KR100395282B1 - Transfer foil, flat-type cathode-ray tube and method thereof - Google Patents

Abstract

A reflective flat cathode ray tube and a method of manufacturing the same are provided for improving the quality of a display image.

The flat cathode ray tube is formed by sequentially forming an electrode layer, a reflective layer and a phosphor layer on the inner surface of the screen panel. It is preferable to form a reflection layer inside the periphery of a phosphor layer.

On the transfer substrate 22, a transfer foil 21 formed of at least a phosphor layer 14, a reflective layer 13, and an electrode layer 12 is prepared, and the electrode layer side of the transfer foil 21 is formed by a screen panel ( The inner surface of 3) is heated, pressurized, and adhered to each other, and the transfer substrate 22 is peeled off to transfer the fluorescent surface 6 composed of the phosphor layer 14, the reflective layer 13, and the electrode layer 12.

Description

Transfer foil, flat cathode ray tube and manufacturing method thereof {TRANSFER FOIL, FLAT-TYPE CATHODE-RAY TUBE AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cathode ray tube and a method of manufacturing the same, which illuminate image information as the phosphor layer emits light by an electron beam.

TECHNICAL FIELD This invention relates to the transfer foil used for preparation of the fluorescent surface of a flat cathode ray tube.

Reflective or transmissive flat cathode ray tubes are known. Reflective flat cathode ray tubes, for example, are known to have low manufacturing costs and good image quality. In this type of flat cathode ray tube, a fluorescent surface is formed on the inner surface of the screen panel provided at a position opposite to the front panel. The fluorescent surface is formed by forming a phosphor layer on the reflective layer. As another fluorescent surface, a transparent electrode (ITO film), a reflective layer (TiO ₂ film), and a phosphor layer are also formed in this order.

As an example of a method for producing a fluorescent surface of such a flat cathode ray tube, a reflective layer (TiO) is formed when forming a fluorescent surface formed by forming a transparent electrode layer (ITO film), a reflective layer (TiO ₂ film), and a phosphor layer in the above order on the inner surface of the screen panel. ₂ film) and a phosphor layer are formed by a transfer method, and a manufacturing method of forming a transparent electrode layer (ITO film) by a coating method is known (see Japanese Patent Application Laid-Open No. 11-96948).

In addition, as another example of a method for producing a fluorescent surface of a flat cathode ray tube, a phosphor layer and, for example, an aluminum film serving as a reflective layer are formed on a PET (polyethylene telephthalate) film, and then a fluorescent surface composed of the phosphor layer and the reflective layer is formed. There is a method of transferring onto an inner surface of a screen panel through a peeling process. Here, the phosphor layer is formed by screen printing, and the aluminum film is formed by screen printing or depositing an aluminum paste. By using such a transfer process, a fluorescent surface can be manufactured by a small apparatus, and a manufacturing process can be simplified.

In the conventional transfer method, a transfer foil formed by laminating a release layer, a phosphor layer, a reflective layer, and an adhesive layer on a transfer film such as PET is prepared. Then, the transfer foil is bonded to a predetermined position on the screen panel inner surface by the adhesive layer. Thereafter, the transfer film is peeled off, and the peeling layer is vaporized and removed at a higher temperature. Through such a transfer process, a fluorescent surface may be formed on the inner surface of the screen panel.

By the way, the above-mentioned fluorescent surface preparation method of the former had the following problems. First, the manufacturing apparatus is enlarged because the transfer process and the application process are separate. Secondly, there is a possibility that the resistance of the transparent electrode layer (ITO film) may fluctuate due to the uneven coating, and when the coating thickness is uniformly applied to prevent it, if the coating thickness is thick, it becomes white and transparent due to the influence of moisture. There is a drawback that there is no defect, and that a thin coating thickness results in a high resistance and insufficient conduction. For this reason, when the application | coating thickness is made to some extent, management problems remain, for example, it is necessary to dry immediately after application | coating.

In addition, the transfer foil used for formation of a fluorescent surface in the latter fluorescent surface production method is usually produced by sequentially forming the reflective layer and the phosphor layer in the same pattern. However, when each layer is formed by screen printing, for example, there is a concern that the reflective layer on the phosphor layer is stretched at the peripheral portion and is greatly widened than the phosphor layer. When a fluorescent surface is formed on the inner surface of the cathode ray tube panel using such a transfer foil, as the reflective layer becomes wider than the phosphor layer, the surroundings of the reflective layer are strongly reflected when the image is displayed, or the color of the reflective layer appears in a frame shape, There is a fear that the display quality of the tube is significantly reduced. In addition, it is necessary to manage the manufacturing process of the transfer foil, and work efficiency falls.

When the fluorescent layer is formed by a transfer method using a transfer foil formed by screen printing an aluminum paste made of aluminum particles and a binder, for example, only a reflective layer having a poor reflection efficiency can be obtained. In the case of using a transfer foil having a reflective layer formed of an aluminum vapor deposition film, the reflection efficiency is excellent, but when the adhesive layer vaporizes in the post-transfer heat treatment process, the gas is blocked by the aluminum vapor deposition film, and as a result, the aluminum vapor deposition film expands and ruptures. This occurs.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a flat cathode ray tube and a method of manufacturing the same, which ensure uniformity of each film quality of the fluorescent screen, improve display quality, and shorten the fluorescent screen manufacturing process by batch transfer. To provide.

SUMMARY OF THE INVENTION The present invention provides a flat cathode ray tube and a method of manufacturing the same, which have a good reflection efficiency on a fluorescent surface, are easy to manufacture, and have good visibility of display images, that is, display quality.

This invention provides the transfer foil suitable for manufacture of a flat cathode ray tube, especially the manufacture of the fluorescent surface.

1 is a block diagram showing an embodiment of a reflective flat cathode ray tube according to the present invention.

2A is a front view of the screen panel of the flat cathode ray tube of FIG.

FIG. 2B is a bottom view of the screen panel of the flat cathode ray tube of FIG. 1. FIG.

2C is a right side view of the screen panel of the flat cathode ray tube of FIG.

Figure 3 is a block diagram showing another embodiment of the transmissive flat cathode ray tube according to the present invention.

Figure 4 A is a front view showing an embodiment of a sheet type transfer foil according to the present invention.

4B is a cross-sectional view of the transfer foil of A of FIG. 4.

5A to 5D are manufacturing process diagrams showing a fluorescent surface manufacturing method according to the present invention made using the transfer foil of FIG. 4.

Figure 6 A is a front view showing another embodiment of a sheet type transfer foil according to the present invention.

6B is a cross-sectional view of the transfer foil of A of FIG. 6.

7A to 7D are manufacturing process diagrams showing a fluorescent surface producing method according to the present invention, which is made using the transfer foil of FIG. 6.

8 is a block diagram showing another embodiment of the roll-type transfer foil according to the present invention.

9 is a schematic structural diagram showing an embodiment of a transfer apparatus according to the present invention;

FIG. 10 is a sectional view of a main part seen from the front of FIG. 9; FIG.

Fig. 11A is a side view showing one embodiment of the heat transfer roller of the transfer device.

Fig. 11B is a side view showing another embodiment of the heat transfer roller of the transfer device.

12 is an explanatory diagram of rotation position detecting means of a heat transfer roller of a transfer apparatus;

13: A is sectional drawing which shows an example of attachment of the screen panel to the work support base in the transfer apparatus.

13B is a cross-sectional view showing another example of mounting of the screen panel on the work support base in the transfer device.

14 is a first operation process chart of the transfer device of FIG. 8;

15 is a second operation process chart of the transfer device of FIG. 9;

16 is a third operation process chart of the transfer device of FIG. 9;

17 is a fourth operational process diagram of the transfer device of FIG. 9;

18 is an enlarged view of a heat transfer roller and a screen panel in the transfer apparatus.

19 is an explanatory diagram of the operation of the transfer apparatus of FIG. 9;

20 is a schematic configuration diagram of a main part showing another embodiment of the transfer apparatus according to the present invention together with a first operation flowchart.

21 is a second operation process chart of the transfer device of FIG. 20;

22 is a third operation process chart of the transfer device of FIG. 20;

FIG. 23 is a fourth operation process chart of the transfer device of FIG. 20;

<Explanation of symbols for the main parts of the drawings>

1, 18: flat cathode ray tube

2: front panel

3: screen panel

4: perimeter

5: glass tube

6, 17: fluorescent surface

7: electron gun

8a, 8b: glass frit joint

10: skirt section

12, 32: electrode layer

13: reflective layer

14: phosphor layer

16: conductive film

19: reflective layer

21, 31: single-sheet transfer foil

22: transfer film

23: release layer

24: adhesive layer

41: roll-type transfer foil

43: transfer foil element

50: pressurizing means

51: sheet type transfer device

52: work support

53: heat transfer roller

54: main cylinder

55: pressure control cylinder

57: drive motor

58: mounting surface

59: XY table

60: support

61: horizontal drive shaft

62: incision

64: heating heater means

66: heater cover

68: fixed substrate

69: movable member

70, 71: connecting member

74: detection plate

75: slit

78: photoelectric sensor

76: light emitting element

77: light receiving element

79: detection device

81: supply reel

82: reel reel

83: transfer foil pressurizing guide means

84: transfer foil pressurizing means

90: sheet type transfer foil

91: roll-type transfer foil

100: roll type transfer device

The transfer foil according to the present invention is formed by laminating at least a phosphor layer, a reflective layer, and an electrode layer on a transfer substrate.

