WO2007029286A1

WO2007029286A1 - Display electrode film of light emitting thread array, method for producing same and light emitting thread array

Info

Publication number: WO2007029286A1
Application number: PCT/JP2005/016009
Authority: WO
Inventors: Yosuke Yamazaki; Hitoshi Hirakawa; Kouji Shinohe; Manabu Ishimoto; Kenji Awamoto
Original assignee: Shinoda Plasma Corporation
Priority date: 2005-09-01
Filing date: 2005-09-01
Publication date: 2007-03-15

Abstract

Light emitting threads each provided with a protective film and a phosphor layer on the inner wall of a transparent thin tube of glass, or the like, are arranged in a plurality of rows, a display electrode film (20) is provided on the front side of the light emitting thread and an address electrode film is provided on the back side thereof thus emitting light from the phosphor layer. In order to prevent disconnection of a display electrode (22) on the display electrode film (20), the display electrode (22) is partially provided with a thick portion (60). With such an arrangement, disconnection of the electrode due to bending of the electrode film or vibration caused upon application to the light emitting thread can be prevented.

Description

Specification

Display electrode film of light emitting yarn array, manufacturing method thereof, and light emitting yarn array

[0001] The present invention relates to a luminescent yarn array in which a discharge gas and a phosphor are enclosed, a large number of luminescent yarns having a tube structure with a discharge space are arranged, and electrodes are formed outside the luminescent yarns. Relates to an electrode film to be attached to the outside of the luminous yarn, a method for producing the electrode film, and a luminous yarn array.

Background art

In order to realize a large image display device that emits light by itself, it is possible to configure a display device by arranging a large number of glass tubes (hereinafter referred to as luminescent yarns) in which the principle of a plasma display is folded. JP-A-61-103187 is described in JP-A-11-162358.

[0003] Each light-emitting yarn has a circular, elliptical, or rectangular hollow shape in cross-sectional shape, and usually protects the glass surface used for the thin tube on the inner wall surface of such a thin tube with gas discharge power. An MgO layer as a protective film is formed, and a phosphor layer is provided on the MgO layer, and a discharge gas in which, for example, Ne and Xe gas are mixed is enclosed in the air. In order to construct a display device capable of displaying a color image by arranging a large number of light emitting yarns manufactured in this way, a pair of light emitting yarns emitting light of each of the three primary colors RGB is repeatedly arranged. A display electrode is provided on the front side which is the display side of the arranged light emitting yarns, and an address electrode is provided on the back side. The display electrode includes a transparent electrode formed on a transparent resin film in order to ensure the transparency of the emitted light, and a bus electrode using a metal such as copper as a conductor in order to ensure conductivity. Constructed by stacking! RU

[0004] Since the display device using the light emitting yarn array configured as described above can be configured by arranging a plurality of light emitting yarns, for example, a self-luminous display having a diagonal distance of 100 inches or more is realized. I can do it. In addition, since the luminescent yarn is a thin tube, and the MgO layer and the phosphor layer are formed inside the thin tube, it can be manufactured with a small-scale manufacturing facility, and thus can be manufactured at a low cost as a display device. As described above, the display device using the luminescent yarn has a characteristic not found in other display devices. When a large-area display device is created by arraying the luminescent yarns, Since electrode films with electrodes formed on the film must be placed on the front and back surfaces of the light-emitting yarn array, it is costly to produce a large-area electrode film and attach this electrode film to the light-emitting yarn array. There is a problem that the technique of attaching an electrode film to a large area with high accuracy and accuracy is required.

Patent Document 1: Japanese Patent Laid-Open No. 61-103187

Patent Document 2: Japanese Patent Laid-Open No. 11-162358

Disclosure of the invention

[0006] The present invention solves the above-mentioned problems, prevents the electrode from being disconnected or thinned when the electrode film is folded, and displays the display area as the display area increases. This is to solve the problem that the electrode film or electrode expands and contracts due to vibrations and temperature changes that occur in the electrode, and the electrode is easily broken.

