JPH06162971A - Luminous element - Google Patents

Abstract

PURPOSE:To enable an inorganic filter to be properly fitted to the front panel of a vacuum envelope without any adverse effect on a phosphor screen by constituting the panel of substrate glass for bonding and mounting the filter and cover glass. CONSTITUTION:A phosphor screen section and each electrode group of an anode, a cathode, a grid and a back electrode are laid in a vacuum envelope made of a front panel 2A, a rear panel and a cylindrical side plate, thereby constituting a luminous element. The front panel 2A is constituted of substrate glass 2, and cover glass 22. An inorganic filter 15 is bonded and laid between the glass 21 and 22, and integrated therewith. Also, a plurality of phosphor screens 5G, 5B and 5R are formed on the formation side 2b of the substrate glass 21, thereby forming a fluorescent character display section 5. According to this construction, the inorganic filter 15 can be properly mounted without any adverse effect on the phosphor screens 5G, 5B and 5R, and a luminous element of high quality and reliability can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting element which constitutes a pixel of a large screen color display device.

[0002]

2. Description of the Related Art FIG. 2 shows a basic structure of a display tube for a light source as a conventional light emitting element of this type.
Is a plan view, FIG. 3B is a cross-sectional view taken along line AA ′ of FIG.
FIG. 3 is an exploded perspective view of the multi-cell in which a phosphor screen having R (red), G (green) and B (blue) phosphors as one pixel is arranged in a matrix of 3 × 3 pixels with the number of pixels being the number of pixels. The type of light source display tube will be described. In these figures, reference numeral 1 denotes a vacuum envelope as a glass tube which is hermetically sealed by a front panel 2, a rear panel 3 and a tubular side plate 4, and an inner surface of the front panel 2 has a three-color phosphor R. , G, B are applied as a unit pixel in a matrix to form a fluorescent display portion 5 composed of 3 × 3 pixel fluorescent screens 5R, 5G, 5B. Phosphor screen 5 here
The subscripts of R, 5G, and 5B correspond to red (R), green (G), and blue (B), respectively. Reference numeral 6 denotes an anode electrode group composed of a plurality of accelerating anodes 6 ₁ , 6 ₂ ... Arranged correspondingly around the respective fluorescent screens 5R, 5G, 5B of the fluorescent display section 5 and for accelerating these. A high voltage is applied to the anodes 6 ₁ , 6 _2, ... Via the external terminal 13. Reference numeral 7 denotes a cathode electrode group in which electron emission cathodes 7 _{11 to} 7 ₃₃ (not shown) are independently arranged in correspondence with the respective fluorescent screens 5R, 5G and 5B of the fluorescent display section 5. Both ends of each of the cathodes 7 _{11 to} 7 ₃₃ are supported between a pair of supports fixed on the rear panel 3. In the cathodes 7 _{11 to} 7 ₃₃ , the first and second subscripts correspond to the first to third rows and the first to third columns, respectively. In addition,
Each cathode 7 _{11-7 33,} for example, a straight thermal coated with oxide oxide coated indirectly heated or tungsten on the Ni sleeve can be used.
Reference numeral 8 denotes a grid electrode group including row selection control grids 8 ₁ to 8 ₃ arranged between the cathode electrode group 7 and the fluorescent display portion 5, and these control grids 8 ₁ to 8 ₃
Numeral 8 ₃ is an electron passage hole for passing the electron beam 11 from the cathodes 7 _{11 to} 7 ₃₃ as a non-focused beam in the row direction corresponding to each of the fluorescent screens 5R, 5G and 5B of the fluorescent display unit 5. 9 _{1 to} 9 ₃ are provided. Reference numeral 10 indicates the rear surface side of the cathode electrode group 7, that is, on the rear panel 3 forming a part of the vacuum envelope 1, the respective fluorescent screens 5R and 5R of the fluorescent display unit 5.
G, a back electrode group comprising a back electrode 101 to 103 for respectively oppositely disposed striped column selection to the column direction in response to 5B, these back electrode 10 ₁ to 1
0 ₃ is formed of a conductor layer such as Ag. And each back electrode 10 ₁ to 10 described above ₃ each cathode 7 _11-7
By applying a positive potential of the negative and 0V or several V with respect to ₃₃ of the potential, which is intended to control the electron beam 11 to be emitted from their cathode 7 _{11-7 33.} Reference numeral 12 is a lead pin as an external terminal for pulling out the respective electrodes such as the cathode electrode group 7, the grid electrode group 8 and the back electrode group 10 from the back panel 3 to the outside. The lead pin 12 is embedded in the back panel 3. It penetrates and is pulled out. Reference numeral 14 is a frit glass that joins the tubular side plate 4 to the front panel 2 and the rear panel 3 to form the vacuum envelope 1.

[0003]

In the conventional light source display tube having the above-described structure, the front panel 2 forming the vacuum envelope 1 has a main part enlarged cross section as shown in FIG. 4 (a). A structure in which an organic filter 15 is formed and arranged on the formation surface side of the fluorescent display portion 5 on which the respective phosphor screens 5R, 5G, 5B are formed, or the display surface side of the front panel 2 as shown in FIG. 4 (b). The organic filter 15 is formed and arranged in the structure. However, the inorganic filter 15 is
The baking temperature at which the frit melts and becomes vitreous is the phosphor screen 5.
It is close to the firing temperature of R, 5G, and 5B, and therefore, in the structure of FIG.
There is a problem in that the luminous efficiency of the phosphor screens 5R, 5G, 5B is significantly reduced by reacting with R, 5G, 5B. Also,
In the structure of FIG. 4 (b) described above, there is a problem that the inorganic filter 15 is softened when the phosphor screens 5R, 5G, 5B are fired and adhered to the firing tray 16 of the underlay.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to make it possible to securely attach an inorganic filter to a front panel without affecting the phosphor screen. It is to provide an element.

