JPH0426042A - Flat plate type cathode-ray display device - Google Patents

Abstract

PURPOSE:To lessen man-hours for assembly and enlarge the effective range of screen by furnishing a recess in the back plate, and installing there a cathode supporting means. CONSTITUTION:A cathode-ray display device concerned comprises a plurality of wire cathodes 12 set being stretched in parallel with one another, a back face electrode 16 installed on a back plate 14, a deflecting electrode 20 which deflects electron beam in the direction perpendicular to the wire cathodes 12, and a fluorescent substance layer 24 furnished on a facade plate 26 with which an anode 22 is installed consolidatedly, wherein the back plate 14 is provided with a recess 44 between a frame 42 and a base 40 on which the back face electrode 16 is to be mounted. The wire cathodes 12 are set being stretched over cathode supporting means 28, 30 installed in this recess 44 and located by a locational member 35 installed on the base 40. That is, cathode height and variation in the vertical direction can be lessened, and the spacing between the base 40 and cathode supporting means 28, 30 be lessened. This eliminates increase in the man-hours for assembly and allows increase in the effective range of screen.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a flat cathode ray tube display device for displaying large and small graphics. This invention relates to an improvement in a cathode ray tube display device in which both images are scaled up and down on a raster stitching "C" screen.

(Prior Art) The present applicant has previously proposed a flat panel image display device using 16-pole lines (Japanese Patent Application No. 1997-297664).

To explain the structure and operating principle of this display device, as shown in FIGS. a cathode 12, and a linear cathode 12 disposed on the back plate 14 side.
Horizontal control electrode (back electrode) installed perpendicular to
16, an electron extraction electrode 18 which is provided immediately before the cathode 12 and is divided horizontally in substantially the same manner as the cathode 12;
A pair of vertical deflection electrodes 2 provided to sandwich the cathode 12
In the drawing, 1 is provided with a front plate 26 having a phosphor film 24 on which an anode 22 is metal-backed on an insulating substrate such as glass, which is disposed opposite to a surface constituted by a plurality of cathodes 12. Adjacent deflection electrodes of the pair of vertical deflection electrodes 20 are fused together. In addition, in FIG. 1, for clarity of explanation, only the electrodes of each part are shown.
Front plate 26. Parts such as an envelope and a getter are omitted except for the back plate 14. Furthermore, in this specification, the term ``horizontal direction'' refers to the data input direction, and the term ``vertical direction'' refers to a direction perpendicular to this direction, but these are for convenience and may be reversed.

Next, the above constituent members and their functions will be explained.
The cathode 2 is, for example, a direct heating type in which a thin tungsten wire with a diameter of several tens of micrometers is directly coated with an electron radioactive substance such as (Ba, Sr, Ca)0, or a thin tungsten wire coated with a heat-resistant insulating material such as alumina. It is either an indirectly heated type in which the heater wire is made up of a heater wire and a nickel sleeve, etc. that covers the heater wire is coated with an electron radioactive material. By energizing the heated heater wire, the electron radiation temperature is 600~8.
It is heated to 00℃. In the case of an indirectly heated cathode, the cathode is constantly energized, but in the case of a directly heated cathode, the cathode is selected and the potential is made equal across its length. It will be done. In FIG. 1, an indirectly heated cathode 12 is shown, and the reference numeral 12a is a heater wire, and the reference numeral 12b is a heater wire.
is the sleeve.

The electron extraction electrode 18 is a metal plate-like electrode or cathode 12 having a plurality of through holes 18a for passing electrons.
It consists of a plurality of strip-shaped electrodes divided horizontally in correspondence with each other, and is used to focus and extract electrons from the cathode 12 by applying a positive potential to the cathode 12 during electron emission. . In addition, in Fig. 2, the reference numeral 19
is an insulating spacer that supports the electron extraction electrode 18 on the back plate 14.

The vertical deflection electrodes 20 are arranged to sandwich the cathode 12,
A pair of square-shaped electrodes, or a pair of square-shaped electrodes having a concave portion 20a that is approximately parallel to the screen surface of the front plate 24 and a deflection portion 20b that is inclined toward the cathode 12 or is approximately perpendicular to the screen surface; It consists of a pair of electrodes formed by forming a metal plate or metal film on an insulating substrate provided vertically, and focuses the electrons extracted through the electron extraction electrode 18 and deflects them in the vertical direction. 2
It is used to deflect and scan a predetermined rask area of the phosphor screen provided on the phosphor screen 4.

