JPH073621B2 - Fluorescent display device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fluorescent display device in which a large number of high-luminance light-emitting display cells are two-dimensionally arranged for display.

[Outline of Invention]

The present invention provides a fluorescent display device in which a plurality of display cells of high-luminance light emission are combined to form one unit, and a large number of these units are two-dimensionally arranged, one unit for each unit or for each unit. By connecting a power supply and inserting one protective resistor between the power supply and each display cell, which breaks when the display cell is abnormal (that is, when an excessive current flows), the display cell is internally discharged. Even when short-circuited, the power supply is prevented from being destroyed and other display cells supplied from the same power supply are not affected.

[Conventional technology]

For example, a large-sized display device has been proposed in which a large screen is obtained by arranging a large number of light-emitting display cells having a so-called phosphor trio composed of phosphor layers of three colors of red, green and blue.

In this display device, a plurality of display cells are combined to form one unit, and a large number of these units are combined.

[Problems to be solved by the invention]

Since such a display device requires a high-voltage power supply, a large current flows when an internal discharge occurs in the display cell, causing the display cell to be destroyed, and may also cause the destruction of other display cells that are continuously adjacent to each other. Therefore, for example, one 1st protection resistor is inserted in 1 unit, and 1 is added to 4 display cells.
It has also been proposed to insert two second protective resistors,
Also in this case, the destruction of one display cell often destroys the first protection resistor and one unit does not emit light.

The present invention solves the above-mentioned problems and provides a fluorescent display device which is easy to handle.

[Means for solving problems]

The present invention includes a cathode K, a first grid G ₁ and a second grid G _2, and a fluorescent display segment (14R) (14G) (14B).
A plurality of display cells (71) (or (71 '), (10)) having a plurality are arranged in a matrix to form one unit (166).
And a plurality of the units (166) are arranged in a matrix, and each display cell (71) (or (71 '), (10)) and a high-voltage power supply (171). A protective resistor (173) having a structure that breaks (so-called disconnection) when an excessive current flows in each display cell is inserted between them.

The high voltage power supply (171) is equipped in one unit, for example,
Alternatively, one unit may be installed in a plurality of units, and as shown in FIG. 56, between the high voltage power source (171) and each display cell (eg, display cell (71)) in the unit, the protective resistor (17
3) is inserted.

In the display cell, a plurality of fluorescent display segments (14R) (14G) (14B) composed of fluorescent layers of three colors, for example, red, green and blue are adhered and formed on the inner surface of the front panel of the glass enclosure. opposite each display segment three cathodes (K _R)
(K G) _{(K B)} and a first grid (control electrode)
(G _1R ), (G _1G ), (G _1B ), and a common second grid (accelerating electrode) (G ₂ ) are arranged, and electron beams from each cathode (K) irradiate the corresponding display segment. However, it is configured to emit light. In this case, as the display cell, as shown in FIG. 1 and FIG. 2 or FIG. 34 and FIG. 35, a display cell having a plurality of sets of fluorescent trio (7
1) (71 '), or 1 as shown in Figs. 67 and 68
A display cell (10) or the like having a set of fluorescent trios may be used. Then, a plurality of display cells (71) (or (71 '),
(10)) are combined to form one unit, and a large number of these units are combined in an XY matrix to form a display device.

[Action]

When an internal discharge occurs in the display cell and a large current flows, the protection resistor (173) causes a voltage drop to protect the display cell. Further, when an excessive current flows, the protective resistor (173) connected to the display cell is disconnected to prevent the power supply from being destroyed and only the display cell stops emitting light. The other display cells in the unit emit light without being affected.

〔Example〕

Hereinafter, embodiments of the fluorescent display device according to the present invention will be described in detail with reference to the drawings.

FIG. 1, FIG. 2 and FIG. 3 show a front view, a side view and a perspective view, respectively, showing a fluorescent display tube according to the present invention, that is, a unit display cell with one part broken.

In the figure, (11) is a front panel (11A) and a rear panel (11A).
The glass enclosure consisting of B) and the side plate (11C) is shown. This glass enclosure (11) is, for example, vertically 4 in the front panel (11A).
It is formed in a size of 1 mm x 86 mm. This glass case (1
1) a fluorescent display section which is a plurality of pairs of picture elements each consisting of a fluorescent layer, that is, eight sets of so-called fluorescent trio (12) [(12
a), (12b), (12c), (12d), (12e), (12f),
(12g), (12h)] and eight pairs of electrode units (13) [(13a), (13) corresponding to each of the fluorescent trio (12).
b), (13c), (13d), (13e), (13f), (13g),
(13h)] are arranged facing each other.

Eight sets of fluorescent trios (12) are formed by applying a fluorescent layer to the inner surface of the front panel (11A), and four sets are set up and down.
Arranged in rows, where each trio of phosphors (12) is composed of three fluorescent display segments, namely the fluorescent layers (14R), (14G) and (14B), which emit red, green and blue light. To be done. Specifically, as shown in FIG. 8, a carbon layer (15), which is a conductive layer, is printed in a frame shape on the inner surface of the front panel (11A), and each of the red fluorescens corresponding to each void in the frame shape. The phosphor layer (14R), the green phosphor layer (14G), and the blue phosphor layer (14B) are formed by printing so as to partially extend over the carbon layer (15), and an intermediate film is provided on the front surface thereof. As a result, a metal back layer (16) made of, for example, aluminum is deposited. And
In this case, in the fluorescent trio (12), the red fluorescent layer (14R) is arranged at the center, and the green fluorescent layer (14G) and the blue fluorescent layer (14B) are arranged at both ends, respectively. The two rows are arranged the same (see Fig. 13). It should be noted that, as shown in FIG. 14, the green phosphor layer (14G) and the blue phosphor layer (14B) can be arranged in left and right in opposite directions.

An electrode unit (13) is arranged on the rear panel (11B) side so as to face each of the phosphor trios (12). The electrode unit (13) includes red phosphor layers (14R), green phosphor layers (14G) and blue phosphor layers (14) of the phosphor trio (12).
3 wire cathodes (K) facing B)
[(K _R ), (K _G ), (K _B )] and three wire grids (K _R ), (K _G ), (K _B ), each of which has three first grids (G ₁ ) [G ₁ ] [ (G _1R ), (G _1G ),
(G _1B )] is arranged, and further the second grid (G ₂ ) is arranged commonly to the three first grids (G ₁ ).

The specific assembly and configuration of this electrode unit (13) is the fourth
This is as shown in FIGS. That is, as shown in FIG. 4, it has three rectangular openings (1), and each opening (17)
An insulating substrate, for example, a ceramic base (19) having a pair of terminal pins (18a) and (18b) penetratingly planted is provided at a position sandwiching. The E-shaped conductive support pieces (20a) and (20b) paired with the terminal pins (18a) and (18b) of this pair are spot welded in common, that is, one of the conductive support pieces (20
a) is commonly spot-welded to the three terminal pins (18a) of one row, and the other conductive support piece (20b) is commonly spot-welded to the three terminal pins (18b) of the other row. , each conductive support piece (20a) and (20b) each wire cathode between _{(K G), (K R} ), (K B) is stretched. One support piece (20a) fixes one end of the wire cathode (K), and the other support piece (20b) is provided with a spring portion (21) having a bent tip. ), The other end of each wire cathode (K) is fixed. As a result, even if the wire cathode (K) expands due to temperature rise, the expansion is absorbed by the spring portion (21) and the wire cathode (K) does not loosen. (22) is a terminal led out from the support piece (20a). Each wire cathode (K) is formed, for example, by coating a surface of a tungsten heater with a carbonate serving as an electron emitting substance.