It is preferable to form a reflection layer inside rather than the periphery of a phosphor layer.

In the transfer foil of the present invention, since at least a phosphor layer, a reflective layer, and an electrode layer are formed on the transfer substrate, the phosphor surface can be formed by batch transfer, and the uniformity of the film quality of the phosphor surface can be ensured.

When the reflective layer is formed inside the periphery of the phosphor layer, the reflective layer does not protrude from the phosphor layer when transferred to the panel. When each layer is sequentially formed, for example, by printing on the transfer substrate, the reflective layer does not extend greatly from the periphery of the phosphor layer.

The transfer foil according to the present invention is formed by laminating at least a phosphor layer and a reflecting layer imparting conductivity on a transfer substrate.

It is preferable to form a reflection layer inside rather than the periphery of a phosphor layer.

In the transfer foil of the present invention, since at least a phosphor layer and a reflecting layer imparting conductivity are formed on the transfer substrate, it is possible to form a fluorescent surface according to batch transfer, and to ensure uniformity of each film quality of the fluorescent surface.

Since the reflective layer also serves as the electrode layer, the electrode layer is omitted, thereby simplifying the film structure of the transfer foil.

When the reflective layer is formed inside the periphery of the phosphor layer, the reflective layer does not protrude from the phosphor layer when transferred to the panel. For example, when each layer is printed and sequentially formed on the transfer substrate, the reflective layer does not stretch greatly around the phosphor layer.

The flat cathode ray tube according to the present invention is formed by laminating an electrode layer, a reflective layer and a phosphor layer in accordance with transfer from a transfer tube on an inner surface of a panel.

It is preferable to form a reflection layer inside rather than the periphery of a phosphor layer.

In the flat cathode ray tube of the present invention, since the fluorescent surface is formed of the electrode layer, the reflective layer, and the phosphor layer by transfer from the transfer foil, uniformity is ensured in the film quality of each layer, and the image display quality is improved.

When the reflective layer constituting the fluorescent surface is formed inside the periphery of the phosphor layer, the reflective layer protrudes so as not to display unnecessary frames around the image. Therefore, the image display is not bad and the display quality is stabilized.

The flat cathode ray tube according to the present invention is formed by laminating a reflective layer and a phosphor layer on the inner surface of the panel which impart conductivity according to transfer from a transfer foil.

It is preferable to form a reflection layer inside rather than the periphery of a phosphor layer.

In the flat cathode ray tube of the present invention, since the fluorescent surface is formed in the reflecting layer and the phosphor layer provided with the conductivity by transfer from the transfer foil, uniformity is ensured in the film quality of each layer, and image display quality is improved.

Since the reflective layer also serves as the electrode layer, the electrode layer is omitted, thereby simplifying the film structure of the fluorescent surface.

When the reflective layer constituting the fluorescent surface is formed inside the periphery of the phosphor layer, the reflective layer protrudes so as not to display unnecessary frames around the image. Therefore, the image display is not bad and the display quality is stabilized.

In the method for manufacturing a flat cathode ray tube according to the present invention, a transfer foil comprising at least a phosphor layer, a reflection layer, and an electrode layer laminated on a transfer substrate is prepared, and the electrode layer side of the transfer foil is heated and pressed to an inner surface of the panel to be bonded, and transferred. The substrate is peeled off to transfer the phosphor surface composed of the phosphor layer, the reflective layer and the electrode layer.

It is preferable to form the reflective layer in the transfer foil inside the periphery of the phosphor layer.

In the manufacturing method of the flat cathode ray tube of the present invention, a fluorescent surface is produced on the inner surface of the panel by a transfer method using a transfer foil in which at least a phosphor layer, a reflective layer, and an electrode layer are laminated on a transfer substrate, thereby shortening the fluorescent surface manufacturing process. Moreover, the film quality of each layer which comprises a fluorescent surface is made uniform, and it can manufacture by batch transfer.

Production of Flat Cathode Tubes in which Each Phosphor Layer, Reflective Layer, and Electrode Layer Are Laminated, When the Reflective Layer Uses a Transfer Foil Inner Than the Periphery of the Phosphor Layer, The Reflective Layer is Not Widely Formed Than the Phosphor Layer, and Image Display is Not Bad Becomes possible.

In the method of manufacturing a flat cathode ray tube according to the present invention, a transfer foil comprising at least a phosphor and a conductive layer having a conductivity laminated thereon is prepared on a transfer substrate, and the reflective layer side of the transfer foil is heated and pressed to the inner surface of the panel to be bonded, and transferred. The substrate is peeled off to transfer the phosphor surface composed of the phosphor layer and the reflective layer.

It is preferable to form the reflective layer in the transfer foil inside the periphery of the phosphor layer.

In the manufacturing method of the flat cathode ray tube of the present invention, a fluorescent surface is produced on the inner surface of the panel by a transfer method using a transfer foil in which at least a phosphor layer and a reflecting layer imparting conductivity are laminated on a transfer substrate, thereby shortening the fluorescent surface manufacturing process. The film quality of each layer constituting the fluorescent surface can be made uniform, whereby batch transfer can be made.

When the phosphor layer, the reflecting layer, and the electrode layer are stacked, and the reflecting layer uses the transfer foil formed inside the periphery of the phosphor layer, the reflecting layer is not formed wider than the phosphor layer, and thus the display quality of the flat cathode ray tube with stable display quality is not bad. Manufacturing becomes possible.

Since the reflective layer of the transfer foil also serves as the electrode layer, the electrode layer is omitted so that the film structure of the transfer foil is simplified, thus simplifying the film structure of the fluorescent surface.

Embodiment of the Invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show one embodiment of a flat cathode ray tube in the present invention. In addition, FIG. 1: is a block diagram which has a partial cross section, FIG. 2 is a block diagram of the one panel which removed this front panel, and a screen panel in this example.

The flat cathode ray tube 1 according to the present embodiment includes a first panel, a front panel 2 in this example, a second panel on which a fluorescent screen 6 is formed, a screen panel 3 in this example, and a perimeter ( 4) The glass tube body 5 which is joined by the frit glass bonding parts 8a and 8b is included, and the electron gun 7 is enclosed in the neck part of the said perimeter 4, and is comprised. Although not shown outside the perimeter 4, a deflection yoke for deflecting the electron beam emitted from the electron gun 7 is disposed.

As shown in Fig. 2, the screen panel 3 has an inner surface formed with a predetermined curvature surface, and a rising portion, a so-called skirt portion 10, is formed at its three-way edge. The top 10a of the skirt 10 of the screen panel 3 is bonded to the front panel 2 at the frit glass joint 8a of FIG. 1, and the bottom 10b of the screen panel is also shown in FIG. 1. It is bonded with respect to the perm 4 by the frit glass bonding part 8b.

The fluorescent surface 6 is deposited on the inner surface 3A having the curvature of the screen panel 3. That is, the electrode layer (for example, transparent conductive film 12) on the surface of the screen panel 3 except for the skirt portion 10 of the inner surface 3A and the so-called blend R portion 11 that extends from the skirt portion 10 to the inner surface. The phosphor surface 14 is formed by forming the phosphor layer 14 through the reflective layer 13 in the area corresponding to the effective screen on the upper side thereof.

A conductive film 16 such as a built-in conductive film, for example, a carbon film, is coated and formed on the inner surface of the funnel 4, and the conductive film 16 is applied to the electrode layer 12 on the inner surface of the screen panel 3. It is electrically connected to a voltage applying terminal (not shown) for applying a.

In this embodiment, in particular, the reflective layer 13 is formed to be inward of the periphery of the phosphor layer 14. That is, the area of the reflective layer 13 is made smaller than the area of the phosphor layer 14 so that the decrease in the emission luminance at the periphery of the fluorescent surface is not noticeable and the visibility as the fluorescent surface is not deteriorated. The difference d between the periphery of the reflective layer 13 and the periphery of the phosphor layer 14 is 0.5 mm or less when viewed from one side, and the sum can be 1.0 mm or less when viewed from both sides of the top, bottom, left, and right sides.

The reflective layer 12 includes, for example, titanium oxide (TiO ₂ ), aluminum oxide (Al ₂ O ₃ ), tin oxide (SnO _X ), zinc sulfide (ZnS), barium sulfate (BaSO ₄ ), and calcium carbonate (CaCO _3). ) And a white inorganic material layer such as magnesium oxide (MgO). In addition, for example, a metal film such as aluminum (Al) may be used as the reflective layer 13.