[0007] In order to solve the problems of the prior art, it is not necessary to construct the electrode film of the light-emitting yarn array composed of the number of light-emitting yarns necessary for securing the desired display area on the front and back. A light emitting yarn array is formed by dividing a large number of light emitting yarns into a plurality of small blocks, and a small area electrode film corresponding to each of the light emitting yarn arrays divided into small blocks is attached to each light emitting yarn array. It is valid. In order to realize this configuration, it is necessary to fold the end portion of the display electrode film to the back side and connect the corresponding electrodes between adjacent electrode films. With this configuration, it is not necessary to use the large-area electrode film, which is a problem with the above-mentioned large-area light-emitting yarn array. In addition, the small-block light-emitting yarn array has a small area and emits light. It is also easier to attach an electrode film to the thread array.

[0008] Furthermore, as the display area increases, the electrode length increases and the electrodes are easily disconnected.

Further, when the electrode film is bent and used, the electrode is easily disconnected at the bent portion or thinned. In order to prevent such disconnection, the object of the present invention is to prevent the disconnection of the display electrode by partially thickening the bus electrode by the metal layer of the display electrode. It is to provide a possible electrode film.

That is, in the first aspect of the present invention, a protective film and a light-emitting layer are disposed in a transparent thin tube having a hollow portion, and a plurality of light-emitting yarns in which a discharge gas is sealed in the hollow portion. Opposite an address electrode film having an address electrode arranged on one surface side of the light emitting yarn arranged in a plane, and arranged on the other surface of the arranged light emitting yarn, the light emitting yarn partially emits light The display electrode film is provided with a display electrode, and the display electrode includes a bus electrode made of a metal layer, and the bus electrode is partially provided with a thick portion.

[0010] Furthermore, it is preferable that the end portion of the display electrode film has a bent portion that is bent in a direction facing the address electrode film side, and a thick portion is provided in a region including the bent portion. It is preferable to form the thick part with a stencil, which is preferably provided after the display electrode film is bent.

[0011] In addition to providing the thick portion at the portion where the display electrode film is bent, the mechanical strength of the display electrode is increased by providing the thick portion at the contact portion between the light emitting yarn and the display electrode or between adjacent light emitting yarns. It may be improved.

[0012] In a second aspect of the present invention, a protective film and a light emitting layer are arranged in a transparent thin tube having a hollow portion, and a plurality of light emitting yarns each having a discharge gas sealed in the hollow portion are formed into a planar shape. Opposite an address electrode film having an address electrode arranged on one side of the arranged light emitting yarns, arranged on the other surface of the arranged light emitting yarns, a display light for partially emitting the light emitting yarns. A display electrode film provided with an electrode, comprising: a step of forming a bus electrode made of a metal layer of the display electrode; and a thickening step of partially thickening the bus electrode The present invention relates to a method for producing an electrode film.

[0013] Further, in the thickening step, which preferably includes a step of bending the end portion of the display electrode film in a direction facing the address electrode film side, the bus electrode is thickened by plating. It is preferable that it is a process. The thickening step is preferably performed using a mask having an opening corresponding to a portion of the bus electrode that is partially thickened.

[0014] In the third aspect of the present invention, a protective film and a light emitting layer are disposed in a transparent thin tube having a hollow portion, and a plurality of light emitting yarns each having a discharge gas sealed in the hollow portion are planar. Arranged in A light emitting yarn, an address electrode film having an address electrode arranged on one side of the arranged light emitting yarn, and a metal layer arranged on the other surface of the arranged light emitting yarn facing the one surface And a display electrode film provided with a display electrode partially having a thick portion on a bus electrode made of the light emitting yarn array.

[0015] Furthermore, it is preferable that a plurality of the light emitting yarn arrays are provided, and display electrodes corresponding to each other between the light emitting yarn arrays are electrically connected to increase the area of the light emitting yarn array.

Brief Description of Drawings

FIG. 1 is a diagram showing an outline of a cross section of a main part of a light emitting yarn array.

FIG. 2 is a schematic view showing the main part of the display electrode film.