Next, each first grid, (G _1G ), (G _1R ), (G _1B ).
Are supported by the openings (17) of the ceramic base (19). Each first grid (G _1G ), (G _1R ), (G _1B ) has a curved kamaboko having a cylindrical surface facing each wire cathode (K _G ), (K _R ), (K _B ). A plurality of slits (23) are formed on the cylindrical surface at a predetermined pitch along the longitudinal direction, and each of the curved ends has a leg portion (width approximately equal to the width of the opening portion (17)). twenty four)
And (25) are provided. The legs (24) and (25) are inserted into the opening (17) of the ceramic base (19), but at this time, the legs (24) and (25) are inserted so as to narrow in the opposite direction. As a result, both legs (24) and (25) come into pressure contact with the inner wall of the opening (17) by the force of returning to the original position of both legs after insertion, thereby temporarily supporting them. One leg (24) is long because it is used for a terminal, and the other leg (25) is formed short so that when inserted into the opening (17), one leg (24) has an opening. It penetrates through (17), and the other leg part (25) is made to stop in an opening part (17).

On the other hand, the casing (26) of the electrode unit is provided. The housing (26) constitutes a part of the second grid (G ₂ ), is made of a conductive material, and has three openings (27) [(27G) facing the first grid (G ₁ ) on the front surface. ), (27R), (27
B)] is provided, and a separator (28) for partitioning the openings (27) from each other is integrally extended inward. This casing (26) is barrel-polished by drawing, and has a structure that does not easily discharge. A common second grid (G ₂ ) is inserted and arranged in the housing (26). The second grid (G ₂ ) is the first grid (G _1G ) (G _1R ), (G _1B ).
The slit (23) of the first grid (G ₁ ) in the area corresponding to
Slit mesh part (29G) at the same position as
(29R) and (29B) are formed. In this case, a groove (30) through which the separator (28) is inserted is provided between the mesh portions (29G), (29R), (29B). And each slit part (29G), (29R), (29B) has an opening (27
The second grid (G ₂ ) is arranged in the enclosure (26) so as to face the G), (27R) and (27B) and the separator (28) is inserted into the groove (30). The second grid (G ₂ ) is spot-welded to a part of the housing (26) and is mechanically and electrically connected to the housing (26).
6) will also serve as the second grid (G ₂ ).

Next, a pair of insulative separators (31A) and (31B) are inserted along one of the facing inner wall surfaces of the casing (26). The inner surfaces of the separators (31A) and (31B) have three groove parts (3) into which the side parts of the first grid (G ₁ ) can be fitted.
2) [(32G), (32R), (32B)] are provided.
(33) is a through hole. This separator (31A), (31B)
When each is inserted into the housing (26), it is inserted into the gap between the wall portion of the housing (26) and the separator (28) and is held by being held therebetween. The upper ends of the separators (31A) and (31B) are the second
Abut the grid (G ₂ ).

Then, the ceramic base (in which the wire cathode (K) and the first grid (G ₁ ) are attached in the casing (26) in which the second grid (G ₂ ) and the separators (31A) and (31B) are assembled in this way ( 17) with separators (31A), (3
1B) Inserted with the rear end faces facing each other. At this time, both ends of each of the first grids (G _1G ), (G _1R ), and (G _1B ), respectively, have grooves (32G), (3G) of the separators (31A), (31B).
2R), (32B). Therefore, each first grid (G
₁ ) has legs (24), (25) with ceramic base (1
The positioning is accurately performed by inserting the opening (17) in 9) and fitting both side portions of the first grid into the groove portions (32) of the separators (31A) and (31B). In addition, a terminal (22) bent and extended from one support piece (20a) on which the wire cathode (K) is stretched passes between the ceramic base (19) and the separator (31a) and the casing (2).
It is led out through the notch of 6). Next, one frame-shaped retainer (34A) of the retainer structure (34) made of a conductive material is fitted into the housing (26) to form a bent portion (34a) of the retainer (34A). The ceramic base (19) is held by spot welding with the casing (26) to form the electrode unit (13) shown in FIGS. 5 to 7.

As shown in FIG. 4, the conductive retainer structure (34) can be retained in each of the retainers (34) that can enter the casings (26) of the four sets of electrode units.
A), (34B), (34C), and (34D) are integrally connected to each other by the conductive connecting portion (35), and this connecting portion (35) is just in the notch (95) of the housing (26). Configured to mate.
Reference numeral (36) is an attachment portion spot-welded to a lead frame (not shown), and (37) is an attachment portion attached to the glass casing (11). Therefore, each second of the four sets of electrode units (13)
The grids (G ₂ ) are electrically commonly connected to each other by the conductive retainer structure (34).

On the other hand, each pair of fluorescent layers (14
A separator structure (40) made of a conductive material as shown in FIG. 12 is arranged so as to surround R), (14G) and (14B). This separator structure (40) prevents the electron beam from the wire cathode from striking the first grid (G ₁ ) and the second grid (G ₂ ) so that secondary electrons from it do not emit light to the adjacent phosphor layer. It also has the function of spreading the electron beam from each wire cathode (K) so that the electron beam from each wire cathode (K) is irradiated to the entire corresponding phosphor layer (14), that is, forming a so-called diffusion lens. ,
At the same time, it is used as a power supply means for applying a high voltage, for example, 8 KV, to each phosphor trio (12). When assembled, the separator structure (40) is supported, for example, between the front panel (11A) and the side plate (11C) of the glass housing (11) and fixed by a glass frit. That is, the separator structure (40) has a separator part (41) divided into three parts so that each color phosphor layer is surrounded by each of eight sets of the phosphor trio (12). The (41) is integrally connected to each other via the electrode plate (42), and the upper ends thereof are provided with supporting claws (43) protruding outward, respectively. Further, elastic bending pieces (44) for positioning are cut and raised on the side portions of the separator structure (40). Therefore, the separator structure (40) is attached to the side plate (11C) of the glass casing (11).
When it is inserted into the side plate from above, the supporting claw (43) just comes into contact with the upper end surface of the side plate (11C) to support the separator assembly (40), and at the same time, the bending piece (44) is attached to the inner wall of the side plate (11C). The separator structure (40) is held in place by abutting. Further, a protrusion (45) (see FIG. 8) is provided on a portion of the separator structure (40) corresponding to the electrode plate, and the protrusion (45) accommodates the separator structure (40) in the side plate (11C). When the front panel (11A) is superposed on the side plate (11C) and sealed, it is just in contact with the metal back layer (16) or the carbon layer (15). This allows the high voltage from the high voltage terminal or anode lead (46) to be supplied to each phosphor trio (12) in common. As shown in FIG. 8, one end of the anode lead (46) to which a high voltage is applied is connected to the electrode plate (42) of the separator assembly (40) and the other end thereof is a glass back panel (11B). ) Is exhausted to the outside through an exhaust pipe (tip-off pipe) (47) attached to (). At this time, the anode lead (46) is made of glass-wrapped Dumet wire (Cu alloy) around the exhaust pipe (47). Therefore, the airtightness between the anode lead (46) and the exhaust pipe (47) is maintained.