The horizontal control electrode 16 is located closer to the back plate 14 than the cathode 12,
Consisting of a plurality of electrodes arranged perpendicular to the stretching direction of the cathode 12, this horizontal control electrode 16 is vertically divided into approximately the same number as the horizontal resolution of this device, and
It is used to horizontally direct a sheet-like beam taken out from the electron extraction electrode 18 or a plurality of divided beams divided by the plurality of through holes 18a of the electron extraction electrode 18 and deflected in the same direction. The horizontal control electrode 16 basically consists of an electrode piece formed on the back plate 14 by depositing or etching a metal or conductive material.

The front plate 24 is made of a transparent insulating material such as glass and is disposed substantially parallel to the plane formed by the plurality of cathodes 12, and the phosphor surface 22 is integrated with an anode such as aluminum. , are provided on one side of the front plate 24.Next, to explain the operation of the above device, in this device, the cathode 12. The set of vertical deflection electrodes 2o is used as a scanning electrode, and the horizontal control electrode 16 is used as a data electrode, and by performing line sequential scanning using these scanning electrodes and data electrodes, any image can be displayed. Ru. for example,! (St ), (S
, ), (S3), and (S4) are connected together to display an image on the screen surface.The electron beam scanning first reduces the potential of the cathode 12 corresponding to the area (S,) almost only. On the other hand, the potential of the remaining cathode 2 in the region from (S, ) to (Sl) is set to be a potential L' with respect to the potential of the electron-extracting electrode 16. Now, electrons are extracted only from the cathode 12 of (s+), and immediately after that, a pair of vertically deflected growths arranged in such a way that the cathode 12 is sandwiched between them: By applying a stepwise or -77 angle waveform voltage, and by applying a gradually decreasing deflection electrode on the opposite side across the cathode 12, the deflection is scanned in the area (Sl) on the screen. . Next, the cathode 12 corresponding to the area (sj) is selected, and the following areas (S, ) and (Sl) are sequentially scanned using the same deflection scanning pulse 1, and one frame is formed by t;l. Also, in synchronization with the scanning timing of each area, a video signal is sent to the pole 16 of the Kihira control electrode. When performing 6-step deep deflection scanning, the electron i
The beam is deflected and the timing of scanning each predetermined pixel row with the electron beam is controlled.
t-pole 1 [;, cathode 12 and γ current extraction voltage 111.18
At least one or two or more of 1. ．． The potentials of the two are modulated at the same time.

Next L", this W plan Table - Equipment Cathode length 1 stage 3
As can be seen from the figure and No. 4, the horizontal control electrode 16 is removed from the rear plate 14-L, and the electrode 18 and Deflection # and pole 20 are attached to this back plate 14Lζ spacer 19 and the like.

The 12 cathodes (FIGS. 3 and 4), which serve as electric f-sources, are shown to be of the directly heated type, consisting of a tungsten wire coated with an electron emitting material and having a diameter of several micrometers. Both ends of the cathode 12 are connected to a cathode support stage 3 including a retaining member 28 made of a thin stainless metal plate and an extension member 30 which are attached to the back plate 14 by frit glass or the like.
2. It is expanded at °C by one stage of fixing such as welding. That is, the end of the cathode 12 is fixed to the pull member 28,
The other end is applied with a predetermined tension by the extension member 30 VA:i? It is °C.

The periphery of the back plate 14 becomes a sealing surface 14a for forming a 1i empty envelope each time it is integrated with the front plate having the phosphor layer 24.

In order to position the linear cathode 12 with respect to the other electrodes V in the vertical, horizontal and height directions, it is opened in a V-shape or a U-shape toward the back plate 14, as shown in FIG. A positioning member 34 having a shaped positioning hole 34a is used, and this positioning member 34 is fixed to the back plate 14. Align the plane with the positioning mark points (not shown) provided in the plane of the back plate 14 to align the horizontal and vertical force directions 11! Do this.

In order to drive the electron beam at a low voltage, the beam control electrodes such as the wooden control electrode 16 and the electron extraction electrode 18 are usually placed close to the cathode 12 by about 0.2 to 10.5 yr. Electrode 18 or horizontal control voltage @1
In order to set the cathode 12 at a predetermined distance from the cathode 6, it is necessary to control the cathode 12 in the height direction.For this control in the height direction, a positioning member 34 is fixed to the back plate 14 with frit glass. While pulling the linear cathode 12 through the positioning hole 34a of the positioning member 34, the distance from the back plate 14 to the fixing points 30a and 2Ba provided at 1. of the pulling IL member 30 or the extension member 2 is measured. The linear cathode 12 was drawn on the anode 22 side by taking a height larger than the height h of the opening provided on the positioning part side 34L' (see Figure 5), and by pressing the linear cathode 12 from the anode 22 side. .