FIG. 3 is a view showing an outline of a light emitting yarn array in which a plurality of light emitting yarns are arranged and arranged.

FIG. 4 is a diagram showing an outline of a luminescent yarn array in which a plurality of luminescent yarn arrays shown in FIG. 3 are arranged.

[FIG. 5] FIG. 5 is a diagram showing an outline of a hollow luminescent yarn having a substantially rectangular cross-sectional shape and the vicinity of a bent portion of the display electrode film, which occurs in the display electrode when there is no thick portion. This is to explain the disconnection of the bus electrode.

FIG. 6 is a schematic view showing the vicinity of a thick portion provided in a bent portion in order to prevent the disconnection of the nose electrode shown in FIG. 5 from occurring.

FIG. 7 is a schematic diagram showing another example of the thick part provided on the bus electrode, and is a schematic diagram when the thick part is provided between the light emitting yarns.

[FIG. 8] FIG. 8 is a schematic view in the case where a thick portion is provided at a contact portion between the light emitting yarn and the bus electrode.

FIG. 9 is a diagram showing an example of a process sequence for partially thickening the bus electrodes on the display electrode film.

FIG. 10 is a schematic diagram showing a process of forming a bent portion at the end of the display electrode film.

[FIG. 11] FIG. 11 is a schematic view showing a measuring instrument for thickening the bus electrode in the vicinity of the bent part of the display electrode film provided with the bent part, and a display electrode film attached to the instrument. It is.

[FIG. 12] FIG. 12 shows the bus electrode in the vicinity of the bent portion of the display electrode film provided with the bent portion. It is a schematic diagram which shows the process of thickening by a thickness.

FIG. 13 is a view showing a connection state of the display electrode film, the power source, and the anode plate in order to make the vicinity of the bent portion visible.

FIG. 14 is a schematic view showing a state in which the display electrode film fixed to the wire-measuring device shown in FIG. 13 is immersed in the liquid solution.

[FIG. 15] FIG. 15 is a schematic view showing a state in which the display electrode film is thickened by force plating of the bent portion.

FIG. 16 is a schematic view showing a state in which the display electrode film is thickened by bending force plating.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described. In this embodiment, the shape of the luminescent yarn is mainly explained when the diameter is 1 mm and the diameter of the hollow portion is 0.8 mm. The shape of the luminescent yarn is not limited to a circle but may be an ellipse or a rectangle. The diameter is not limited to lmm!

[0018] FIG. 1 is a diagram showing a main part of the light emitting yarn array 10 of the present invention, and a display electrode film on the front side where light emitted from a plurality of light emitting yarns 24 (illustrated by arrows) is emitted. 20 and address electrode film 30 are arranged on the back side. The display electrode film 20 and the address electrode film 30 are each bonded to the luminescent yarn 24, and a transparent adhesive is used on the front side so that the luminescent light of each luminescent yarn force can easily pass through, preferably Epoxy resin and photo-curable resin are used.

The display electrode film 20 is provided with a base film 21 and a display electrode 22. The base film 21 uses a transparent film for facilitating the transmission of the light emitted from the light emitting yarn 24. In this embodiment, a polyethylene terephthalate (PET) film having a thickness of 120 m is used. The base film 21 is not limited to PET, and is soft because it can be easily bonded along the plane of the light-emitting yarn. The base film 21 is transparent and transparent, which is part of the display electrode formed on the base film 21 Film or NESA film) can be used. The thickness is not limited to 120 m. Details of the display electrode 22 will be described later. The address electrode 32 is formed on the base film 31 of the address electrode film 30, and the address electrode 32 having a width of 200 μm and a thickness of 20 μm is formed along the longitudinal direction of each light emitting yarn 24 by copper plating. In this way, it is formed at the lower part of the luminescent yarn. The address electrode 32 may be formed of a conductive paste by a printing method in addition to being formed by plating. Alternatively, the address electrode 3 having a desired shape may be formed by etching a metal layer such as a copper foil adhered to the base film. 2 may be used.