A high-pressure cover or an insulating cylinder body (101) for mechanically protecting the exhaust pipe (47) is fixed to the outside of the exhaust pipe (47) via a resin molding material (adhesive) (102). Body (1
The anode lead (46) is electrically connected to the high voltage terminal washer (103) arranged at the end of 01). In this case, the washer (103) for terminals is arranged in the recess (104) formed at the end of the insulating cylinder (101), and the cross-shaped notch (105) is formed at the center. The anode lead (46) is press-fitted and penetrated in the center of 105), whereby the anode lead (46) and the washer (103) for terminals are electrically connected without soldering (see FIG. 9). Then, a connecting means (so-called socket) (107) connected to an external high voltage lead (106) extended from a high voltage power source (described later) is fitted in the insulating cylinder, and a spring (108) is attached to the washer (103) for the terminal. The external lead (106) is electrically connected via the, and the anode voltage is supplied to the anode lead (46). The connecting means (107) has, for example, a spring connected to the external high voltage lead (106) and an engaging portion (109) for insulating and protecting the spring from the outside and engaging with the outside of the insulating cylinder (101). The insulating cap (110) is made of silicon rubber, and the insulating cap (110) can be attached to and detached from the insulating cylinder (101). Reference numeral (111) is an air hole for accelerating the curing of the resin mold material (102) provided in the insulating cylinder (101).
Further, the inner wall of the recess (104) in which the washer (103) is arranged is formed so that the diameter thereof becomes large toward the end, and the spring (108) is guided by the slanted inner wall to the washer (103). Be sure to be contacted. On the connecting means (107) side, the spring (10
8) is positioned by the small diameter part (112) in the cap (110). In this way, the exhaust pipe (47) from which the anode lead (46) is led out is mechanically protected by the insulating cylindrical body (101), so that the exhaust pipe (47) that is mechanically weak when connecting with the external high voltage lead (106) ( 47) is not damaged. Further, the spring (108) is brought into contact with the terminal washer (103) to electrically connect the anode lead (46) and the external lead (106), so that the direct load on the anode lead (46) is reduced. It

As shown in FIG. 10, a rising portion (112) is provided at a part of the outer edge of the washer (103) for terminals, and the external lead (106) is directly soldered to the connecting portion and the insulating cylinder. (Ten
It is also possible to cover 1) with a resin mold body (113). However, in this case, a socket (114) for connecting to the high-voltage power supply side is provided at the tip of the external lead (106). Further, as shown in FIG. 11, the anode washer (46) was soldered to the terminal washer (103), and the external lead (10) was connected to the terminal washer (103) via the spring (108).
6) can also be configured to be detachably connected. In the electrode unit (13), eight sets of the electrode units (13a) to (13d) are provided in four sets each having a common retainer structure (3
After being fixed by 4), the lead frame (60) is placed at a predetermined position, and the mounting portion (36) of the retainer structure (34) and the lead frame (60) are spot-welded. After that, the terminal pin (18) of the wire cathode (K), the leg portion (24) of the first grid (G ₁ ) and the electrode units (13a) to (13d).
The side retainer structure (34) and the corresponding lead portions of a predetermined lead frame are connected to each other via, for example, a lead wire (not shown). At this time, the second grid (G ₂₎ each other, and four pairs of electrode units (13e of the second grid as described above (G ₂₎ is 4 pairs of electrode units arranged in the transverse direction (13a) ~ (13d) ) To (13h), the second grid (G ₂ ) comrades are commonly connected by the retainer structure (34).
The first grid (G ₁ ) is between two electrode units arranged in each longitudinal direction, that is, between the electrode units (13a) and (13e),
Between the electrode units (13b) and (13f), the electrode unit (13
Common connection is made between c) and (13g) and between electrode units (13d) and (13h). That is, among the vertically arranged electrode units, the central G _1R comrades are commonly connected, the right end (G _1B ) comrades are commonly connected, and the left end (G _1G ) comrades are commonly connected. Furthermore, the wire cathodes (K) are connected in series in this example. In addition, in the fluorescent trio (12), when the green fluorescent layer (14G) and the blue fluorescent layer (14B) are arranged side by side in the opposite direction (in the case of FIG. 14), (G _1R ) are connected in common, (G _1B ) and (G _1G ) on the right end are connected in common, and (G _1G ) and (G _1B ) on the left end are connected in common.

Then, the lead of the wire cathode (K), the lead of the first grid (G ₁ ) and the lead of the second grid (G ₂ ) are respectively located from one side of the glass casing (11) to the rear panel (11B) and side plate (1).
1C) is led out to the outside through a sealing portion between the lower end surface of 1C).

(61F) is a wire cathode lead, (62G ₂ ) is a second grid (G ₂ ) lead commonly connected between the electrode units (13e) to (13h), and (63G ₂ ) is an electrode unit (13a) to
The leads of the second grid (G ₂ ) commonly connected between (13d) and (64G ₁ ) are those of the three first grids (G ₁ ) 4 commonly connected between the electrode units (13a) and (13e). Reed, (65
G ₁ ) is a lead of the three first grids (G ₁ ) commonly connected between the electrode units (13b) and (13f), and (66G ₁ ) is commonly connected between the electrode units (13c) and (13g). The three first grid (G ₁ ) leads (67G ₁ ) are the three first grid (G ₁ ) leads commonly connected between the electrode units (13d) and (13h). The number of leads led out from the glass casing (11) is appropriately set according to the design.

The electrode units (13a) to (13d) and the electrode units (13e) to (13h) held by the retainer structure (34).
When mounting the glass housing (11), attach the mounting parts (37) at both ends of the retainer structure (34) to the rear panel (11B) and the side plate (11C).
It is fixed so that it is sandwiched between them. In this case, since the retainer structure (34) holding the four sets of electrode units is fixed because it is fixed only at both ends, the electrode units may be displaced from a predetermined position. In order to prevent this, as shown in FIG. 15, a common L-shaped auxiliary member (68) is integrally provided on the side surface of the four sets of electrode units, and both ends of this auxiliary member (68) are also attached. It can also be fixed between the rear panel (11B) and the side plate (11C) via the part (69). At this time, the auxiliary member (68) is made of a conductive material. The auxiliary member (68) prevents the retainer structure (34) from warping and tilting and prevents the electrode unit (13) from being displaced. Further, as shown in FIG. 16, scattering of getter particles from the getter container (70) toward the fluorescent surface side is restricted. Further, the auxiliary member (68) is provided with the same potential as that of the second grid (G ₂ ) to prevent discharge. That is, the auxiliary member (68) prevents the anode electric field from seeping out to the low voltage side, and the separator structure (40) to which the anode voltage is applied and the low voltage side grids (G ₁ ),
Discharge between the (G ₂ ) lead and the cathode (K) lead is blocked.

Next, the operation of such a display cell will be described. Red, green and blue phosphor layers (14R) (14G) (14) of each phosphor trio (12)
An anode voltage of, for example, about 8 KV is supplied to B) through the anode lead (46). Also each 1st grid (G _1R )
A voltage of, for example, 0 to 5V or less is applied to each of (G _1G ) and (G _1B ), and for example, −15V to 50V is applied to the second grid (G ₂ ).
Voltage (so-called column selection voltage) is applied.

In this configuration, the voltage on the anode side is fixed, the column is selected by the voltage applied to the second grid (G ₂ ), and the on / off display is selectively performed by the voltage applied to the first grid (G ₁ ). It is something. That is, for example, 50 V is applied to the second grids (G ₂ ) of the upper row electrode units (13a) to (13d) and the lower row electrode units (13e) to
For example, when 5V is applied to the first grid (G ₁ ) through the lead (64G ₁ ) while the cutoff voltage of −15V is applied to the second grid (G ₂ ) of (13h), the first fold The photo-trio (12a) is selected, and the electron beam from the cathode (K) in the electrode unit passes through the first grid (G ₁ ) and is accelerated by the second grid (G ₂ ) so that the corresponding phosphor layer ( Hit 14R) (14G) (14B) to make it light up. At this time, the emission brightness is controlled by controlling the panel width (application time) of the voltage (5 V) applied to the first grid (G ₁ ).

Then, when 0 V is applied to the first grid (G ₁ ), the electron beam from the cathode is cut off and the corresponding phosphor layer does not emit light. And the lead (64G ₁ )
(65G ₁₎ (66G ₁₎ and (67G ₁₎ sequentially phosphor trio upper row by applying a voltage to the first grid (G ₁₎ through (12a) ~ (12d) is a light emitting display, and then second grid of switching under column voltage of the second grid (G ₂₎ to (G ₂₎
When 50V is applied and the voltages of the first grid (G ₁ ) are applied in the order of the leads (64G ₁ ) to (67G ₁ ), the fluorescent trios (12e) to (12h) in the lower row emit light.

