethane-based cellulose mixed with alcohols. [The problem to be solved by the invention] is the benchmark. Therefore, the quality is appropriate. In order to prevent environmental pollution, C (i, Pb, etc.) are strictly restricted, and when the above substances are used in industrial products, it is necessary to ensure that they are harmless after being discarded. For example, 13401001 etc. The specifications also have regulations. In order to prevent environmental pollution, there are strict standards. Therefore, from the ancestors, from the time of publication of bamboo and packaging methods, you should not contain as much as possible from the material stage.> Stone mu im; 0471 .ptc ~ ~~ ^^ * 7 521296 _ Case No. 88103561 ^ (year & month > Revision_ 5) Description of the invention (4) In the conventional fluorescent display tube, the metal contained in the insulating layer was oxidized Substances are generated during the manufacture of fluorescent display tubes due to the burning residue of the carrier. When the carbon is reduced, or it is reduced due to reduction and firing, and the reduced metal is diffused in the fluorescent display tube due to electronic impact during driving. When the reduced metal is attached to the surface of the cathode and the phosphor It will significantly shorten the life of the fluorescent display tube and change the luminous color of the fluorescent body. In the conventional fluorescent display tube, the PbO contained in the glass constituting the insulating layer is the same as the aforementioned metal oxide. It is well known that the reduced Pb is attached to the cathode and deteriorates the function of emitting electrons. The present invention is to provide a fluorescent display tube using a glass containing no PbO as the main purpose; [The means to solve the problem] The fluorescent display tube 1 described in item 1 of the scope of patent application is a box-shaped periphery assembled with a packaging material 5 A fluorescent display tube having an insulating layer 10 that insulates the anode wiring 7 and the anode conductor 11 from the inner surface of the peripheral device is characterized in that the sealing material and the insulating layer are The glass of lead oxide is the main branch. The fluorescent display tube described in item 2 of the patent application scope is that in the fluorescent display tube described in item 1 of the patent application scope, the aforementioned insulating layer is made of glass without lead oxide. The fluorescent display tube described in item 3 of the scope of patent application is the fluorescent display tube described in item 1 of the scope of patent application, wherein the insulating layer 10 is a metal containing the anode wiring 7 above. Layer 1 of oxide pigments

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^^^ 810356! V. Description of the invention (5) 8, and it is located on the first layer above, and the first layer 9 is the characteristic. [Second Embodiment of the Invention] The first figure is a cross-sectional view of Xu 1 (VFD) of the present invention. An example is a fluorescent display tube substrate 2 and a light-transmissive material 5 and an insulating male peripheral 6 made of glass or the like. Inside the peripheral device 6, the earth plate 3 and the side plate 4 are formed in a box shape, and an anode wiring 7 is formed. The inner surface of the substrate 2 is covered with an insulating layer 10 made of an aluminum thin film or the like. / \ The surface is provided with a double-layered pattern formed by the insulating layers 8,9, and the anode conductor layer 9 is provided on top of the anode layer 9 with a predetermined circuit; the body 11 and the wiring conductor 7 are , Borrow it. Anode conductor 1ΐΐ: A conductive material 13 filled with the bayonet hole 12 is connected to the upper surface. A phosphor layer 14 is formed on the top of the conductive material 13 and an anode 15 is formed as a display portion. In the peripheral device 6, a control electrode 16 is provided above the anode 15 and a filament-shaped cathode 17 is provided above the control circuit 6 in the form of an electron source. The light-emitting display of the anode 15 is visible through the front substrate 3, and the insulating layer of the double-layered structure described above will be described below. At least the upper insulating layer 9 is formed of glass containing no Pb0 and no pigment. The lower insulating layer 8 in this example is a conventional glass material containing a black pigment as described in (1). The composition of the lead-free glass in this example is 80% by weight of powder glass and 20% by weight of carrier. The powder glass is a bismuth-based glass (Bi203, ZnO, Si02-based glass) having a softening point of 520 to 530 degrees C. The carrier is one using an organic solvent such as 5 to 7% by weight of ethanecellulose mixed with alcohol. The encapsulation material 5 is described below. Fluorescent display tube 1 of this example