Next, the luminescent yarn 24 will be described. Each light emitting yarn uses a glass thin tube 27 with an outer diameter of lmm and a hollow diameter of 0.8 mm in this embodiment, and an approximately 0.5 m thick MgO film that also serves as a protective film on the hollow inner wall. 28 is formed, and a phosphor layer 29 corresponding to the emission color of the luminescent yarn is formed on the MgO film 28. The illustrated light emitting yarns are arranged so as to emit red, green and blue light from each of the light emitting yarns 24, for example.

Next, details of the display electrode film 20 will be described with reference to FIG. FIG. 2 shows the cross-sectional shape of the display electrode film 20 as viewed from the direction of arrow A in FIG. The display electrode film 20 includes a base film 21, a transparent electrode 50 formed of an ITO film or the like on the surface of the base film 21 facing the luminescent yarn 24, and a metal layer (for example, a copper layer) on the transparent electrode 50. , Silver, gold, or the like) and a display electrode 22 composed of a pair of sustain electrodes 54 laminated. In this embodiment, the pitch P of the pair of sustain electrodes 54 is 3 mm, the width W1 of the transparent electrode 50 is lmm, the bus electrode 52 is copper, the width W2 is 50 m, and the distance between the sustain electrodes 54 is S1 is 0.4 mm, so the distance S2 between the display electrodes 22 is 0.6 mm. The transparent electrode 50 has a thickness of about 0.3 μm, and the bus electrode 52 has a thickness of 10 μm. The width W2 of the bus electrode may be 50 μm to 100 μm and the thickness may be 10 μm to 20 μm.

A light emitting yarn array 10 in which a plurality of light emitting yarns 24 are arranged using such a display electrode film 20 will be described with reference to FIG. In the luminescent yarn array 10 of FIG. 3, the end 40 of the display electrode film 20 is bent in the direction toward the address electrode film 30. An address electrode film 30 is disposed between both end portions 40 of the display electrode film 20. In the arrangement of the light emitting yarns 24, three light emitting yarns 24 each emitting a light emission color of RGB (red, green, blue) are repeatedly arranged. The number of luminescent yarns in the luminescent yarn array 10 can be made arbitrarily. In consideration of consistency with the electrical circuit, a width of 2 such as 64, 128, 256, 512, etc. is preferable, but a light emitting yarn array is composed of multiples of 3 with 3 RGB pairs. May be.

Next, with reference to FIG. 4, a case where a plurality of the light emitting yarn arrays shown in FIG. 3 are arranged is shown. Each light emitting yarn array 10 is arranged so that the corresponding display electrodes 22 of each light emitting yarn array 10 are arranged in a row, and the corresponding display electrodes 22 are electrically connected between the ends of the adjacent light emitting yarn arrays 10. It is connected to the.

The luminescent yarn 24 and the like shown in FIGS. 1, 3, and 4 are thin tubes having a circular cross-sectional shape, but the present invention is not limited to this shape, and luminescent yarns having other cross-sectional shapes may be used. FIG. 5 shows an example in which the luminescent yarn 42 having a rectangular cross-sectional shape is arranged at the end 40 of the display electrode film 20. The glass thin tube 44 of the luminescent yarn 42 having a rectangular cross-sectional shape is formed by forming a glass thin tube force with a circular cross-sectional shape into a rectangular shape, and an MgO film 28 as a protective film is formed on the inner wall of the hollow portion. The phosphor layer 29 is formed on the boat 46 slightly shorter than the length of the glass thin tube 44 in the longitudinal direction, and is disposed in the glass thin tube 44.

[0026] As shown in FIG. 5, the display electrode film 20 is formed by bending the display electrode 22 on the base film 21 to form the bent end portion 40. Therefore, the display electrode film 20 is formed at the corner portion of the bent portion. The broken portion 48 is likely to occur in the display electrode 22. FIG. 6 shows an example in which a thick portion 60 is provided on the display electrode 22 in order to repair or prevent the broken portion 48. In FIG. 6, the length L1 in the direction along the end 40 of the thick portion 60 is about 1 mm in the present embodiment, and the length L2 in the orthogonal direction is about 0.1 mm. The length of L1 may be 1 mm or more, but the length of L2 is preferably about 0.1 mm because it will interfere with the light-emitting yarn 24 as it becomes longer.