In this example, the titanium oxide layer 13 is formed inside the periphery of the phosphor layer 14 using the titanium oxide layer which is a white inorganic material as the reflective layer 13.

In this flat cathode ray tube 1, a positive voltage (so-called anode voltage) of, for example, 5 to 10 KV is applied to the electrode layer 12 through the voltage applying terminal and the conductive film 16. The electron beam generated from the electron gun 7 is accelerated toward the electrode layer 12 and irradiated to the phosphor layer 14. As a result, the phosphor layer 14 emits light, and the light partially transmitted through the emitted light is reflected by the reflecting layer 12 and then is projected through the front panel 2 as image information.

The electrode layer 12 is preferably as small as possible in order to prevent defects, charge-ups, etc., in which the resistance thereof rises, and can be formed at 300 kPa or less.

According to the flat cathode ray tube 1 according to the present embodiment, the titanium oxide layer 13 is formed of the phosphor layer 14 by using, for example, a white inorganic material layer as the reflective layer 13 and a titanium oxide layer in this example. By forming the inner side of the surroundings, the visibility of the display image, that is, the display quality, can be improved.

In the case of forming the fluorescent surface 6 by the transfer method described below, a transfer layer on the transfer film, that is, a sequential release layer, a phosphor layer, a reflective layer (for example, a white inorganic material layer), an electrode layer, an adhesive layer, and the like are formed by screen printing. Although a transfer foil is produced, screen printing of the reflective layer on the phosphor layer with the same area at this time may cause sagging when applied at the periphery. As a result, upon transfer to the inner surface of the screen panel, the reflection layer is formed wider than the phosphor layer. As a result, when the image information is reflected, the periphery of the reflection layer appears as a white frame, and the contrast and image visibility, that is, the display quality, are significantly degraded. This point is improved in this embodiment.

In addition, even when an aluminum film is used as the reflective layer, even if the aluminum film slightly protrudes from the phosphor layer, the reflected light is noticeable around the video information, and the contrast and display quality are similarly degraded. This point is improved in this embodiment.

When the electrode layer 12, the reflective layer 13 and the phosphor layer 14 are laminated on the inner surface of the screen panel 3 to form the phosphor surface 6, the respective layers 12, 13, 14 Uniformity of the film quality can be ensured, and the image display quality can be improved.

Next, the manufacturing method of a reflective flat cathode ray tube, especially the manufacturing method of the fluorescent surface 6, is demonstrated with reference to FIGS. 4 and 5A-5D.

First, the transfer foil 21 shown to FIG. 4A and FIG. 4B is produced. The transfer foil 21 is sequentially formed on the transfer substrate, for example, the transfer film 22, on the release layer 23, the phosphor layer 14, the reflective layer, and in this example, a titanium oxide layer (TiO ₂ layer: 13). In this example, the electrode layer, the ITO electrode layer 12 and the adhesive layer 24 of the transparent electrode are formed by printing (for example, screen printing or gravure printing).

That is, the peeling layer 23 which has a function which vaporizes on the transfer film 22 at predetermined temperature (for example, about 200 degreeC), and vaporizes at higher temperature (for example, about 300 degreeC) than peeling temperature. Form. As the transfer film 22, a resin film, for example, a PET (polyethylene terephthalate) film having a thickness of about 25 to 100 m, and about 75 m is used in this example. In addition, the peeling layer 23 can use acrylic resin, for example, and is formed in thickness of about 6-10 micrometers.

On the release layer 23, the phosphor layer 14 having the same area as the effective screen is formed by screen printing, for example. The phosphor layer 14 is composed of, for example, fine particles such as Y ₂ O ₂ S (sulfide yttrium oxide) or Y ₂ O ₂ S: Tb (sulfide yttrium oxide: terbium reactivity), for example, an average particle diameter of 4.5 μm or less. ) Is formed to a thickness of about 20 to 30 μm.

On the phosphor layer 14, for example, a white inorganic material layer serving as a reflective layer, and a titanium oxide layer 13 in this example, are formed in a thickness of about 10 to 15 mu m. At this time, the titanium oxide layer 13 is formed to have an area slightly smaller than the area of the phosphor layer 14 so as to be inward from the periphery of the phosphor layer 14. The titanium oxide layer 13 is formed by printing using a coating material (so-called paste body) composed of titanium oxide particles and a binder. Here, the titanium oxide layer 13 should be printed so as not to cause bleeding, blur, or the like on the surface of the phosphor layer 14 having a large particle size of the phosphor.

Since the TiO ₂ particles are smaller than the phosphor particles and the viscosity of the titanium oxide paint is relatively low, when the titanium oxide layer 13 is printed on the surface of the phosphor layer 14 with the same area as the phosphor layer 14, the phosphor layer ( There is a risk of protruding from the periphery of 14) and widening greatly. When the titanium oxide layer 13 is wider than the phosphor layer 14, the periphery of the titanium oxide layer 13 appears as a white frame as described above, thereby degrading the display quality of the flat cathode ray tube. For this reason, the titanium oxide layer 13 is printed with an area smaller than the area of the phosphor layer 14 so that it does not hang around.

In addition, since the film thickness of the titanium oxide layer 13 is secured and printed so as not to cause clouding or the like, the viscosity of the coating material of the titanium oxide layer 13 is preferably about 10 to 80 Pa · S. Moreover, as the binder used for this titanium oxide paint, acrylic resin containing ethyl cellulose is preferable, for example.

On the titanium oxide layer 13, an electrode layer for applying an anode voltage, an ITO electrode layer 12 which is a transparent conductive film in this example, is formed. The ITO electrode layer 12 is formed with an area corresponding to the area over the entire surface except for the skirt portion 10 and the blend R portion 11 on the inner surface of the screen panel. In addition, the adhesive layer 24 is formed on the ITO electrode layer 12. The adhesive layer 24 is an adhesive layer having a function of evaporating at a temperature higher than the temperature at which the release layer 23 is vaporized. For example, a butyral resin, a polyamide resin, or the like may be used, and the thickness of the adhesive layer 24 may be about 6 to 10 μm. Form. The butyral resin and the polyamide resin are vaporized at a temperature of about 400 to 485 캜.

Formation of the release layer 23, the phosphor layer 14, the titanium oxide layer 13 of the reflective layer, the ITO electrode layer 12 of the electrode layer, and the adhesive layer 24 with respect to the transfer film 22 described above is, for example, a screen. It is done by printing. After each screen is formed by screen printing, the film is dried by natural drying or a dryer, and the film thickness of each layer is stabilized. This drying process can be performed for each layer. That is, after performing screen printing and drying, the process of performing the screen printing of the next layer can be repeated, and a transfer foil can be produced. In this way, the transfer foil 21 is produced.

In the manufacture of the fluorescent surface 6 on the inner surface of the screen panel 3, the transfer foil 21 is prepared.

First, as shown in FIG. 5A, the transfer foil 21 is held on the inner surface 3A of the screen panel 3 via the adhesive layer 24.

Subsequently, the screen panel 3 is heated to the temperature (for example, about 200 degreeC) which the transfer film 22 peels. As a result, the ITO electrode layer 12, the titanium oxide layer 13, and the phosphor layer 14 are adhered to the screen panel 3 via the adhesive layer 24 as shown in FIG. The transfer film 22 on 23 is dissociated and removed.

In addition, when transferring a transfer foil using the below-mentioned transfer apparatus, it can carry out via the heat transfer roller heated at the predetermined temperature (200 degreeC-250 degreeC) on the transfer apparatus side, without heating the screen panel 3. .

Subsequently, the screen panel 3 from which the transfer film 22 has been removed is heated to a temperature higher than the peeling temperature of the transfer film 22 (for example, about 300 ° C.). As a result, as shown in FIG. 5C, the release layer 23 is vaporized and exhausted from the screen panel 3.

After removing the peeling layer 23, the screen panel 3 is then heated to a temperature higher than the temperature which the peeling layer 23 vaporized (for example, about 400 degreeC-485 degreeC). Accordingly, as shown in FIG. 5D, the adhesive layer 24 is vaporized and exhausted through the ITO electrode layer 12, the titanium oxide layer 13, and the phosphor layer 14. By doing in this way, the fluorescent surface 6 in which the electrode layer 12 and the reflective layer 13 were formed inside the periphery of the fluorescent substance layer 14 can be produced in 3 A of inner surfaces of the screen panel 3 according to the thermal transfer method. .

Here, the present embodiment is also characterized in that the white inorganic material layer serving as the reflective layer 12 can be formed on the screen panel 3 by the transfer method.

Conventionally, a slurry method is known for the formation of a white inorganic material layer, for example, a titanium oxide layer (see Japanese Patent Application Laid-Open No. Hei 11-96948), but no formation in the transfer method has been attempted. The reason is that the optimum conditions necessary for screen printing the titanium oxide layer could not be found.

In the present invention, the viscosity of the titanium oxide paint (paste) is 10 to 80 Pa · S, and an acrylic resin containing, for example, ethyl cellulose is used as the binder, and the screen material suitable for this viscosity and the mesh material of the screen plate are optimized. Thus, the optimum condition capable of screen printing was found to overcome the difficulty in transferring. For example, by making the mesh dimension finer than before, the titanium oxide layer can be formed on the phosphor layer having a large particle size.

