JPH0719552B2 - Flat panel display - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device that displays an image using an electron beam.

2. Description of the Related Art As a conventional flat panel display device, for example, there are JP-A-56-106353 and JP-A-60-180053.

FIG. 6 is an overall perspective view of JP-A-56-106353.
FIG. 7 is a partial perspective view thereof. In the figure, 50 is a face plate, 51 is a supporting means, 52 is a shadow mask, 53 is a position regulating member, 54 is a deflection electrode, 55 is an electrode plate, and 56 is an envelope.

FIG. 8 is a cross-sectional view of the essential parts of JP-A-60-180053, where 60 is an electrode assembly, 61a is an electrode block, 62 is a signal electrode plate,
63 is a high voltage electrode plate, 64 is an electrode holding plate, 65 is a connecting plate, 66 is a screw,
67 indicates a floor plate.

Japanese Unexamined Patent Publication No. 56-106353 discloses a structure in which support means 51 is arranged on a face plate 50, a shadow mask 52 is placed between the support means 51, and an electrode unit group is placed on the support means 51. is there. The atmospheric pressure applied to the container is the support means 51 inside.
And is supported by the deflection electrode 54.

JP-A-60-180053 discloses that an electrode assembly 60 is constructed by sandwiching a signal electrode plate 62 and a high voltage electrode plate 63 between electrode holding plates 64.
And the connecting plates 65 are arranged at two positions above and below to connect the electrode assemblies. 67 is a floor plate and only one of the electrode assemblies is placed. 66 is a screw fixing one electrode assembly. The atmospheric pressure is a structure that does not act on the electrode assembly.

Problems to be Solved by the Invention In the conventional example shown in FIG.
However, the deflection electrode 54 and the electrode plate 55 are integrated in the deflection electrode 54.
As a result, the fitting work to the position regulating member 53 becomes very difficult. Further, when the deflecting electrode 54 is engaged with the supporting means 51, the supporting means may move to damage the fluorescent body, which is a great defect in image quality. Further, the configuration in which the individual deflecting electrodes 54 are engaged with each other only increases the defects of the fluorescent body.

On the other hand, in the conventional example shown in FIG. 8, the electrode plate electrode assembly 60 is used, the electrode assembly 60 is placed on the floor plate 67, and the connecting plate 65 is fixed from two positions on the upper and lower surfaces.
The distance from 61a is kept constant. In this configuration, the positioning structure of the individual electrode assembly 60 with respect to the phosphor is not disclosed. Further, when the electrode assemblies 60 are connected to each other on the upper and lower surfaces, there is a problem that a relative displacement with the floor plate 67 occurs.

Means for Solving the Problems The present invention relates to an electron beam source, a front plate having an inner surface coated with a fluorescent substance that emits light by its shooting, an envelope including a side wall and a rear plate, and a substantially plate-like shape. A plurality of pillar-shaped electrodes that are perpendicular to the front plate and are arranged at equal intervals, holding means arranged at both ends of the pillar-shaped electrodes to hold a plurality of pillar-shaped electrodes as a unit, The flat panel display device includes a positioning means provided on a plate for positioning unitary electrodes, and a coupling means for coupling adjacent holding means on the electron beam source side.