The electron beam from the wire cathode (K) is spread by the first grid (G ₁ ) and the separator (41) and is applied to the entire surface of the phosphor layer (14). Further, the wire cathode (K) electron beam first grid (G ₁₎ from, per the second grid (G _2), first grid (G _1), second secondary electrons from the grid (G ₂₎ However, the secondary electrons are not blocked by the separator (28) of the casing (26) of the second grid and the separator (41) of the anode side and do not hit the adjacent fluorescent layer. In this way, by selectively controlling the voltages of the first grid (G ₁ ) and the second grid (G ₂ ), each phosphor trio (12) is sequentially luminescently displayed with high brightness.

In this fluorescent display cell (71), eight picture elements, that is, the phosphor trio (12) are compactly built in one cell, and therefore the picture elements are downsized as a whole.

Also, the three wire cathodes (K) and the second grid (G ₂ ) common to the first grid (G ₁ ) are unitized so that the unit casing (26) also serves as the second grid (G ₂ ). This electrode unit (12) is used for each fluorescent trio (12)
The display cell (71) is easily assembled and manufactured because the display cells (71) are arranged in correspondence with. Further, since the unit casing (26) that also serves as the second grid (G ₂ ) is formed by so-called drawing, the corners are rounded, the withstand voltage is increased, and accidents due to discharge are prevented.

Further, in the electrode unit (13), each first grid (G ₁ ) does not use spot welding or the like and the opening (17) provided in the ceramic base (19) and the insulating separator (31) are provided.
Since it is positioned and supported by the groove portions (32) of (A) (31B), the electrode unit (13) can be assembled in a sufficiently small size.

Further, when a large screen is formed by arranging a large number of display cells (71), the fluorescent trio (12) on the fluorescent surface is moved upward, downward, left,
Since the right side is arranged at an equal pitch, the adjacent display cells (7
Almost no gap can be made between 1) and the display cell (71). However, in this display cell (71), the anode lead (46) is located in the exhaust pipe (4) from the rear panel (11B) side of the glass casing (11).
Since it is derived through 7), the adjacent display cells (71)
Can be placed close to each other.

Furthermore, in 8 sets of fluorescent trio (12) on the fluorescent surface, red fluorescent layer (14R) is arranged in the center and green and blue fluorescent layers (14G) and (14B) are arranged on both sides. In particular, the apparent resolution can be increased when the arrangement of the green and blue phosphor layers (14G) and (14B) is changed between the upper row and the lower row.

Further, in the above example, the wire cathodes (K) in the eight sets of electrode units (13) are directly connected to each other. However, it is also possible to connect them in parallel as shown in FIG. Even if the wire cathode of one electrode unit is broken, the operation of the other electrode unit is maintained.

Further, the respective terminals of the electrode unit and the lead frame can be connected by a method of directly connecting the two without using lead wires. Particularly in the case of the wire cathode (K) terminal, the terminal (22) of the supporting piece (20a) can be bent and extended and directly connected to the lead frame.

Further, in the electrode unit (13) of the above example, the terminal pins (18a) and (18b) are erected on the ceramic base (19). For example, as shown in FIG. 19 and FIG.
It is also possible to omit a) and (18b). In FIGS. 19 and 20, the first grid (G ₁ ) is supported 3
Through holes (83a) and (83b) for supporting a pair of conductive support pieces (20a) and (20b) at positions sandwiching two openings (17), respectively.
A ceramic base (19) is formed. On the other hand, as a pair of conductive support pieces (20a) and (20b), support portions (84G) (84R) to which each wire cathode is attached are attached.
(84B) are connected to each other, and the rear end (85R) that serves as the lead of the central support portion is extended, and the rear ends (85G) and (85B) of both support portions (84G) and (84B) are It is folded back to have elasticity. Although the support portions (84G) (84R) (84B) of one conductive support piece (20a) are configured as fixed support portions, the other conductive support piece (20
The support parts (84G) (84R) (84B) of b) are formed as a spring part (21 ') as a whole by forming a notch in the base part. (86) is a conductive support piece (20a) and (20b)
This is a fall prevention unit. End support portion (84G) (84R) each wire cathode _{(K B)} of (84B) (K R) ( K G) is stretched, the cuts for perform center out of the wire cathode (K) is And has a bent shape. These supporting pieces (20a) and (20b) are respectively provided with through holes (83
a) and (83b) and folded back ends (85
G) (85B) after supporting the support pieces (20a) and (20b) on the ceramic base (19), then both support pieces (20a) and (20b)
Each wire cathode (K _G ) (K _R ) (K _B ) is laid between them. At this time, each lead (85R) is led out through the ceramic base (19). According to this structure, the terminal pins (18a) and (18b) can be omitted, and the number of parts forming the electrode unit (13) can be reduced.

21 and 22 show another example of the conductive support pieces (20a) and (20b) for supporting the wire cathode (K). In this example, the plate-like rear ends (85G) and (8G) of the support portions (84G) and (84B) on both sides of the conductive support pieces (20a) and (20b), respectively.
5B) is formed by immediately extending without folding back, and other than that is configured the same as in FIG. Then, the conductive support pieces (20a) and (20b) are inserted into the through holes (83a) and (83b) of the ceramic base (19), and then each plate-like member penetrating through the through holes (83a) and (83b). Rear end (85G) and (85B)
By twisting the end of
Easily fixed to the ceramic base (19).

23 and 24 show still another example of the conductive support pieces (20a) and (20b) for supporting the wire cathode (K).
In this example, the support (84
G) (84R) (84B) are connected to each other, and the connecting portion (8
8) Both support parts (84G) and (84B) so as to extend along
The lead (89) is formed further outward, and the rear ends (85G) (85R) (85B) of each support are perpendicular to both support pieces (20a).
Bent in the opposite direction of (20b), each rear end (85G)
A through hole (87) is provided in (85R) and (85B). On the other hand, the ceramic base (19) supports the first grid (G ₁ ) 3
Conductive support pieces (20a) at positions sandwiching the two openings (17)
And (20b) are provided with through holes (92). This through hole (92) just corresponds to the position of the through hole (87) at each rear end (85G) (85R) (85B) of the support pieces (20a) and (20b).

Then, as shown in FIG. 24, this conductive support piece (20a)
And (20b), the through hole (87) has a ceramic base (1
9) Ceramic base (1) to fit through hole (92)
9) After arranging it on the top, insert the tapered conductive pipe (93) from the through hole (87) side into the through hole (92) of the ceramic base (19).
Each conductive pipe (93) inserted in the through hole (92)
It is fixed to the ceramic base (19) by crushing the end (93a) of the. The support pieces (20a) and (2
The leads (89) extending to both sides of 0b) are left only on one side and the other side is cut off depending on how the cathode is connected. And, this support piece (20a) (2
In 0b), when the cathode connection method of FIG. 30 is used, the leads (89) of adjacent support pieces are directly connected in series by spot welding.

In the above example, the separator structure (40) on the anode side is held by sandwiching the supporting claw (43) between the front panel (11A) and the side plate (11C) of the glass casing (11). In this case, the claw (43) is about half the thickness of the side plate (11C), but when it is necessary to further increase the pressure resistance between the tip of the claw (43) and the outer surface of the glass enclosure. Is a side plate (11C) of the glass enclosure (11) as shown in FIG. 17, for example.
A glass plate (72) is further placed inside the separator, and a separator structure (40) is provided between the glass plate (72) and the front panel (11A).
Can be configured to hold the claw (43) of the.

Further, in order to hold the separator structure (40), the supporting claw (43) may be omitted and the separator structure (40) may be directly fixed to the front panel (11A) of the glass frame (11) with frit glass. . At this time, since the supporting claw (43) is omitted, the discharge with the outside of the glass casing and the discharge within the glass casing, that is, the so-called creeping discharge along the side plate (11C) is surely prevented. At this time, on the front panel (11A) side, the carbon layer (15) and the metal back layer (16) are not formed in the portion where the frit glass is bonded. In addition,
When the display device is constructed, the front surface of the glass housing (11) is covered with a unit panel which also functions as an outside light shield, which will be described later, except the fluorescent trio, so that the frit glass portion is hidden.