According to the manufacturing method of the flat cathode ray tube according to the present embodiment, the area slightly smaller than the exfoliation layer 23, the phosphor layer 14, and the phosphor layer 23 is sequentially screened, for example, by screen printing. The fluorescent surface 6 is transferred by a transfer method using a transfer foil 21 formed by forming a titanium oxide layer 13 to be a reflective layer of the electrode, an ITO electrode layer 12 and an adhesive layer 24 to be an electrode layer, for example. Therefore, the periphery of the phosphor layer 14 after firing is formed on the fluorescent surface 6 of the reflective flat cathode ray tube larger than the titanium oxide layer 13 serving as the reflective layer, and the quality of the formation process of the titanium oxide layer 13 is improved. It is stable. At the same time, the titanium oxide layer 13 does not protrude to be displayed like a white frame, and a flat cathode ray tube with improved display quality can be manufactured. In addition, the titanium oxide layer 13 has a large refractive index, and by using the titanium oxide layer 13 as a reflective layer, it is possible to easily manufacture a high-brightness flat cathode ray tube with high reflection efficiency.

Since the transfer foil 21 formed by stacking the phosphor layer 14, the reflective layer 13, and the electrode layer 12 is used, it can be formed on the fluorescent surface and the inner surface of the screen panel 3 by batch transfer. Moreover, the film quality of each layer 12, 13, 14 also becomes uniform, and the flat cathode ray tube which has the fluorescent surface of which quality was stable can be manufactured easily.

6A and 6B show another embodiment of the transfer foil according to the present invention.

The transfer foil 31 of the present embodiment is a release layer 23, a phosphor layer 14, a reflection layer, in this example a titanium oxide layer (TiO ₂ layer: 13), and an electrode component on the transfer film 22 in sequence. And an electrode layer 32 made of a mixed material containing an adhesive component and formed by printing (for example, screen printing or gravure printing). In addition, since the transfer film 22, the peeling layer 23, the phosphor layer 14, and the reflecting layer 13 can use the same thing as the transfer foil 21 mentioned above, detailed description is abbreviate | omitted.

That is, the peeling which has a function which vaporizes at the temperature (for example, about 300 degreeC) higher than the temperature which peels while peeling at predetermined temperature (for example, about 200 degreeC) on the transfer film 22 as mentioned above. Layer 23 is formed. The phosphor layer 14 having the same area as the effective screen is formed on the release layer 23. On the phosphor layer 14, the titanium oxide layer 13 used as a reflection layer is formed. At this time, the titanium oxide layer 13 is formed to be inward of the periphery of the phosphor layer 14, and thus to have a slightly smaller area than the area of the phosphor layer 14.

In order to cover the phosphor layer 14 and the titanium oxide layer 13, an electrode layer 32 having a thickness of about 3 to 30 mu m for applying an anode voltage is formed thereon. The electrode layer 32 is formed on the entire surface of the inner surface of the screen panel 3. This electrode layer 32 is formed of a mixture of an electrode material and an adhesive material, and is provided with both a function as an electrode and a function as an adhesive layer in the preceding step of the transfer. Electrode components are microparticles | fine-particles (for example, particle size of 1 micrometer or less), such as ITO, are transparent, and those whose resistance value is 300 Pa or less after baking are used. In addition, depending on the application of the cathode ray tube, a material which becomes black gray after firing such as carbon or chromium oxide may be used as the electrode component.

On the other hand, the adhesive component vaporizes at a temperature higher than the temperature at which the release layer 23 vaporizes (for example, about 300 ° C), and belongs to the same series as the electrode component slurry. In consideration of the intimacy of the electrode agent and the adhesive resin, it is necessary to be manufactured so as not to separate. Specifically, in the case where the electrode agent is ITO, for example, a butyral-based resin or a polyamide resin vaporized at a temperature of about 400 to 485 ° C is used. In the case where the electrode solvent is made of acrylic resin, the adhesive component is also vaporized by an acrylic component, a binder contained in the paste, and the like, and the electrode layer 32 is an electrode layer containing only a transparent electrode material.

About the ratio of the electrode component and the adhesive component in the electrode layer 32, it is preferable to contain an electrode component in 20 to 80%, Preferably it is 40 to 60% of range. It is because if it is less than 20%, the function as an electrode layer will not fully be exhibited, and if it is more than 80%, it will not fully function as an adhesive layer with respect to the screen panel 3 at the time of transfer.

Formation of the peeling layer 23, the phosphor layer 14, the titanium oxide layer 13 of the reflective layer, and the electrode layer 32 with respect to the transfer film 22 described above is performed by screen printing, for example. Moreover, after screen printing is performed and each layer is formed, it is made to dry by natural drying, a dryer, etc., and the film thickness of each layer is stabilized. In this way, the transfer foil 31 is produced.

Next, the manufacturing method of the fluorescent surface 6 using the said transfer foil 31 is demonstrated with reference to FIG.

First, as shown in FIG. 7A, the transfer foil 31 is held on the inner surface of the screen panel 3 by using an adhesive function of the electrode layer 32 formed on the transfer film 22. Subsequently, this screen panel 3 is heated to the temperature (for example, about 200 degreeC) which the transfer film 22 peels. Thus, as shown in FIG. 7B, the electrode layer 32, the reflective layer 13, and the phosphor layer 14 are adhered to the screen panel 3, and the transfer film 22 on the release layer 23 is formed. This is removed by dissociation.

Also in this case, when transferring the transfer foil using the transfer apparatus mentioned later as mentioned above, the screen panel 3 can be performed through the heat transfer roller heated at predetermined temperature, without heating.

In addition, the screen panel 3 from which the transfer film 22 has been removed is heated to a temperature (for example, about 300 ° C.) higher than the peeling temperature of the transfer film 22. As a result, as shown in FIG. 7C, the release layer 23 is vaporized and exhausted from the screen panel 3. After removing the peeling layer 23, the screen panel 3 is heated to a temperature (for example, about 400-485 degreeC) higher than the temperature which the peeling layer 23 vaporized. As a result, as shown in FIG. 7D, the adhesive component of the electrode layer 32 is evaporated and exhausted through the particles between the electrode component of the electrode layer 32, the reflective layer 13, and the phosphor layer 14. After the adhesive component has vaporized, the electrode layer 32 becomes an electrode layer made of only a transparent electrode material.

By doing in this way, the fluorescent surface 6 in which the electrode layer 32 and the reflective layer 13 were formed inside the periphery of the fluorescent substance layer 14 in 3 A of inner surfaces of the screen panel 3 can be manufactured by the thermal transfer system.

According to the manufacturing method of the flat cathode ray tube according to the present embodiment, the area slightly smaller than the exfoliation layer 23, the phosphor layer 14, and the phosphor layer 23 is sequentially screened, for example, by screen printing. For example, since the fluorescent surface is produced by the transfer method using the transfer foil 31 formed by laminating the titanium oxide layer 13 and the electrode layer 32 to be a reflective layer, the fluorescent surface 6 of the reflective flat cathode ray tube The circumference | surroundings of the phosphor layer 14 after baking are formed larger than the reflection layer 13, and the quality of the formation process of the reflection layer 13 is stabilized. At the same time, the reflective layer 13 does not protrude and is displayed like a white frame, so that a flat cathode ray tube with improved display quality can be manufactured.

By using the titanium oxide layer 13 for a reflection layer, a high-brightness flat cathode ray tube can be manufactured with high reflection efficiency.

In addition, since the electrode layer 32 of the transfer foil 31 is formed of a mixed material containing an adhesive component, there is no need to separately form an adhesive layer on the electrode layer 32, and thus it is formed on the transfer film 22. The number of layers is reduced. Therefore, the number of work steps can be simplified, and the occurrence of a defective rate can also be reduced.

Since the transfer foil 31 formed by stacking the phosphor layer 14, the reflective layer 13, and the electrode layer 32 is used, the fluorescent surface can be formed on the inner surface of the screen panel 3 by batch transfer. In addition, the film quality of each layer 32, 13, 14 also becomes uniform, and a flat cathode ray tube having a fluorescent surface with stable quality can be easily manufactured.

Although the transfer foils 21 and 31 described above were configured in a single-leaf type, other as shown in Fig. 4 or 6 with a predetermined interval on the transfer film 42 elongated in the longitudinal direction as shown in Fig. 8. The same layer structure, for example, a release layer 23, a phosphor layer 14, a reflective layer 13, a layer structure composed of an electrode layer 12 and an adhesive layer 24, or a release layer 23, phosphor layer 14 The roll type transfer foil 41 in which the several transfer foil elements 43 of the layer structure which consist of the reflective layer 13 and the electrode layer 32 was formed can be comprised. Continuous thermal transfer is possible by using the roll transfer foil 41 thinner than this.