[0027] Other examples of the thick portion provided on the display electrode 22 are shown in FIGS. FIG. 7 shows an example in which the thick portion 62 is provided on the display electrode 22 so that the thick portion 62 is positioned between the light emitting yarns 24, and FIG. 8 shows the thickness at the contact position between the display electrode 22 and the light emitting yarn 24. An example in which a meat part 64 is provided is shown.

[0028] The force shown in the example in which the thick portions 60, 62, 64 are provided on the display electrode 22. The process of forming the thick portions will be described below. FIG. 9 is a diagram showing a process sequence showing a case where a bending force is applied to the display electrode film 20 to form a thick portion at the bent portion.

[0029] In step 70, the end portion of the display electrode film 20 is folded at a desired position with a desired bending curvature and bending angle using a bending tool. Then go to step 72 Attach the display electrode film 20 to a measuring instrument that has an opening corresponding to the position of the thick wall! Then, in step 74, the display film 20 and the DC power source, anode plate, etc. used for the plating are connected, and in this state, the display electrode film 20 fixed to the plating instrument is immersed in the plating solution in step 76. In step 78, the DC power supply is connected to perform the measurement.In step 80, the display electrode film 20 and the like are taken out of the solution, and the display electrode film 20 that has been removed from the device is washed with pure water to wash the solution. After pouring and drying, the electrode thickening process is completed (step 82).

Next, the above steps will be described in detail with reference to FIGS. 10 to 16. FIG. 10 is a diagram illustrating a process of sandwiching the display electrode film 20 between the male mold 90 and the female mold 92 and bending the display electrode film 20 into the display electrode film 20. The female mold 92 may be made of metal, but the male mold presses a relatively soft bus electrode or the like and comes into contact with the display electrode film 20, so that the contact surface of the male mold 90 is coated with grease. I like it! /

Next, referring to FIG. 11, a description will be given of a measuring instrument for marking the thick portion at the bent portion of the display electrode film 20 that has been bent. The measuring instrument is composed of a supporting part 100, a mask part 102 provided with a measuring electrode for energizing the display electrode 22, and a connecting member 104 for connecting the mask part. In FIG. 11, in order to illustrate the essential parts of the measuring instrument in a concise manner, a fixing means for connecting the support part 100 and the mask part 102, a measuring electrode provided in the mask part 102, its terminals, etc. Is not shown.

Next, FIGS. 12 and 13 show cross-sectional views of the measuring instrument and the display electrode film 20 when viewed in the direction indicated by the arrow B in FIG. The mask portion 102 is provided with a measuring electrode 106 for electrically connecting the bus electrode 52 of the display electrode 22 and the negative electrode side of the DC power supply 110 (FIG. 13) as shown! . A connecting terminal 108 is connected to the measuring electrode 106, and the measuring electrode 106 and the DC power source 110 are connected via the connecting terminal 108. An anode plate 112 is connected to the anode side of the DC power supply 110 (FIG. 13).

[0033] The display electrode film 20 and the measuring instrument are electrically connected as shown in FIG. 13, and then immersed in a measuring solution as shown in FIG. The plating solution used in this embodiment is a solution of copper sulfate or copper pyrophosphate, and the mixing ratio of water and copper sulfate or copper pyrophosphate and sulfuric acid is 100: 50: 8. [0034] In this manner, the display electrode film 20 is immersed in a plating solution, and a current having a current density of 1 to 5 AZdm ² is supplied from the DC power supply 110 in a state where the plating solution is maintained at 25 ° C to 40 ° C. The plating layer is deposited for about 15 minutes to form a thick part 60 of about 20 / zm (see Figure 15). Note that the plating liquid level is set to be lower than one mask portion 102 so that copper is not deposited on the transparent electrode such as the ITO film as much as possible.