In the above example, the mesh section (29G) of the _2nd grid G ₂ (29G)
R) (29B) has a slit shape, but in this case, since the opening in the longitudinal direction of the slit is large, the electron lens is constructed by the entry of the high electric field (80) as shown in FIGS. 25 and 26. There is a weakness. On the other hand, if the mesh part (29G) (29R) (29B) is made into a fine tortoise shape as shown in FIG. 27, the high electric field does not enter (see FIG. 28) and the electron lens is not formed. .

Further, in the above example, the column is selected by switching the voltage of the second grid (G ₂ ), but it is also possible to select the column by switching the wire cathode (K), for example. In this case,
As shown in Fig. 29 (parallel connection) or Fig. 30 (series connection), the wire cathodes (K) of the electrode units (13a) to (13d)
Are commonly connected, and the wire cathodes (K) of the electrode units (13e) to (13h) are commonly connected. In operation,
Commonly connected wire cathodes (K) in the upper and lower rows
Are lit, and a drive voltage of, for example, 0 V to 5 V or less is applied with each wire cathode as a column selection voltage, a drive voltage of 0 V to 5 V or less is applied to the first grid (G ₁ ), and each electrode unit is further provided. A fixed voltage of 10 V or less is commonly applied to the second grids (G ₂ ) of (13a) to (13h). Therefore, for example, 0 V is applied to the wire cathodes (K) of the upper row electrode units (13a) to (13d), and the wire cathodes (K) of the lower row electrode units (13e) to (13h) are cut off, for example, 5V. read the (64G ₁₎ the first grid (G _1), for example, 5V via is applied first phosphor trio (12a) is a light-emitting display in a state where given. When 0V is applied to the first grid (G ₁ ), the electron beam is cut off and the corresponding phosphor layer does not emit light. Then, by applying a voltage to the first grid (G ₁ ) sequentially through the leads (64G ₁ ) (65G ₁ ) (66G ₁ ) and (67G ₁ ), the fluorescent trio (12a) to (12d) in the upper row emit light. The drive voltage of the wire cathode (K) is switched next, and 0 V is applied to the wire cathode (K) in the lower row, and leads (64G ₁ ) to (67
When the voltage 5V of the first grid (G ₁ ) is applied to G ₁ ) in order, the fluorescent trios (12e) to (12h) in the lower row emit light.
In this case, in each of the electrode units (13a) to (13h), the second grid (G ₂ ) is commonly connected to each other.

For example, as shown in FIGS. 31 to 33, a common plate-shaped conductive auxiliary member (68) is provided, and this auxiliary member (68) cuts out the notches (96) of the electrode unit casings (26). Bend the notch when it was formed, and insert the auxiliary member (6
8) is spot welded, and the second grids (G ₂ ) are commonly connected. At the same time, in this case, the conductive retainer structure also uses the integrated conductive retainer structure (98) common to the eight electrode units (13a) to (13h), and the common conductive retainer structure (98) is used. Also each second grid (G ₂ ) is commonly connected. The auxiliary member (68) is integrally provided with a shield tubular portion (121) through which the anode lead (46) is inserted, and the reinforcement is bulged linearly at the center of both sides of the tubular portion (121). A bead portion (122) is formed. A ring-shaped getter container (123) is integrally attached to the common conductive retainer structure (98). The getter container (123) is arranged such that the getter material faces the rear panel side of the glass casing (11).

Although not shown, the auxiliary member (68) is spot-welded to the retainer structure (34) of each electrode unit (13a) to (13d) and the retainer structure (34) of each electrode unit (13e) to (13h). , Or with the retainer structure (34), the auxiliary member (68) is spot-welded to the bent portion (97) of each electrode unit housing (26) to commonly connect the second grids (G ₂ ). You can also do it.

In the above example, eight sets of fluorescent trio are arranged, but the number of sets is not limited to this, and can be appropriately selected.

Figures 34 and 35 are examples of display cells comprising two sets of phosphor trios.

In this example, the front panel (11A) is 39 mm long and 86 mm wide.
2 sets of electrode units (90) [(90a), (90b)] are placed in the glass enclosure (11) of the size of, and the front panel (11A) is placed so as to face these electrode units (90). Two sets of fluorescent trio (12) [(12a), (12b)] are arranged on the inner surface. On the fluorescent surface side, each color fluorescent layer (14R) of each fluorescent trio (12), (14G), (14
A separator structure (4
0) is placed.

In this case, the electrode unit (90) is a unit case (26) in which the second grid (G ₂ ) having fine mesh-shaped mesh parts (29B), (29R), (29G) is spot-welded. When,
Three first grids (G _1B ), (G _1R ), (G _1G ),
3 suspended between a pair of conductive support pieces (20a) and (20b)
It consists of two wire cathodes (K _B ) (K _R ) (K _G ). The unit case (26) forming a part of the second grid (G ₂ ), each first grid (G ₁ ), and the pair of support pieces (20 a) and (20 b) are respectively made of a glass case ( It is spot-welded directly to the lead frame (60) arranged on the inner surface of the rear panel (11b) of 11) to be electrically and mechanically supported.

In the E-shaped conductive support piece (20) for supporting the wire cathode (K), one has a fixed support piece (20a) and the other has a spring portion (21 ') as shown in FIG. The support piece (20b) is made. End support piece (20a) each wire cathode _{(K B)} of (20b) (K R) ( K G) is stretched, the center out of the wire cathode (K) has a notch for perform It is made into a bent shape.

On the other hand, in this example, a conductive getter container (70) electrically and mechanically supported on a part of the separator structure (40) is arranged at a position near the front panel (11A).
The anode lead (46) is connected to 0).

Further, regarding the holding of the separator structure (40), the supporting claw (43) is omitted, and the separator structure (40) is directly fixed to the front panel (11A) of the glass casing (11) with the frit glass (81). It That is, an opening (80) is provided in the electrode plate of the separator assembly (40), and this opening (8
The extension (82) extending to 0) and the front panel (11A) are fixed by the frit glass (81). In this case, on the front panel (11A) side, the carbon layer (15) and the metal back layer are not formed in the portion where the frit glass (81) is bonded. Therefore, the pattern of the carbon layer (15) is formed as shown in FIG. In addition, the separator structure (4
A plurality of cut-out portions (83) are integrally provided from the side of the opening (80) of (0) and elastically folded back to contact the metal back layer (16) and the carbon layer (15) to form the cut-out portions. Origin (8
By 3), the fluorescent surface and the separator structure (40) are electrically connected. When a large number of display cells (71 ') are arranged to form a display device, the glass panel (11) is covered with a unit panel that also functions as an external light shield except for the fluorescent trio. The glass part is hidden. Thus, when the separator structure (40) is directly fixed to the front panel (11A) of the glass housing (11), the supporting claws (43) are omitted, so that the outside of the glass housing is secured as described above. Discharge and so-called creeping discharge along the inner surface of the side plate (11C) in the glass enclosure are prevented. The method of holding the separator structure (40) and the contact between the separator structure (40) and the fluorescent surface can be applied to the examples of FIGS. 1 and 2 described above. A large-screen display device can also be obtained by arranging a large number of display cells (71 ') shown in FIGS. 34 and 35. When the display cells (71 ') are arranged, the green, red, and blue phosphor layers (14G) (14R) (14B) can be arranged in the same manner in each column (horizontal line) as described above. It is also possible to arrange the green and blue phosphor layers (14G) and (14B) for each row (horizontal line) in the left-right direction, and at this time, the apparent resolution is increased.