In addition, during the peeling of the transfer film, the transfer film and the release layer may be integrally peeled off. At this time, the heat treatment on the screen panel side for removing the release layer after transfer can be omitted.

In the ordinary transfer foils 21, 31, and 41, the release layer 23 is formed on the transfer film 22 or 42, and the phosphor layer 14 is formed on the release layer 23. By using a transfer film having a peeling function in the film itself, for example, applying a silicone coat or a wax coat to the transfer film, or forming a thermoplastic resin, the peeling layer formed separately is omitted, and the film is transferred onto the transfer film. The transfer foil can also be configured by forming the phosphor layer 14 directly.

As the reflective layer 13 constituting the transfer foil of the present invention, for example, tin oxide may be applied, but this tin oxide is expensive and has a low refractive index as compared with titanium oxide. On the other hand, titanium oxide is inexpensive, has a higher refractive index, and is excellent in reflection efficiency as a reflective layer, so that the screen can be made higher in brightness.

In FIG. 1, the reflective fluorescent surface 6, i.e., the electrode layer 12, the reflective layer 13 and the phosphor layer 14, formed by the transfer from the transfer foil is formed on the inner surface 3A of the screen panel 3. Although a reflective flat cathode ray tube 1 is formed, although not shown in the drawing, a transmissive fluorescent surface, i.e., an electrode layer, a phosphor layer and a reflective layer, is formed on the inner surface 3A of the screen panel 3 by transfer from a transfer foil. It is also possible to form a transmissive flat cathode ray tube which is formed in order, and the reflecting layer is formed so as to be inward from the periphery of the phosphor layer. Although not shown, a fluorescent surface having the same film structure as that of the fluorescent surface 6 of FIG. 1, i.e., the electrode layer 12, the reflective layer 13, and the phosphor, is transferred to the inner surface 3A of the screen panel 3 by transfer from the transfer foil. The transmissive flat cathode ray tube formed by forming the layer 14 and making the reflective layer 13 into the thickness of an electron beam permeable film at this time, or forming the fluorescent substance layer 14 thick can also be comprised.

In addition, as shown in Fig. 3, on the inner surface of the front panel 2, which is the first panel, the fluorescent surface 17, i.e., the electrode layer 12, the phosphor layer 14, and the reflective layer (e.g., A transmissive flat cathode ray tube 18 is formed by forming a layer 19 made of the same material as the reflective layer 13 of FIG. 1 and forming the reflective layer 19 so as to be inward from the periphery of the phosphor layer 14. It can also be configured. In this case, the front panel 2 becomes a so-called screen panel.

In the above description, the electrode layer 12, the reflective layer 13 made of the white inorganic material layer, and the phosphor layer 14 were formed by laminating the fluorescent surface 6 according to the transfer method. The electrode layer 12 may be omitted by using both the reflective layer and the electrode layer. That is, the reflective layer by the conductive white inorganic material layer and the fluorescent surface by the phosphor layer thereon may be collectively transferred to the inner surface of the screen panel as usual. In this case, even if it does not have electroconductivity, electroconductivity may be provided to a white inorganic material layer as electroconductivity, such as ITO (indium tin oxide), is mixed. As the white inorganic material layer serving as the reflective layer serves as the electrode layer, the electrode layer is omitted, thereby simplifying the film structure of the fluorescent surface.

Next, an embodiment of a transfer method and a transfer apparatus according to the present invention will be described with reference to FIGS. 9 to 23. In this example, this is the case where the fluorescent screen 6 is transferred to the inner surface of the screen panel 3 described above.

Fig. 9 shows a schematic configuration of a transfer device 51 according to the present embodiment, which is applicable to the transfer of the fluorescent surface to the screen panel of the flat cathode ray tube described above.

The transfer device 51 controls the transfer pressure of the work support 52, the heat transfer roller 53, and the heat transfer roller 53 to mount and fix the screen panel 3 to be a workpiece (transfer body). And a moving means 56 for moving the thermal transfer roller 53 at a constant speed in the transfer direction. The pressurizing means 50, for example, the main pressurizing means 54 for pressurizing the heat transfer roller 53 to the inner surface of the screen panel 3 through the transfer foil, and the pressing force of the heat transfer roller 53 to the transfer foil. In this example, the pressure control means 55 controls the pressing force (so-called pressure distribution on the inner surface of the panel) of the main pressing means 54 so as to control the pressing force. It is disposed on the support 60 through a frame or the like.

The work support 52 is on the support 60 and has a mounting surface 58 that is identical to the outer surface shape of the screen panel 3, and although not shown, the screen panel 3 is provided on the mounting surface 58 with an inner surface 3A. ) Is configured to be fixed by vacuum adsorption in a state where the side is mounted upward. That is, a plurality of absorption holes are formed on the mounting surface 58, and the screen panel 3 closes the absorption holes, so that vacuum suction can be made possible and maintained. The work support 52 is disposed on the so-called XY table 59, which is made movable in the X direction and the Y direction in the horizontal plane for positioning.

The heat transfer roller 53 is rotatable about the horizontal drive shaft 61 and is slightly smaller than the length that can be inserted into the screen panel 3, that is, the width inside the screen panel 3 (width in the horizontal direction of the screen). It has a short length and comprises a cutout 62 over the entire length in the longitudinal direction on a part of the outer surface (see Figs. 9 and 10). The heat transfer roller 53 may be formed of an elastic roller having a hardness of about 70 to 90 degrees, for example, about 80 degrees, for example, a silicon roller made of heat resistant silicon or the like.

The cutout 62 is formed on the surface side of the heat transfer roller 53 so as to have an opening of, for example, 90 ° in one place of the outer circumference, as shown, for example, in FIG. Alternatively, the cutout 62 is formed so as to have an opening of, for example, 90 ° in two places, which are axially symmetrical in the plural places, as shown in Fig. 11B, for example. The heat transfer roller 53 is configured to move from one side of the inner surface of the screen panel 3, that is, the skirt portion 10 side, along the curvature toward the perimeter joint portion when transferring the transfer foil.

The semi-cylindrical heating heater means 64 is fixedly arranged in the upper direction of the heat transfer roller 53 (refer FIG. 9, FIG. 10). The heat transfer roller 53 is heated by this heating heater means 64 and managed at a required temperature, that is, a temperature at which heat transfer is possible, for example, 200 ° to 250 °. At the time of heating of the heat transfer roller 53, the heat transfer roller 53 is rotated, and the whole roller is heated so that the whole roller may evenly become a management temperature. The heating heater means 64 is comprised by embedding the some rod-shaped heater 65 in the heater cover 66. As shown in FIG.

On the other hand, the fixed substrate 68 and the movable member 69 arrange | positioned so that it may be connected and movable to this fixed substrate 68 are provided. The movable member 69 is rotatably supported while being held to one side through the connecting member 70 at both sides at one end of the one end side of the fixing substrate 68 and is also connected to the heat transfer roller 53. It is connected via the member 71. The movable member 69 and the heat transfer roller 53 are connected to both sides of the middle of the movable member 69 and both ends of the drive shaft 61 of the heat transfer roller 53 through the connection member 71. The connecting member 71 is rotatably attached to the movable member 69 and the drive shaft 61 of the heat transfer roller 53.

The main pressurizing means 54 fixed to the supporting part, not shown, is formed of, for example, an air cylinder (hereinafter referred to as a main cylinder), and the tip of the cylinder rod 54a is fixed to the center position of the fixed substrate 68. do. The pressure control means 55 is formed of, for example, an airbag cylinder (hereinafter referred to as a pressure control cylinder), is attached to the other end side of the fixed substrate 68 and the tip of the cylinder rod 55a is movable member 69. ) Is fixed to the other end side. The pressure is set so that the main cylinder 54 may apply a constant pressure with respect to the screen panel 3 which is a to-be-transferred body at the time of transfer. The pressure is set so that the pressure control cylinder 55 adjusts the pressure applied to the screen panel 3 to be maintained at a constant transfer pressure.

The pressure of the pressure control cylinder 55 is set to a value smaller than the pressure of the main cylinder 54 and larger than the transfer pressure by the heat transfer roller 53. The pressure (transfer pressure) applied to the screen panel 3 is managed by the pressure control cylinder 55 so as to be constant at a required pressure, for example, 3 kgf / cm 2 to 5 kgf / cm 2. This transfer pressure is made to be monitored by the pressure gauge which is not shown in figure.

The detection apparatus 79 which detects the rotation position at the start of the transfer of the thermal transfer roller 53, ie, the rotation position of the cutout 62, is provided. This detection device 79 is composed of a detection plate 74 and a photoelectric sensor 78.

The detection plate 74 is provided coaxially with the heat transfer roller 53 in this example so as to rotate in conjunction with the rotation of the heat transfer roller 53. That is, one end of the drive shaft 61 of the heat transfer roller 53 rotates integrally with the heat transfer roller 53, and the cutout portion 62 of the heat transfer roller 53 is inclined at a predetermined angle θ (described later). A detection plate (so-called encoder) 74 is attached to detect a position tilted by an angle θ at the first position in contact with the skirt portion 10 of the screen panel 3 at the time of transferring. The detection plate 74 forms a disk shape and forms a linear slit 75 extending radially in one circumferential direction, and the slit 75 is formed of the cutout 62. An angle θ (see FIG. 14) formed by one edge 62a is attached to the drive shaft 61 so as to be a required angle, for example, 2 ° to 10 °, and 5 ° in this example.