[0005]

In order to achieve the above object, in the light emitting device according to the present invention, a front panel constituting a vacuum envelope is composed of a substrate glass and a cover glass, and the substrate glass and the cover glass are provided. An inorganic filter is bonded and arranged between the glass and the glass to be integrated.

[0006]

In the front panel of the present invention, the inorganic filter is adhesively arranged between the substrate glass and the cover glass, and the inorganic filter does not come into contact with other members.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a front panel showing a structure according to an embodiment of a light emitting device of the present invention. In the figure, a front panel 2A constituting the vacuum envelope 1
Is a transparent substrate glass 2 ₁ and a transparent cover glass 2 ₂
The inorganic filter 15 is sandwiched between and to be bonded and arranged.
The upper surface side of the ₂ forms the display surface side 2a of the fluorescent display portion 5, the lower surface side of the glass substrate 2 ₁ are respectively formed a forming surface 2b of the fluorescent display portion 5. Further, on the inside of the substrate glass 2 _1, a phosphor screen 5R at a predetermined position, respectively, 5G, 5B is formed fluorescent display 5 has a configured structure.

The front panel 2A thus constructed is
The inorganic filter 15 is placed on the substrate glass 2 ₁ , the cover glass 2 ₂ is placed further on it, and the substrates are placed on the above-mentioned firing tray 16, and the firing temperature is about 450 ± 50 in the heating furnace. By subjecting the inorganic filter 15 to heat treatment at ° C, the substrate glass 2 ₁ and the cover glass 2 ₂ are bonded and integrated with each other as an adhesive.

According to this structure, the substrate glass 2 ₁
Since the inorganic filter 15 is arranged between the cover glass 22 and the cover glass 2 ₂ , it does not come into contact with the fluorescent screens 5R, 5G, 5B and is not adhered to the baking tray 16, and the front surface The inorganic filter 15 can be reliably provided on the panel 2A.

In the above-described embodiment, the front panel 2A has a laminated structure in which the inorganic filter 15 is arranged on the substrate glass 2 ₁ and the cover glass 2 ₂ is further arranged on the inorganic filter 15. has been described, the present invention is not limited thereto, using a SiO ₂ thin film instead of the cover glass 2 ₂ (coating) and high-temperature baking frit glass film (sintering temperature 550 ± 50 ° C.) It goes without saying that it is okay.

[0011]

As described above, according to the present invention,
The front panel is composed of a substrate glass and a cover glass, and an inorganic filter is adhered and arranged between the substrate glass and the cover glass so that the front panel can be integrated into the front panel without affecting the fluorescent screen. Since the inorganic filter can be securely attached, it has an extremely excellent effect that a light emitting element having high quality and reliability can be obtained.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a front panel showing a configuration of an embodiment of a light emitting device according to the present invention.

FIG. 2A is a plan view showing a basic structure of a conventional light source display tube, and FIG. 2B is a sectional view taken along line AA ′.

FIG. 3 is an exploded perspective view of a part of FIG.

FIG. 4 is an enlarged cross-sectional view of a main part of a front panel for explaining the problems of the conventional light source display tube.

[Explanation of symbols]

1 Vacuum Enclosure 2A Front Panel 2 ₁ Substrate Glass 2 ₂ Cover Glass 2a Display Surface Side 2b Forming Surface Side 3 Back Panel 4 Cylindrical Side Plate 5 Fluorescent Display Section 6 Anode Electrode Group 6 ₁ Acceleration Electrode 6 ₂ Acceleration Electrode 6 ₃ Accelerating electrode 7 Cathode electrode group 8 Grid electrode group 10 Back electrode group 11 Electron beam 12 Lead pin 13 External terminal 14 Frit glass 15 Inorganic filter 16 Firing tray

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shunichi Futashi, 6-14 Maruo-cho, Nagasaki-shi, Nagasaki Mitsubishi Electric Corporation Nagasaki Works (72) Inventor Kozaburo Shibayama 6-14, Maruo-cho, Nagasaki-shi, Nagasaki No. Mitsubishi Electric Corporation Nagasaki Works

Claims (1)

[Claims] 1. A vacuum envelope in which a front panel is attached to a front surface of a tubular side plate and a back panel is attached to a rear surface of the tubular side plate in an airtight manner, and a fluorescent display portion formed by arranging fluorescent surfaces in a matrix on an inner surface of the front panel. An anode electrode group composed of a plurality of accelerating anodes arranged around the phosphor screen, a cathode electrode group in which electron emission cathodes are arranged independently corresponding to the phosphor screen, and the cathode electrode A plurality of electron passage holes, which are arranged between the group and the fluorescent display portion in a row or column direction corresponding to each fluorescent surface of the fluorescent display portion and through which electrons from each cathode pass as an unfocused beam. A grid electrode group consisting of control grids, and a back electrode consisting of a plurality of back electrodes arranged in the column or row direction on the back side of the cathode electrode group corresponding to each phosphor screen of the fluorescent display unit. An electrode group, wherein the intersection of each control grid of the grid electrode group and each back electrode of the back electrode group forms a matrix, wherein the front panel forming the vacuum envelope is a substrate glass. And a cover glass, and an inorganic filter is adhesively arranged between the substrate glass and the cover glass so as to be integrated with each other.