[0035] After the display electrode film 20 with the thick part formed is taken out of the plating solution and the plating device force is removed, the plating solution remaining on the display electrode film 20 is washed with pure water, rinsed and dried. Thus, the display electrode film 20 in which the thick portion 60 is formed on the bus electrode of the bent portion 40 shown in FIG. 16 is completed.

In the above description, the description has been made mainly for providing the thick portion on the bus electrode 52 of the display electrode film 20, but the present invention provides a partial thick wall for the address electrode of the address electrode film 30. It can also be applied to provide a portion. Furthermore, in the above description, the case where the light emitted from the light emitting yarn 24 emits the three primary colors of RGB has been described, but a configuration of emitting one color or two colors may be used.

Industrial applicability

[0037] A structure of a light-emitting yarn array in which a plurality of light-emitting yarns each having a phosphor layer arranged inside a glass thin tube or the like are arranged, and an electrode film provided with electrodes is attached to both surfaces of the arranged light-emitting yarns. Since the thick part can be formed on the metal electrode provided on the film, it is possible to prevent the electrode film from being disconnected due to bending of the electrode film or vibration generated when applied to the light emitting yarn.

[0038] 10 Luminescent yarn array

20 Display electrode film

21 Base film

22 Display electrode

24 Luminous thread

27 Glass capillary

30 Address electrode film Address electrode edge

Bus electrode 62, 64 Thick part

Claims

The scope of the claims

[1] One surface side of a luminescent yarn in which a protective film and a luminescent layer are arranged in a transparent thin tube having a hollow portion, and a plurality of luminescent yarns sealed with a discharge gas are arranged in a plane in the hollow portion A display electrode provided with a display electrode that is opposed to an address electrode film having an address electrode disposed on the other side and is disposed on the other surface of the arranged light-emitting yarns to partially emit light from the light-emitting yarns A film,

The display electrode has a bus electrode made of a metal layer,

A display electrode film, wherein the nose electrode is partially provided with a thick portion.

[2] The display electrode film has a bent portion in which an end portion of the display electrode film is bent in the direction of the force toward the address electrode film, and the thick portion is provided in a region including the bent portion. The display electrode film according to claim 1, wherein

[3] The display electrode film according to claim 2, wherein the thick part is formed after the bent part is bent.

[4] A display electrode film, characterized in that the thick part according to any one of claims 1 to 3 is formed by plating.

[5] One surface side of a luminescent yarn in which a protective film and a luminescent layer are arranged in a transparent thin tube having a hollow portion, and a plurality of luminescent yarns sealed with discharge gas are arranged in a plane in the hollow portion A display electrode provided with a display electrode that is opposed to an address electrode film having an address electrode disposed on the other side and is disposed on the other surface of the arranged light-emitting yarns to partially emit light from the light-emitting yarns A method for producing a film,

Forming a bus electrode made of a metal layer of the display electrode;

A method of manufacturing a display electrode film, comprising: a thickening step of partially thickening the bus electrode.

6. The method for producing a display electrode film according to claim 5, further comprising a step of bending the display electrode film in a direction in which an end portion of the display electrode film is directed toward the address electrode film side.

7. The method for manufacturing a display electrode film according to claim 5, wherein the thickening step is a step of thickening the bus electrode by plating.

[8] The thickening step is characterized in that the thickening is performed using a mask having an opening corresponding to the portion of the bus electrode to be partially thickened. Item 7! A method for producing a display electrode film according to any one of the deviations.

[9] A light emitting yarn in which a protective film and a light emitting layer are disposed in a transparent thin tube having a hollow portion, and a plurality of light emitting yarns in which discharge gas is sealed in the hollow portion are arranged in a plane,

An address electrode film provided with an address electrode disposed on one side of the arranged luminous yarns;

A display electrode film provided with a display electrode disposed on the other surface of the arrayed light-emitting yarns facing the one surface and partially having a thick portion on a bus electrode made of a metal layer. Luminescent yarn array characterized by.

[10] A luminescent yarn array comprising a plurality of the luminescent yarn arrays according to claim 9, wherein the display electrodes corresponding to each other between the luminescent yarn arrays are electrically connected.