The detection plate 74 is sandwiched with a photoelectric sensor 78 composed of a pair of light emitting elements 76 and a light receiving element 77 (see FIGS. 10 and 12). In this case, when the slit 75 of the detection plate 74 is at the vertical position, light from the light emitting element 76 is received by the light receiving element 77 through the slit 75, and the thermal transfer roller 53 It is detected that the cutout portion 62 of the c) comes to a predetermined position with the angle? The motor 57 for rotationally driving the heat transfer roller 53 is provided at the other end of the drive shaft 61 (see FIG. 10).

Next, the transfer method will be described along with the operation of the transfer device 51 described above.

14 to 16 show the case where the fluorescent surface is transferred to the inner surface of the screen panel 3 using the transfer foil 90 in a single-leaf type. When the transfer foil is a sheet type, the transfer foil is supplied one by one with the screen panel. As the transfer film 90, the transfer foils 21 and 31 described in FIGS. 4 and 6 described above can be used.

First, the heat transfer roller 53 is temperature-controlled and rotates before transfer start. That is, the heat transfer roller 53 rotates by the heating heater means 64 in the state heated and adjusted to predetermined temperature, ie, the temperature which the transfer film of the transfer foil 90 peels. The screen panel 3 which should form a fluorescent surface is conveyed onto the work support 52, and is set. The transfer foil 90 is disposed on the inner surface of the screen panel 3. The transfer start switch is turned on, the work support 52 is moved by the XY table 59, and the screen panel 3 moves to a predetermined position directly below the heat transfer roller 53.

In response to the signal that the screen panel 3 has moved to the predetermined position, the preparation for starting the device 51 is completed.

Subsequently, as shown in FIG. 14, the position of the slit 75 of the detection plate 74 is detected by the detection means 78, and it is detected that the heat transfer roller 53 has come to a predetermined rotational position. At this time, the cut portion 62 of the heat transfer roller 53 corresponds to the upper end of the skirt portion 10 of the screen panel 3, and one edge 62a of the cut portion 62 has a vertical line, for example. Located at 5 ° tilt. When the heat transfer roller 53 comes to this predetermined rotational position, the heating heater means 64 is turned off and the rotation of the heat transfer roller 53 is stopped.

Subsequently, as shown in FIG. 15, the main cylinder 54 is driven, and the heat transfer roller 53 is lowered together with the fixed substrate 68, and the cut portion 62 is placed on the upper end of the skirt portion 10. By positioning, the thermal transfer roller 53 is pressed against the transfer start end of the transfer foil 90. At this time, since the edge 62a of one of the cutouts 62 is inclined by 5 °, the edge of the cutout 62 does not touch the transfer foil 90 (particularly, its transfer layer), but the cylindrical surface touches. The transfer foil 90 is not moved.

On the other hand, the primary pressure of the cylinder 54 has a pre-heat the transfer roller 53 is set to a pressure F ₁ for pressing on the lowermost position E ₁ of the screen of the panel 3 as shown in Fig. For example, it is set to about 10 kgf / cm 2. On the other hand, when the transfer pressure to the screen panel 3 at the time of transfer is made constant, for example, 4 kgf / cm 2 over the whole area, the pressure of the pressure control cylinder 55 is the intermediate pressure between the pressure of the main cylinder 54 and the transfer pressure. Is set.

If it is set in such a pressure relationship, when the heat transfer roller 53 pressurizes the skirt part 10 by the main cylinder 54, as shown in FIG. 19, the differential pressure ΔF is applied to the pressure control cylinder 55. It is absorbed by, and a constant pressure of 4kgf / ㎠ to the skirt portion 10 is applied. That is, as the cylinder rod 55a of the pressure adsorption cylinder 55 retreats by the difference ΔF of the pressure, the movable member 69 rotates around the axis 70A of the coupling member 70, and the heat transfer roller As the 53 is raised, the pressing force against the transfer foil 90 of the heat transfer roller 53 is kept constant at 4 kgf / cm 2.

Subsequently, the moving means 56 is driven, and the main cylinder 54 and the right side from the right side to the left side of the screen panel 3 are moved from the skirt portion 10 toward the perimeter joining side in FIGS. 16 and 17. The entire drive mechanism including the heat transfer roller 53 moves. In accordance with this movement, the heat transfer roller 53 moves while naturally rotating along the inner surface having the curvature of the screen panel 3, and also with a pressure control cylinder 55 at a constant pressing force (for example, 4 kgf / cm 2). It pressurizes, it heats, and the transfer foil 90 adheres to the screen panel 3.

At this time, the heat transfer roller 53 is rotated to the end of the width of the inner surface of the screen panel 3 and evenly transfer screen foil 3 even if the screen panel 3 having a three-dimensional curved surface in accordance with the operation of the pressure control cylinder 55. do.

By moving the heat transfer roller 53 in one direction, the air between the transfer foil 90 and the screen panel 3 escapes to the open end (so-called front panel), so that the transfer foil does not generate wrinkles. 90 closely contacts the inner surface of the screen panel 3. When the heat transfer roller 53 comes to the transfer end of the screen panel 3 as shown in FIG. 17, the cylinder rod 54a of the main cylinder 54 retreats, and the heat transfer roller 53 raises. Adhesion to the inner surface of the screen panel 3 of the transfer foil 90 is completed.

Then, the rotation of the heat transfer roller 53 starts again, and the heating heater means 65 is turned on to adjust the temperature of the heat transfer roller 53. The entire drive mechanism including the main cylinder 54 and the heat transfer roller 53 is moved from the left side to the right side by the moving means 56, and returns to the standby state.

Subsequently, the screen panel 3 is extracted, the transfer film of the transfer foil 90 is peeled off, and further fired by the above-described thermal process to remove the organic matter in the transfer foil to form a desired transfer layer, in this example, a fluorescent surface. do. That is, the thermal transfer of the fluorescent surface to the inner surface of the screen panel 3 is completed.

In the actual transfer device 51, as shown in Fig. 18, the thermal transfer roller 53 is rotated by the transfer foil with respect to the inner surface of the screen panel 3, for example, by 1 / n (n is an integer) rotation. The transcription is made. In addition, as a mounting method of the screen panel 3 onto the work support 52, as shown, for example, in FIG. 13A, the joining surface 3b of the screen panel 3 with the front panel 2 is shown. ), Or a mounting method in which the inner surface (transfer inner surface: 3A) of the screen panel 3 is as horizontal as possible, as shown in FIG. 13B. In the case of the mounting method of FIG. 13B, mounting of the screen panel 3 and the transfer foil 90 is good. The same applies to the transfer apparatus 100 described later.

According to the transfer device 51 of the sheet type transfer foil 90 of this embodiment, according to the inner surface shape having the curvature of the screen panel 3 by providing the main cylinder 54 and the pressure control cylinder 55, The pressure control cylinder 55 is variable, and the pressure applied to the screen panel 3 is managed to be constant. Therefore, the pressure control cylinder 55 can control the pressing force of the main cylinder 54, and does not apply excessive pressure to the screen panel 3, for example, without damaging the screen panel 3, The transfer layer from the transfer foil 90 can be uniformly transferred to the surface of the screen panel 3. In particular, in the case where the transfer surface is curved in the X and Y directions and is the three-dimensional curved screen panel 3, the transfer pressure is controlled in accordance with the shape of the screen panel, and the transfer pressure with respect to each part of the screen panel 3 is kept constant. The transfer foil 90 can be uniformly adhered to the inner surface of the screen panel 3 while maintaining it.

Since the cutout 62 is provided along the axial direction on the surface corresponding to the rotational position of the transfer start of the thermal transfer roller 53, the end of the skirt portion 10 is pushed by the cutout 62 at the start of transfer. The heat transfer roller 53 can be brought into good contact with the inner surface of the skirt portion 10 of the screen panel 3. At the same time, the one side edge 62a of the cutout 62 is inclined by a predetermined angle θ with respect to the vertical, so that the heat transfer roller 53 contacts the inner surface of the skirt portion 10, thereby corresponding to the transfer layer of the transfer foil 90. The part of the cylindrical surface of the heat transfer roller 53 touches a part, and stable adhesion can be performed. That is, it is possible to avoid that the edge of the cutout 62 touches the transfer foil, whereby the transfer foil is twisted or scratched.

In the transfer, the air between the transfer foil 90 and the screen panel 3 is moved by moving the thermal transfer roller 53 from the skirt portion 10 side toward the perm bonding side with respect to the inner surface of the screen panel 3. The transfer foil 90 can be brought into close contact with the inner surface of the screen panel 3 without the occurrence of wrinkles, and can evenly adhere the transfer foil 90 to the open end side.