Action Assembling the supporting means abutting against the fluorescent body fixed to the deflection electrode plate into a unit and assembling it, and mounting the unit-shaped deflection electrode on the fluorescent body through the positioning means, There is no problem of misalignment or damage to the fluorescent body when assembled. Furthermore, for the holding means provided on the electron beam source side,
Due to the structure in which adjacent members are joined together, the distance between the deflection electrodes at the boundary of the unit is kept constant, and even if atmospheric pressure acts on the electrode members, the distance does not fluctuate, while it contacts the fluorescent surface. When the atmospheric pressure acts, the supporting means receives a large pressure and strongly adheres thereto. Therefore, there is no risk of relative displacement due to thermal expansion of the front plate, and there is no damage to the fluorescent body due to relative displacement.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is an assembly perspective view of a display device of the present invention, and FIG. 2 is an overall schematic view. Reference numeral 1 is a front plate made of a glass material, and a fluorescent body 2 is applied to the inner surface thereof. A reference pin 3 as a positioning means is provided on the inner surface of the front plate outside the fluorescent body region.
A plurality of reference pins 3 are arranged at predetermined positions in the pattern of the fluorescent body 2 and on both sides of the fluorescent body 2 at a predetermined pitch. Reference numeral 4 is a side wall, and 5 is a back plate, which constitutes an envelope. 6 is a deflection electrode unit. Plural plate-shaped deflection electrodes 7 are arranged perpendicularly to the front plate 1 at equal intervals. Reference numeral 8 is a reference block as a holding means, which is provided at both ends of the deflection electrode 7. Reference numeral 9 is a holding block as holding means, and 10 is a side plate that connects the reference block 8 and the holding block 9. Reference numeral 11 denotes a positioning plate, which is provided on both sides of the deflection electrode unit 6 on the front plate 1 side, and the projection 11a is fitted to the reference pin 3. The reference block 8 holds a predetermined number of deflection electrodes 7 and constitutes a unit. As shown in FIG. 2, a plurality of electrode units 6 are arranged side by side to cover the entire image area. 12 is a block connecting plate,
As shown in FIG. 3, the reference blocks 8 on the electron beam source side are fixed by spot welding so as to be coupled to each other. The joint plate is made of a material having a thermal expansion coefficient similar to that of the reference block. The connecting plate has a side end portion of the reference block 8,
Alternatively, it may be provided in the upper part. Further, the connecting plate may have another shape. Reference numerals 13, 14 and 15 are thin plate-like electrode plates having a large number of small holes for passing electron beams. The electrode plates 13, 14, 15 are also formed in a unit shape. FIG. 3 is a side view of an essential part of the electrode unit, and FIG. 4 is a sectional view of the electrode unit. FIG. 5 is another side view of the electrode unit. 17 is an insulating spacer, 18 is a back electrode, and 9 is a cathode. Reference numeral 21 is a spring which is fixed to the reference block and biases the deflection electrode 7 to one side. Reference numeral 22 is a needle-shaped screen as a supporting means, and is fixed to the front plate side surface of the deflection electrode 7 together with the supporting plate 23. One of the partitions 22 is in contact with the fluorescent body 2. The partitions 22 at both ends in the arrow A direction are slightly longer than the other partitions. Reference numeral 24 is a holding plate that supports the deflection electrode 7 at its end. Reference numeral 11b denotes a bent portion of the positioning plate, which holds the deflection electrodes 7 on the front plate side at equal intervals. In FIG. 1, the cathode 19, the back electrode 18, the back plate 5 and the like are not shown. The inside is evacuated, and the atmospheric pressure acting on the container is supported by the internal electrode group. Time, previously outside leave assembled electrode unit 6, the hole portion 11a of the positioning plate 11 to the reference pin 3 units in the container incorporating the electrode unit 6 in a container coated with fluorescent body in the above-described configuration
Insert while mating. When the inserting operation is completed, only the end portion of the partition 22 of the electrode unit 6 abuts on the fluorescent body 2. In this state, the electrode plates 13, 14, 15 and the insulating spacer 7 are sequentially placed. Further, the connecting plate 12 and the adjacent reference block 8
Weld to join. Further, the cathode 19, the back electrode 18, and the back plate 5 are set and sealed. When the inside is evacuated after sealing and the atmospheric pressure is applied to the internal electrode group, the partitions 22 all come into contact with the fluorescent body 2 and act to support the atmospheric pressure.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) Since the support member is in contact with the fluorescent body for the first time when atmospheric pressure acts, the fluorescent body is not damaged during assembly.

(2) When the atmospheric pressure is applied, since the fluorescent body side of the electrode unit is positioned by the reference pin, there is no deviation between the fluorescent body and the screen. On the other hand, since the reference block on the electron beam source side is joined by the joining member, the gap between the deflection electrode plates at the joint portion of the electrode unit does not change, and the flat display device with stable manufacturing quality is obtained.

[Brief description of drawings]

FIG. 1 is an assembled perspective view of a flat panel display device according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of the same, FIG. 3 is a side view of a main part of an electrode unit of the device, and FIG. 5 is a cross-sectional view of the electrode unit of FIG. 5, FIG. 5 is another side view of the electrode unit of the same device, FIG. 6 is an overall perspective view of a conventional flat panel display device, and FIG.
FIG. 8 is a perspective view of the main part, and FIG. 8 is a sectional view of the main part. 1 ... Front plate, 3 ... Positioning means, 4 ... Side wall, 5 ...
Back plate, 6 ... Deflection electrode unit, 7 ... Deflection electrode, 8
...... Holding means, 13,14,15 ...... Electrodes.

Front page continuation (72) Inventor Kiyoshi Saeki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-61-230250 (JP, A)

Claims (1)

[Claims] 1. An electron beam source, a front plate having an inner surface coated with a fluorescent material that emits light when the electron beam source strikes, an envelope including a side wall and a rear plate, and a front plate substantially perpendicular to the front plate. A plurality of pillar-shaped electrodes arranged at equal intervals, holding means arranged at both end portions of the pillar-shaped electrode for holding a plurality of pillar-shaped electrodes as a unit, and a unit shape provided on the front plate. 2. A flat panel display device comprising: positioning means for positioning the pillar-shaped electrodes of 1. and coupling means for coupling adjacent holding means on the electron beam source side.