A plurality of fluorescent display cells (71) and (71 ') as described above are assembled in a unit panel to form one unit,
Furthermore, a large-screen display device is constructed by arranging a large number of these units. In the case of a display cell (71) having eight sets of fluorescent trios, one unit is formed by combining, for example, vertical 8 × horizontal 4 = 32, and a large number of this unit X-
Arranged in a Y matrix to form a large display device.

When a large-sized display device is constructed by arranging a large number of the display cells (71) or (71 ') described above, reflection of external light on the display surface may cause deterioration of contrast and image quality.
For this reason, the surface of each display cell (71), (71 ') is subjected to anti-reflection matte treatment. For example, FIG. 38 and
In the example of FIG. 39, the surface of the display cell (71), that is, the glass casing (1
A matt-treated transparent resin film (115) having a light transmittance of 90% is attached to the surface of the front panel (11A) of 1). In this case, the resin film (115) is formed of a film capable of preventing reflection of external light and blocking ultraviolet rays.
The resin film (115) for blocking ultraviolet rays is, for example, as shown in FIG. 40, the red, green, and blue fluorescent layers (14R), (14G), (14B) of the fluorescent trio (12). Corresponding to red,
When a color filter (116) composed of green and blue filter components (116R), (116G) and (116B) is formed on the front panel (11A) of the display cell (71) to improve the contrast. It is valid. That is, although the organic dye of the filter (116) may fade due to ultraviolet rays, the resin film (115) prevents deterioration of the color filter.

As the matte treatment of the surface of the display cell, other than pasting the above resin film (115), the glass surface of the front panel (11A) is etched to make it uneven, or the glass surface of the front panel (11A) is For example, a method of spraying a clear lacquer or depositing SiO ₂ to form an uneven surface is possible.

By applying matte treatment to the surface of the display cell,
When a large display device (117) is configured as shown in Fig. 41, the external light (118) is diffusely reflected (118 ') on the display surface, and the effect of the external light is reduced on the side of the spectator (119). The deterioration of contrast and image quality is avoided. Adhering the matt-treated resin film (115) is advantageous in terms of cost and stability, and can also serve to protect the glass surface of the front panel (11A).

Next, assembly of the unit using the display cell (71) will be described.

First, as shown in FIGS. 42 and 43, two display cells (7
1) Pressure-sensitive adhesive on both sides on the rear panel (11B) so as to extend over both display cells (71) (71) in a state where the gaps (d) are juxtaposed such that the gap d is, for example, 2-3 mm. Both display cells (71) and (71) are integrated by adhering a cell fixing substrate (132) made of, for example, a synthetic resin, which also serves as a spacer, via a cushion (131) with an agent. Further, as shown in FIGS. 44 and 45, a common drive circuit board (133) having drive circuits for both display cells (71) and (71) is mounted on the fixed substrate (132) to display the display cell. A display tube block (134) is formed by combining two (71). Here, the cushion (131) is provided with a notch (135) for inserting the insulating cylindrical body (101) of the anode lead protruding from the rear panel (11B) of the two display cells, and at the same time, the central portion (ie, An engaging hole (136) for positioning with the cell fixing substrate (132) is provided at a position just corresponding to a gap between two display cells (71) (71) juxtaposed.

Further, the cushion (131) in the cell fixing substrate (132)
Has a notch (137) corresponding to the notch (135) and has the same shape as the cushion (131) in plan view, and has a predetermined height along the width direction of the display cell (71) at the center of one surface thereof. The spacer part (138) of t and the mother screw part (139) having the same height as the spacer part (138) are integrally provided, and the spacer parts (140) having the same height t are integrally provided at both ends. . The mother screw part (139) is provided on the lead (100) side of the display cell (71), and the spacer part (140) is provided on the opposite side of the lead (100). A protrusion (142) that engages with the positioning hole (141) of the drive circuit board (133) is provided on the upper end of the spacer portion (140). (143) is a cell fixed substrate (132)
It is a protrusion that engages with the engagement hole (136) of the cushion (131) protruding to the other surface. The drive circuit board (133) is provided with a through hole (144) through which the insulating cylindrical body (101) of the anode lead protruding from both display cells (71) (71) is inserted, and the display cell lead (100) side. A semicircular cutout (145) into which a boss (156) from a unit panel (151) described later can be inserted is provided at the center of one side edge of the. The drive circuit board (133) has a through-hole (144) in the insulating cylinder (10) of the display cell.
1) is inserted on the spacer parts (138) and (140) and the mother screw part (139) of the cell fixing substrate (132),
Screw the screw (150) from the drive circuit board (133) side to the mother screw (13
It is fixed to the cell fixing substrate (132) by screwing into 9). In this case, the cell fixing substrate (132) is placed on the cell fixing substrate (132) and the holes (14
It is positioned by engaging the protrusion (142) of the cell fixing substrate (132) with 1). After the drive circuit board (133) and the cell fixing board (132) are screwed together, both display cells (7
1) The leads (100) of (71) are soldered to the wiring pattern of the drive circuit board (133), so that both display cells (71) (71) are more firmly integrated.

On the other hand, as shown in FIGS. 46 to 48, the unit panel (15
1) is provided. This unit panel (151) has, for example, 8 display cells vertically by 4 = 32 display cells (71) arranged therein, and 256 display cells (12) of the 32 display cells (71) facing each trio (12). Matrix windows (152) are provided.

Eaves (153) are integrally formed on the surface of the unit panel (151) for each horizontal row of the windows (152). Further, a partition part (154) for positioning each display cell (71) is formed vertically and horizontally on the back surface of the unit panel (151), and the display cell (71) is formed at a predetermined intersection point of the partition part (154). ) Holding and guiding members (15)
5) is provided integrally.

The holding / guide member (155) has a boss portion (156) for holding the display cell (71) and a guide portion (overhanging vertically and horizontally from the base portion of the boss portion (155) and connected to the partition portion (154). 157), and particularly the guide portions (157) in the vertical direction orthogonal to the eaves portion (153) are formed so as to be continuous with each other. As shown in FIG. 49, the boss (156) is provided separately from the unit panel (151) and is firmly bonded to the base (155a) of the holding / guide member. in this case,
The cross-shaped groove (156a) of the boss portion (156) is fitted into the cross-shaped base portion (155a) and is integrated with an adhesive.

Then, as shown in FIGS. 50 to 51, a predetermined number of display tube blocks (134) in which the above-described two display cells (71) (71) are integrated are arranged on the back surface of the unit panel (151). . At this time, each display cell (71) is partitioned by the partition part (154) and the guide part (157). Next, in the boss portion (156) protruding from the center between the two display tube blocks (134) adjacent to each other, the boss insertion hole (1
A display tube block (134) having a bifurcated retainer (164) having a pair of legs (162) and (163) and a pair of legs (162) and (163) adjacent to each other. The drive circuit board (133) is inserted so as to abut. Next, the chassis (165) on which the high-voltage power supply, the power supply line, the signal line, etc. are arranged is placed in common on each retainer (164), and the chassis (165) and the boss (156) are screwed (200). Fixed. At this time, the two blocks (134) are held by the presser foot (164).
Are pressed and held, that is, four display cells (71) are held by a common holding tool (164) to form one unit (166) shown in FIG. 54.

When assembling this one unit (166), as shown in FIG. 51A, the phosphor trio (12) is replaced by the green phosphor layer (14G).
Display tube block (134A) having a display cell (71A) arranged in the order of a red phosphor layer (14R) and a blue phosphor layer (14B).
As shown in FIG. 55B, the fluorescent trio (12) is arranged in the reverse order of the blue fluorescent layer (14B), the red fluorescent layer (14R) and the green fluorescent layer (14G). A display tube block (134B) having arranged display cells (71B) is provided. Both display cells (71
Although the leads (100) are led out to the same side in both A) and (71B), the leads (10) of the display cells (71A) and (71B) are
0) is formed so as to be located between the leads (100) of each display cell. The display tube blocks (134A) and (134B) are arranged on the unit panel (151) so that the leads (100) face each other as shown in FIG. At this time, the leads (100) of both blocks (134A) and (134B) are arranged between the leads (100) of the other block so as to be staggered.