Since the transfer foil 90 is attached by the heat transfer roller 53 from the skirt side of the screen panel 3 toward the junction with the perimeter, the transfer pressure becomes optimal and the transfer layer (so-called fluorescent surface) The screen panel 3 is reliably transferred from the start (top of the screen) to the end (bottom of the screen). Therefore, after completion, the top edge line of the image displayed screen is ensured to have an accurate straight line shape, and the shape is improved. In other words, if the transfer pressure fluctuates, a part of the transfer layer remains on the transfer foil, for example, because the upper edge of the transferred transfer layer does not fit (for example, becomes jagged), and the inconsistency is noticeable when the image is displayed. It is treated as a defective product.

When the heat transfer roller 53 of this example has only one cutout portion 62 formed in the heat transfer roller 53, which is configured to rotate approximately half and allow one transfer foil to be transferred (A in FIG. 11). Since the transfer start portion of the thermal transfer roller 53 is one group, the transfer efficiency is limited. On the other hand, when there are two cutouts 62 of the heat transfer roller 53 (B of FIG. 11), the transfer start part of the heat transfer roller 53 becomes two places, and transfer efficiency improves.

Since a detection device 79 for detecting the rotational position of the cutout portion 62 of the heat transfer roller 53 is provided, and the detection plate 74 is coaxially attached to the heat transfer roller 53, The rotational position at the start of the transfer of the cutout portion 62 of the transfer roller 53 can be accurately aligned.

20 to 23 show a transfer device according to another embodiment and a transfer method thereof, which are applicable to transfer of a transfer layer from a continuous transfer foil, a so-called roller transfer foil. In this example, the fluorescent surface is continuously transferred onto the inner surface of the screen panel 3.

The transfer apparatus 100 capable of continuously transferring the fluorescent surface is made by adding the means shown in Fig. 20 to the transfer apparatus 51 of Fig. 9 described above. That is, the winding reel which winds up the supply reel 81 for supplying the roll type transfer foil 91 by which the several transfer foil element 93 is formed in the continuous transfer film 92, and the peeled transfer film. The transfer foil pressurizing guide means 83 (83A, 83B) which is arranged on the side of the 82 and the take-up reel 82, and constitutes a pair of rollers which sandwich the portion of the transfer film 92 of the transfer foil 91. And transfer foil pressing means 84 for fixing one end of the transfer foil 91 to the upper end of the skirt portion 10 of the screen panel 3, which is a transfer body, at the start of transfer in the vicinity of the work support 52. It is configured by. Moreover, as the transfer foil 91, the roller type transfer foil 41 etc. which were demonstrated in FIG. 8 mentioned above can be used.

The transfer foil pressurizing guide means 83 guides the transfer foil 91 and descends when the transfer foil 91 is set on the inner surface of the screen panel 3 so that the transfer foil 91 is removed from the screen panel 3. It has a function of crimping to the inner surface and rising at the end of the transfer to peel off the transfer film 92.

The transfer foil pressurizing means 84 is provided in a pair at a position corresponding to both ends of the width direction of the screen panel 3, that is, a position which does not interfere with the welding of the thermal transfer roller 53 to the transfer foil 91, The screen panel 3 is disposed to be in contact with and spaced apart from each other.

The transfer foil 91 supplied from the supply reel 81 has a back tension in the opposite direction to the supply direction, and is transferred and supplied in a tight state without looseness between the supply reel 81 and the take-up reel 82. .

The rest of the configuration is similar to that of the transfer device 51 in Fig. 9, so that the corresponding parts are denoted by the same reference numerals and redundant descriptions are omitted.

The operation and transfer method of the transfer device 100 are as follows.

As described above, the heat transfer roller 53 is rotated in a state where the heat transfer roller 53 is heated and adjusted to a predetermined temperature at which the transfer film 92 of the transfer foil 91 is peeled off by the heating heater means 64. Is in. The screen panel 3 which should form a fluorescent surface is conveyed onto the work support 52, and is set. Then, the transfer start switch is turned on, the work support 52 is moved by the XY table 59, and the screen panel 3 is positioned below the transfer foil 91, that is, directly under the heat transfer roller 53. Move to the corresponding predetermined position.

Subsequently, as shown in FIG. 20, the transfer foil pressurizing means 84 descends, and the transfer foil pressurizing means 84 compresses the transfer foil 91 to the upper end of the skirt portion 10 of the screen panel 3. . Further, the transfer foil pressurizing guide means 83 [83A, 83B] descends while the transfer foil 91 is fitted, and holds the transfer foil element 93 of the transfer foil 91 on the inner surface of the screen panel 3. Let's do it. The transfer foil pressurizing means 84 and the transfer foil pressurizing guide means 83 may be driven simultaneously.

Hereinafter, the operation as described above is performed. That is, the position of the slit 75 of the detection plate 74 is detected by the detection means 78, and it is detected that the heat transfer roller 53 has come to a predetermined rotational position. Accordingly, the cutout 62 of the heat transfer roller 53 is located at the top of the skirt 10 of the screen panel 3 with its edge 62a tilted, for example, by 5 ° with respect to the vertical line. While the heater heater 64 is turned off, the rotation of the heat transfer roller 53 is stopped (state of FIG. 20).

Next, as shown in FIG. 21, the main cylinder 54 is driven, the thermal transfer roller 53 is lowered together with the fixed substrate 68, and the cutout 62 is placed on the upper end of the skirt portion 10. By positioning, the thermal transfer roller 53 is pressed against the transfer start end of the transfer foil 90. The heat transfer roller 53 is pressed by the main cylinder 54 to the skirt portion 10 of the screen panel 3 through the transfer foil 90 and at the same time, the pressure difference ΔF as described in FIG. Absorbed by the control cylinder 55, the heat transfer roller 53 presses the transfer foil 91 by a constant transfer pressure.

Subsequently, the moving means 56 is driven, and the entire drive mechanism including the main cylinder 54 and the heat transfer roller 53 moves from right to left in FIGS. 21 and 22. In accordance with this movement, the heat transfer roller 53 moves while rotating along the inner surface having the curvature of the screen panel 3, and is pressurized with a constant transfer pressure by the pressure control cylinder 55, and heated to transfer the foil 91. To the screen panel 3. When the heat transfer roller 53 comes to the transfer end of the screen panel 3, the cylinder rod 54a of the main cylinder 54 retreats, and the heat transfer roller 53 raises as shown in FIG. Adhesion to the inner surface of the screen panel 3 of the transfer foil 91 is completed.

In addition, rotation of the heat transfer roller 53 starts, and the heating heater means 65 is turned on to adjust the temperature of the heat transfer roller 53. Subsequently, the transfer foil pressurizing means 84 and the transfer foil pressurizing guide means 83 rise simultaneously, and return to their original positions. At the time of return of the transfer foil pressurizing guide means 83, the transfer film 92 is peeled from the lower side toward the upper side (state of FIG. 23).

By the moving means 56, the whole drive mechanism including the main cylinder 54 and the heat transfer roller 53 moves from the left side to the right side, and returns to a standby state. Thereafter, the roller-type transfer foil 91 is wound around the winding reel 82, the next transfer foil element 92 is transferred, the same operation is repeated, and transfer is continuously performed.

Thereafter, the screen panel 3 is extracted from the work support 52 and the heat transfer of the fluorescent surface to the inner surface of the screen panel 3 is completed as the above-described heat treatment is performed on the screen panel 3.

According to the transfer device 100 using the rolled transfer foil 91 of the embodiment, as described above, the main cylinder 54 and the pressure control cylinder 55 have a curvature of the screen panel 3. The transfer foil 91 can be uniformly adhered to the inner surface of the screen panel 3 while keeping the pressure applied to the screen panel 3 constant by varying the pressure control cylinder 55 in accordance with the inner surface shape.

As the transfer foil pressing guide means 83 is arranged to move up and down, the transfer foil 91 is pressed against the screen panel 3 satisfactorily at the time of bonding the transfer foil 91, and after the transfer foil 91 is adhered. Can peel the transfer film 92 automatically, and can perform the transfer operation smoothly.

At the start of the transfer of the transfer foil 91, the end of the transfer foil 91 is squeezed firmly to the skirt portion 10 by the transfer foil pressing means 84 (that is, there is no floating of the transfer foil), and subsequent thermoelectric In the adhesion | attachment with the yarn roller 53, a bubble does not generate | occur | produce between the transfer foil 91 and the screen panel 3, and favorable adhesion | attachment without wrinkles can be performed.

In the above-mentioned transfer apparatus 100, it is comprised so that the winding reel 82 may be arrange | positioned at the transfer foil pressurizing means 84 side, and the transfer foil 91 may be conveyed in the reverse direction to the moving direction of the thermal transfer roller 53. It is desirable to. Since the reel 82 is in a stationary state when the transfer foil 91 is set to the screen panel 3, the transfer foil 91 at the time of setting by disposing the take-up reel 82 on the transfer foil pressurizing means 84 side. ) Is not shifted when the transfer foil pressing means 84 is pressed, so that the upper end position of the transfer foil element (that is, the transfer layer 93) at the time of transfer foil set can be accurately positioned. . For this reason, the transfer foil element 93 can be transferred exactly to the predetermined position of the screen panel 3 without position shift.