310471.ptc Page 9 521296 Case No. 88103561 January, 2011 Rev.-V. Description of the invention (6) The encapsulation material 5 uses the following glass that does not contain pb0. The composition of the glass containing no oxidation fault in this example is that powdered glass is 80 wt% '20% by weight of the carrier. The powder glass is a phosphoric acid-based glass (p205, Sn0-based glass) using a softening point of 340 to 370 ° C. As the carrier, an organic solvent such as 3 to 5 wt% of ethyl cellulose is mixed with an alcohol. The effect of this example is described below with reference to FIG. 2. Fig. 2 compares the emitters of the cathodes in the fluorescent display tube shown on the vertical axis according to the types of insulation layers listed on the horizontal axis. The emission in the fluorescent display tube using the insulating layer of this example made of lead-free-free glass without colored pigments was 100% (indicated by "the present invention"). The emission in a conventional fluorescent display tube in which a conventional insulating layer (white insulating glass paste) was added to lead glass was 892 (expressed in the past). Also, in a conventional fluorescent display tube in which a conventional insulating layer (black insulating glass paste) of CuCri oxide was added to lead glass, the emission was 56.8% (indicated by (B)). In this embodiment, in order to improve the light-shielding contrast relationship, colored insulation is required. Therefore, the insulating layer has a double-layer structure and the lower layer uses conventional glass materials. Only the upper layer is glass without lead oxide. However, when it is not necessary to color the insulating layer, it may be configured as a single-layer structure, and the entire structure may be made of glass containing no lead oxide. According to this example, 'the lead-free glass is used at least on the surface layer of the insulating layer' The pigment containing metal oxides and the underlying insulating layer of lead glass do not appear, and the surface does not directly impact electrons. Therefore, the adverse effects of gold, oxygen, substances, and oxidation errors will not be reduced in the future to contaminate the cathode and phosphor of the display tube. Therefore, it is possible to prevent deterioration of the phosphor, color deviation, reduction in cathode electron emission capability, etc., and to improve the life of the fluorescent display tube.

Page 10 521296 _ Case No. 88103561 β (Amended on May 5th of the year _ 5) Description of the invention (7) [Effect of the invention] According to the present invention, the insulating layer and the packaging material of the fluorescent display tube are free of lead oxide. The relationship between glass can realize the fluorescent display tube that does not use restricted substance Pb. Therefore, it can prevent Pb from flowing out to the environment. Moreover, the relationship that PbO is not contained in the insulating glass can prevent the cathode and phosphor from being reduced Deterioration of Pb can improve the life of the fluorescent display tube. In addition, because the insulating layer does not contain a coloring material of metal oxide, it can prevent the cathode and the phosphor from being reduced by these metals, and the unevenness on the surface of the insulating layer Small, can reduce the amount of oxygen absorption and improve the vacuum in the peripheral.

310471.ptc Page 11 521296 _Case No. 88103561 Xi (Year? Month 3 Modification _ Brief Description of Drawings [Simplified Description of Drawings] Figure 1 is a sectional view showing an example of an embodiment of the present invention. Figure 2 is A graph showing the effect of an example of the embodiment of the present invention compared with the conventional example. Figure 3 is a cross-sectional view showing an example of a conventional fluorescent display tube. [Explanation of the drawing number] 1 The fluorescent display tube 2 is used as a plate Anode substrate 3 as the front plate of the board 4 Side panel as the board 6 Peripherals 7 Anode wiring 8 Insulating layer 1 First layer 9 Insulating layer 2 Second layer 10 Insulating layer 11 Anode conductor 15 Anode (P-1)

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Claims (1)

521296 Amendment_Case No. 88103561 6. Scope of patent application 1. A fluorescent display tube is a box-shaped peripheral device assembled with packaging materials. An anode wiring and an anode conductor are formed on the inner surface of the peripheral device. The fluorescent display tube with an insulating layer is characterized in that the packaging material and the insulating layer are mainly made of glass containing no lead oxide. 2. For example, the fluorescent display tube of the scope of patent application, wherein the aforementioned insulating layer is made of glass containing no oxidation error. 3. For example, the fluorescent display tube of the first scope of the patent application, wherein the aforementioned insulating layer is a first layer comprising a pigment made of a metal oxide provided on the aforementioned anode wiring, and provided on the aforementioned first layer The second layer is made of glass containing lead oxide only. 310471.ptc Page 13 Light of the Yin Pole Figure 2 Type of insulation layer (correction)