In this way, since the leads (100) of the display cells are arranged so as to face each other, the leads (100) are not arranged on the sides of the unit (166), so that the unit panel (15) is provided.
As 1), it is not necessary to consider the bending amount of the lead (100), and so-called dead space is not wasted.

In addition, since the two display cells (71) are configured as one block (134), the whole assembly of the unit (166) is simplified. Further, since each block can be inspected, work such as inspection and repair (so-called service system) becomes simple.

Also, since four display cells (71) are fixed at the same time by one boss portion (156), the number of fixing points can be reduced and the number of boss portions (156) can be reduced, and at the same time the display cell can be repaired or replaced. (71) Therefore, the block (134) can be easily replaced.

Further, in the unit panel (151), the eaves portion (153) extending in the lateral direction of the front surface reinforces the lateral direction, and the guide portion (157) extending in the longitudinal direction of the back surface reinforces the longitudinal direction. As a result, the mechanical strength of the unit panel (151) itself increases.

As shown in FIG. 54 and FIG. 56, display cells (71) are arranged vertically 8
× In the case of one unit (166) consisting of 4 = 32 horizontal units, one high voltage power supply (1
71) equipped with a high voltage lead (17)
2) is connected to each of the 32 display cells (71). In this case, the high-voltage power supply (171) and each display cell (71) should be 1
The protection resistors (173) are inserted in series. The protective resistor (173) is, for example, 100 KΩ. As the protection resistor (173), for example, a so-called fuse resistor as shown in FIG. 57A is used. This fuse resistor (173)
Is a 100KΩ resistor body (174) and a spring (176) arranged in an insulating cylinder (177). One end of the spring (176) is connected to one end of the resistor body (174) by a low melting point metal (that is, a fuse) ( 175) connected, and if an excessive current flows,
As shown in FIG. 7B, the low melting point metal (175) is melted by heat generation, and the spring (176) is separated from the resistor body (174) by the elastic biasing force and is disconnected. In the disconnected state, the distance l between the resistor body (174) and the spring (176) is a distance (for example, 8 mm or more) that can sufficiently withstand the voltage. The 32 protective resistors (173) are placed in the two cases (178) again as shown in Figs. 56 and 58.
6 pieces are stored together. And each resistor (1
One end of 73) is connected to a connecting means (107) via a lead (106), and the other end of each resistor (173) is commonly connected and connected to a high voltage power supply (171) through a lead (172). Then, as described above, the connecting means (107) is fitted to the insulating cylindrical body (101) of the anode lead (46) of the display cell (71), whereby the high voltage from the high voltage power source (171) is applied.
Supplied to 1).

In such a configuration, a large internal discharge in the display cell (71),
If an excessive current flows in the display cell (71) due to glow discharge or the like caused by poor vacuum due to slow leak,
If it is a 100KΩ protection resistor (173), the anode voltage HV is 8
When KV, the discharge current I is ^{I = 8 × 10 3/100} × 10 3 = 0.08A
Therefore, if the current capacity of the high-voltage power supply (171) is 13 mA, the electric power will also be 0.013 ² × 100K≈17 W, and the resistor (173) of only the display cell (71) in which the excessive current has flown will be disconnected. Therefore, only the defective display cell in one unit (166) does not emit light, and other display cells are not affected at all.

When one display cell causes internal discharge and this state continues, the high voltage power supply (171) fails or the high voltage becomes low (when the power supply capacity is small), but one display cell does not emit light. Since one protection resistor is inserted in one display cell, such a situation is avoided.

In the above example, anti-reflection matte treatment is applied to the surface of the display cells (71) (71 ') (that is, the resin film (115) shown in Figs. 38 to 41 is attached, the glass surface is etched, and the glass surface is applied. Clearing, matte treatment such as SiO ₂ deposition, etc. was performed.
It can also be applied to a display cell consisting of a set of fluorescent trio as shown in FIG.

Further, in FIG. 56 of the above example, in the display device using the display cell (71), one protection resistor is inserted between the high voltage power supply and each display cell. It can also be applied to a display device using the display cells shown in FIGS. 67 and 68.

The light emitting display cell (10) shown in FIGS. 67 and 68 has a carbon layer (1) on the inner surface of the front panel (11A) of the glass casing (11).
As shown in 5), a set of phosphor trio, that is, phosphor layers of three colors of red, green and blue (14) [(14R) (14G) (14
B)] is formed by adhesion, and each of these color phosphor layers (14R), (14R)
Three wire cathodes (K) facing G) and (14B)
_{[(K R), (K G} ), (K B) ] and a first grid (control electrode) (G _{1) [(G 1R), (G 1G} ), (G 1B) ]
And a common second grid (accelerating electrode) (G ₂ ) are arranged.

Each color phosphor layer (14R), (14G) and (14B) is surrounded by a separator (40), and an electron beam from each wire cathode (K) irradiates the corresponding phosphor layer (14). To be done. In this case, the anode terminal (5) for supplying the anode voltage to the phosphor layer (14) is connected to the front panel (11A) of the glass casing (11) and the side plate (1) via the separator (40).
1C), the other cathode (K), the first grid (G ₁ ) and the second grid (G ₂ ) terminals (6) are led out between the rear panel (11B) and the side plate (11C). It In this light emitting display cell, the anode voltage is supplied to the phosphor layer (14) through the anode terminal (5), and the voltage of the anode side and the second grid (G ₂ ) is fixed to the first grid (G ₁ ). It is selectively turned on or off depending on the applied voltage.

Next, the assembly of a large-sized display device in which a large number of the units (166) described above are arranged in a matrix will be described.

FIG. 59, FIG. 60, and FIG. 61 show the entire front view, enlarged cross-sectional view, and part of the back surface of the large-sized display device (181).

Each unit (166) is provided with one high-voltage power supply (171), and the drive circuit has a drive circuit configuration as described in, for example, Japanese Patent Application No. 60-17129, and has a metal cover as a whole. Be covered. In this case, the entire unit (166) is the front part (166a) on the display surface (166A) side as shown in FIG.
Is wide and the rear part (166b) is narrow.

This unit (166) is a pillar (18) of a structure (182) described later.
The display device (181) is configured by attaching to the 3) via a mounting portion in a matrix form, for example, 10 (vertical) × 13 (horizontal) = 130.
That is, the structure (182) is, for example, a plurality of columns (iron material) having a plate shape or a T-shaped cross section that extends vertically in a robust frame body (184) made of, for example, iron material at predetermined intervals and is a plate shape in this example.
(183) is fixed, and a decoration (185) made of stainless steel is attached around the unit (166). The framework (184) is composed of a pair of columns (1
94A) and (194B) between U-shaped upper horizontal frames (1
95) and the lower horizontal frame (196) are fixed by crossing over. The decorative plate (185) consists of two vertical plates (185A), (185
B) and two horizontal plates (185C), (185D), the horizontal plates (185C) (185D) are attached to the vertical plates (185A) (185B), and the vertical plates (185A) (185B) are on the upper side. And attached to the lower lateral frames (195) and (196). Adjacent columns (18
The center-to-center distance D ₁ of 3) is made substantially equal to the width D ₂ of the front part (166a) of the unit (166). In the mounted state, the units (166) are arranged with almost no gap, with a gap of 1 to 2 mm between them. Meanwhile, units (166)
At the rear part, mounting fittings (186) and (187) each having an L-shaped cross section are fixed to the upper surface and the lower surface by spot welding.
This mounting bracket (186) (187) has two adjacent pillars (18
3) The unit (166) is attached to the structure (182) by inserting it between the ends and fixing both ends of the mounting brackets (186) (187) with bolts (188) from the back of the pillar (183). (See Fig. 62). In addition, on the back side of the structure (182)
A scaffold (190) for the worker (189) is provided as shown in FIG. In this example, the effective screen of the display device is about 3.5 m in height x about horizontal.
Since it is 4.6m, the scaffolding (190) will be provided in two steps, up and down.