Moreover, it is also possible to arrange | position the supply reel 81 and the winding reel 82 so that the arrangement | positioning relationship may be reversed to the example shown. In addition, the same effects as those of the sheet type transfer device 51 are achieved.

According to the transfer method according to the present embodiment using the transfer apparatuses 51 and 100 described above, while using the heat transfer roller 53, the pressure applied by the main cylinder 54 is absorbed by the pressure control cylinder 55 Since the transfer foils 90 and 91 are transferred onto the screen panel 3 while controlling the transfer pressure of the heat transfer roller 53, the transfer foils 90 and 91 are uniformly applied to the respective portions of the screen panel 3. The transfer layer from can be transferred.

With respect to the screen panel 3 having the skirt portion 10 on at least one side, if the heat transfer roller 53 is moved from the skirt portion 10 side to the other side, the transfer foils 90 and 91 do not generate wrinkles. ), The transfer layers from the transfer foils 90 and 91 can be uniformly transferred.

The rotational position of the cutout 62 provided on the heat transfer roller 53 is detected, and the cutout 62 is transferred to the skirt 10 of the screen panel 3 so as to transfer the transfer foils 90 and 91. Since the start of the transfer can be precisely aligned.

The transfer devices 51 and 100 of the present embodiment can be applied not only to the transfer of the fluorescent surface but also to the transfer of other desired transfer layers.

The transfer apparatuses 51 and 100 and the transfer method of the present embodiment are particularly suitable for application to transfer to a three-dimensional curved surface where the screen panel is not flat, such as a flat cathode ray tube.

According to the transfer foil according to the present invention, since at least a phosphor layer, a reflective layer, and an electrode layer are formed on the transfer substrate by stacking, the transfer foil can be used to form a fluorescent surface by batch transfer, and the quality of each film constituting the phosphor surface Uniformity can be secured.

When the transfer foil is laminated with the phosphor layer, the reflective layer, and the electrode layer, and the reflective layer is formed inside the periphery of the phosphor layer, the transfer layer is thermally transferred to the panel using the transfer foil so that the reflective layer does not protrude from the phosphor layer. The fluorescent screen with good image visibility, that is, display quality can be produced.

When the reflective layer is formed of a white inorganic material layer, it is possible to produce a fluorescent surface having good display quality, in which the periphery of the image is not displayed like a white frame.

When the reflective layer is formed of a titanium oxide layer, it has a high refractive index and has a higher reflection efficiency, resulting in higher luminance of the screen. In addition, the fluorescent surface can be produced at low cost.

When the reflective layer is formed of an aluminum layer, it is possible to produce a fluorescent surface having good display quality without displaying a glowing frame around the image.

When the electrode layer is formed of a mixed material of the electrode component and the adhesive component, the adhesive layer can be omitted, the number of layers constituting the transfer foil can be reduced, and the number of manufacturing steps of the transfer foil can be simplified.

When the transfer foil is constituted by lamination of the phosphor layer and the reflective layer imparted with conductivity, the electrode can be omitted so that the film structure of the transfer foil can be simplified. In addition, by forming the reflective layer inside the periphery of the phosphor layer, it is possible to produce a fluorescent surface having good visibility of the display image, that is, display quality.

According to the flat cathode ray tube according to the present invention, since the fluorescent surface is formed of the electrode layer, the reflective layer and the phosphor layer by transfer from the transfer foil, the uniformity of each film quality constituting the fluorescent surface can be ensured, and the image display quality is stable. A flat cathode ray tube can be provided.

When the reflective layer is formed inside the periphery of the phosphor layer on the fluorescent surface, the visibility of the display image, that is, display quality, can be improved without protruding the reflective layer to display unnecessary frames around the image.

When the reflective layer is formed of a white inorganic material layer, the periphery of the image is not displayed like a white frame, and the display quality can be improved.

When the reflective layer is formed of a titanium oxide layer, the reflection efficiency is increased, and a high brightness screen can be obtained. Fluorescent surface can be comprised cheaply.

When the reflective layer is formed of an aluminum layer, the display quality can be improved without displaying a glowing frame around the image.

When the fluorescent surface is composed of a reflecting layer and a phosphor layer provided with conductivity, the electrode layer can be omitted to simplify the film structure of the fluorescent surface. Further, by forming the reflective layer inside the periphery of the phosphor layer, the visibility of the display screen, that is, the display quality, can be improved.

According to the manufacturing method of the flat cathode ray tube which concerns on this invention, a fluorescent surface makes uniform the film | membrane of each layer, and is produced by batch transfer. Therefore, a flat cathode ray tube with good quality of the fluorescent surface can be easily manufactured.

By using a transfer foil formed by laminating a phosphor layer, a reflective layer, and an electrode layer on a transfer substrate, a fluorescent surface is produced on the inner surface of the screen panel by a transfer method collectively, so that a fluorescent surface manufacturing process can be shortened and each layer constituting the fluorescent surface. The film quality can be made uniform. Therefore, highly reliable flat cathode ray tube can be manufactured easily.

When using a transfer foil in which a phosphor layer, a reflection layer, and an electrode layer are laminated as the transfer foil and a reflection layer is formed inside the periphery of the phosphor layer, a flat cathode ray tube with improved visibility of display image, that is, display quality, can be easily manufactured. .

When using a transfer foil having a reflective layer formed of a white inorganic material layer, it is possible to produce a flat cathode ray tube with good display quality in which the periphery of the image is not displayed like a white frame.

When using a transfer foil having a reflective layer formed of a titanium oxide layer, a fluorescent surface having high reflection efficiency and high brightness can be formed, and a flat cathode ray tube with good display quality can be manufactured.

When using a transfer foil having a reflective layer made of an aluminum layer, a flat cathode ray tube with good display quality without displaying a shiny frame around an image can be produced.

When using a transfer foil formed by stacking a phosphor layer and a reflecting layer imparted with conductivity, the electrode layer can be omitted to form a simplified phosphor surface having a film structure. Further, by using the transfer foil in which the reflective layer is formed inside the periphery of the phosphor layer, a flat cathode ray tube with improved visibility of the display image, that is, display quality can be easily manufactured.

Claims (30)

A transfer foil comprising at least a phosphor layer, a reflection layer formed inside a periphery of the phosphor layer, and a layer formed of a white inorganic material layer, and an electrode layer on a transfer substrate. delete delete The method of claim 1, The reflective foil is formed of a titanium oxide layer. The method of claim 1, Transfer foil, characterized in that the adhesive layer is formed on the electrode layer. delete delete The method of claim 1, The said electrode layer is formed from the mixed material of an electrode component and an adhesive component, and has an adhesive function, The transfer foil characterized by the above-mentioned. delete delete A transfer foil comprising at least a phosphor layer and a reflective layer formed on the inner side of the phosphor layer and imparting conductivity to the transfer substrate by lamination. delete On the inner surface of the panel, an electrode layer, a reflecting layer and a phosphor layer by transfer from a transfer foil are formed by lamination, and the reflecting layer is formed inside the periphery of the phosphor layer and is formed of a white inorganic material layer. . delete delete The method of claim 13, And the reflecting layer is formed of a titanium oxide layer. A flat cathode ray tube, wherein a reflection layer and a phosphor layer imparting conductivity by transfer from a transfer foil are formed on the inner surface of the panel, and the reflection layer is formed inside the periphery of the phosphor layer. delete On a transfer substrate, a transfer foil comprising at least a phosphor layer, a reflection layer and an electrode layer formed inside the periphery of the phosphor layer and formed of a white inorganic material layer, is laminated, The electrode layer side of the transfer foil is heated and pressed to the inner surface of the panel, and the transfer substrate is peeled off to transfer the phosphor surface comprising the phosphor layer, the reflective layer and the electrode layer. Method for producing a flat cathode ray tube, characterized in that. delete delete The method of claim 19, The reflective layer of said transfer foil is a titanium oxide layer, The manufacturing method of the flat cathode ray tube characterized by the above-mentioned. The method of claim 19, A method of manufacturing a flat cathode ray tube, characterized by using a transfer foil having an adhesive layer laminated on the electrode layer. delete delete The method of claim 19, The said electrode layer is formed of the mixed material of an electrode component and an adhesive component, and uses the transfer foil which has an adhesive function, The manufacturing method of the flat cathode ray tube characterized by the above-mentioned. delete delete At least a phosphor layer and a reflecting layer imparting conductivity are formed on the transfer substrate, and a transfer foil having the reflecting layer formed inside the periphery of the phosphor layer is prepared. The reflective layer side of the transfer foil is heated and pressed to the inner surface of the panel, and the transfer substrate is peeled off to transfer the fluorescent surface composed of the phosphor layer and the reflective layer. Method for producing a flat cathode ray tube, characterized in that. delete