In this way, a display device (181) formed by fixing a large number of units (166) to a structure (187) has, for example, both columns (194A) and (194B) on a floor (197) as shown in FIG. Fixed,
Further, the fall prevention member (198) is attached to the columns (194A) and (194A).
It is fixedly installed between B) and the wall (198 '). Note that such a display device (181) can be installed outdoors or indoors.

FIGS. 65 and 66 show an example in which the display device (181) is installed in a showroom (201) whose front surface (202) is covered with glass. In this example, an auxiliary wall (203) for partitioning is provided in the showroom (201), and the display surface of the device (181), that is, the stainless decorative plate (185) only faces the opening of the auxiliary wall (203). A device (181) is installed.

The unit (166) is attached and detached from the back side of the structure (182). No. 6 if unit (166) is removed
After removing the bolt (188) as shown in Fig. 3, move the unit (166) to the rear and move it further rearward while moving it to one side as shown by the chain line (I), and then as shown by the chain line (II). Pillar (183) while rotating the unit (166)
Take out the unit (166) from the space. When mounting, it may be performed in the reverse order.

FIG. 64 shows an example of attaching and detaching the unit (166) from the front side of the structure (182). That is, unit (166)
The upper and lower mounting brackets (18
6), (187) are inserted between the both ends, and a substantially U-shaped auxiliary metal fitting (191) as shown in the figure is attached by a bolt (192). The unit (166) is attached to the structure (182) by fixing the auxiliary fitting (191) to the pillar (183) from the surface thereof with the bolt (193).

Thus, the unit (166) is configured to have a wide front portion (166a) and a narrow rear portion (166b), and the structure (182) via the pair of mounting brackets (186) (187). Pillar of (1
Since it is attached to the unit 83), the unit can be easily assembled into the structure (182), or can be easily removed and attached when the unit is repaired or replaced. Moreover, adjacent pillars (183)
The distance D ₁ between is the wide front (166a) of each unit (166)
Since the width D ₂ is substantially equal to the width D ₂ , a large number of units are arranged without any gap during assembly.

〔The invention's effect〕

According to the present invention, in a large-sized display device in which a plurality of display cells are combined to form one unit, and a large number of the units are arranged in an XY matrix, one protection resistor is provided between each display cell and the power supply. The display cell can be protected by inserting the device, and even if the protective resistor is disconnected due to excessive current, only the display cell corresponding to the disconnected protective resistor will stop emitting light and the The other display cells are not affected, and the power supply breakdown can be prevented. Therefore, it is easy to handle in a large display device.

[Brief description of drawings]

1 and 2 are a front view and a side view with a part broken showing an embodiment of a fluorescent display tube according to the present invention, and FIG.
FIG. 4 is an exploded perspective view of the electrode unit, FIG. 5 is a plan view of the electrode unit, FIG. 6 is a sectional view taken along the line AA of FIG. 5, and FIG. 8 is a sectional view taken along the line BB in FIG. 8, FIG. 8 is an enlarged sectional view of an essential part of FIG. 2, FIG. 9 is a perspective view of a lead-out portion of the anode lead, and FIGS. Sectional views of main parts showing other examples of lead connecting portions, FIG. 12 is a perspective view of a separator structure on the anode side, FIG. 13 is a plan view showing an arrangement state of fluorescent trio, and FIG. FIG. 15 is a plan view showing another arrangement state of the fluorescent trio, FIG. 15 is a perspective view showing another embodiment of a plurality of electrode unit portions connected to each other, and FIG. 16 is a sectional view showing the arrangement portion of the getter container, FIG. 17 is a sectional view showing another embodiment of the fluorescent display tube, and FIG. 18 is a diagram showing another example of the method of connecting the cathodes.
19 and 20 are an exploded view and a cross-sectional view showing another example of the support structure of the wire cathode of the electrode unit, FIG. 21 and FIG.
FIG. 22 is an exploded view and a sectional view showing another example of the support structure of the wire cathode of the electrode unit, and FIGS. 23 and 24 are exploded views and a sectional view showing another example of the support structure of the wire cathode of the electrode unit. 25 and 26 are a plan view of the second grid G ₂ and a cross-sectional view of the second grid G _{2 taken along} the line CC, and FIGS. 27 and 28 are plan views of essential parts showing another example of the second grid G ₂ . Figure and its D
Fig. 29 is a cross-sectional view taken along the line -D, and Figs. 29 and 30 are diagrams showing another example of the method of connecting the cathodes, respectively, Figs. 31, 31, 32 and 33.
The figure is a plan view showing another example of the connecting structure of the electrode units, its sectional view on the line EE and sectional view on the line FF, and FIGS. 34 and 35 are other embodiments of the fluorescent display tube. FIG. 36 is a plan view showing the pattern of the carbon layer, FIG. 37 is a perspective view showing an example of a supporting piece of the wire cathode, and FIGS. 38 and 39 are FIG. 40 is a front view showing another embodiment of the fluorescent display tube and a side view showing a cross section of a part thereof. FIG. 40 is a sectional view of a main part showing still another embodiment of the fluorescent display tube.
41 is a side view of the display device used to explain the prevention of external light reflection,
42 and 43 are an exploded view and a perspective view showing an example of an assembled state of a fluorescent display tube block having two display tubes as a set, and FIG.
Fig. 45 and Fig. 45 are perspective view and GG of the fluorescent display tube block.
Cross-sectional views on the line, FIGS. 46 and 47 are front views and cross-sectional views of the unit panel, FIGS. 48 and 49 are perspective views and exploded views of the main part of the back surface of the unit panel, FIG. 50, and FIG. 51 and 52 are a rear view of the main part of the unit, a middle view and a side view thereof, FIG. 53 is a perspective view of the presser foot, and FIG. 54 is a front view showing an example of one unit, and FIG. 55A. And B are plan views showing examples of fluorescent display tubes each having one block, FIG. 56 is a configuration diagram of a display device in which a protective resistor is connected to each display tube, and FIGS. 57A and 57B are examples of protective resistors. FIG. 58 is a perspective view in which a protective resistor is housed in a case, FIG. 59 is a front view showing an example of a display device according to the present invention, and FIGS. 60 and 61 are enlarged cross-sectional views thereof. The rear view, FIG. 62 is a perspective view of the unit attached to the structure, FIG. 63 is an explanatory view of the unit taken out of the structure, and FIG. FIG. 65 and FIG. 66 show a front view and a top view of a display device installed in a showroom, and FIGS. 67 and 68 show a fluorescent display tube. It is the front view and the sectional view showing other examples. (11) glass enclosure is (12) [(12a) ~ (12h)] is fluorescers trio, (13) [(13a) ~ (13h)] is the electrode _unit, (K G) _(K R) (KB) is the wire cathode, (G _B
1G ) (G _1R ) (G _1B ) is the first grid, (G ₂ ) is the second grid, (46) is the anode lead, (10), (71),
(71 ') is a display cell, (171) is a high voltage power supply, and (173) is a protective resistor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Nakagawa Inventor Hideaki Nakagawa 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (56) Reference JP-A-53-108300 (JP, A)

Claims (1)

[Claims] 1. A plurality of display cells each having a cathode, a grid, and a fluorescent display segment are arranged in a matrix form.
What is claimed is: 1. A fluorescent display device comprising a unit and a plurality of the units arranged in a matrix, wherein one power source is connected to each unit or each unit, and each display cell in the unit is connected to the power source. A fluorescent display device in which one protective resistor having a structure that breaks when an excessive current flows through the display cells is inserted between the power sources.