[Invent or solve -4rua! [Problem] However, this conventional cathode structure 'τ has the following problems.

(1) Assembling 2■It must be a large number.

As shown in L, the height of the linear cathode 12 in the J direction is determined by the positioning hole provided in the positioning member 34. J34
Connect the linear cathode 12 to the highest point S on the side V of a! The conventional method was to hold the cathode 12 at I*22m and suppress it, but this method causes friction between the side wall of the positioning member 34 and the side wall of the positioning member 34. , depending on how it is held, the cathode 12 is not fixed at the highest point S of the wall, but in the middle of D due to frictional force, and as a result of 1-, the dimensions of the opening 34a are formed with poor precision. ζ, regardless
The intermediate height V of the cathode 12 and the positioning aperture 34a may be determined. Therefore, when assembling, hold the Ml pole 12 so that it does not touch the middle area of the positioning hole 34a.
．． (7)
There was a sweet spot.

(2) The effective screen area must be small.

Retaining member 30, extension t7! ! Since the drive 28, the positioning member 34, etc. are installed outside the effective area, it is desirable to make them as small as possible. For this reason, 1. Considering the above device, it may be considered to reduce the distance between the horizontal control electrode 16 and the positioning aperture 34a, the positioning aperture 34a and the retaining member 30, or the extension member 2B.
Regarding the latter, if the spacing is made small, the bending angle of the cathode 12 increases due to the positioning of the aperture 34a. 1' Due to the expansion of the cathode 12 in the length-f direction, the outer surface ζ' of the cathode 12, #! Cloth 1.・"[Due to problems such as peeling off of certain electron radioactive materials, it was difficult to reduce this distance to a value below 1115 nm in practical use4. The purpose of the present invention is to avoid the above-mentioned drawbacks. However, the number of assembled units does not decrease, and the effective screen fn is increased.
Polar table - Sometimes equipment is provided.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides at least q
- A plurality of linear v1 poles stretched almost parallel to each other, and a back plate 1. A deflection electrode for deflecting the electron beam in a direction perpendicular to the linear cathode, and a phosphor X1 layer provided on the stop plate and with an integrated anode, The same number of linear cathodes are used to scan a small image area and connect them to obtain one image. 2. The plurality of linear cathodes are suspended from the cathode support means attached to the recesses of the back plate, and one of the linear cathodes is mounted on the base part. A flat panel cathode ray display device is provided, which is characterized in that the display device is positioned by a positioning member.

(Function) In this way, the back plate is formed between the frame and the base on which the back electrode is attached. When the first stage of cathode support is installed in the recess of the back plate 2' and the positioning member is installed on the stand, the fluctuations in the height of the cathode and the direction of vertical force are small, and the assembly is easy. In addition, since the height of the cathode r of one stage of cathode support, the height of the fixed point and the positioning member can be made the same, the distance between the base of the 1v area and the first stage of cathode support can be made small. You can also increase the effective screen area with step 2.

(Example) To explain the present invention in detail based on an example, FIG. 6 and FIG. The target L'' is exactly the same as that shown in FIGS. 1 and 2, and includes a plurality of linear cathodes 12 stretched almost parallel to each other, and a stretched structure of these plurality of linear cathodes ai12. A plurality of horizontal control electrodes (back electrodes) 16 are provided on the back plate 14 in a direction perpendicular to the force direction, and an electric current f- is provided in a direction perpendicular to the linear cathode 12.
It is equipped with at least a vertical deflection type (@2f) that deflects both beams and a phosphor layer (not shown in Figs. 6 and 7) integrated with the anode 30i'1 installed on the stop plate, and the like. The beam is directed to the linear cathode 12, which has approximately the same number of small image areas (゛-
I am trying to get an image quality of 1. It should be noted that FIG.

In the display device of the present invention, the back plate I4 has a back electrode 1, and the illustrated embodiment τ has a base portion 40 on which a horizontal control electrode 16 is mounted.
A plurality of linear cathodes 12 are stretched over cathode support means 32 attached to the recesses 44 of the back plate 14.

The back plate 14 is made of an insulating substrate such as a guff or a material such as an insulating coated metal, as in the conventional case. As shown in FIG. 8(A), the back plate 14 includes a horizontal control electrode 16 as a back electrode made of a conductive film such as vapor-deposited metal or a notched thin sheet metal, or a pedestal 40 to which it is attached. As shown in No. 8156(B), it is possible to make the substrate part 14A and the frame part from a glass structure that is integrally press-molded so as to be approximately at the same height as the frame part 42 which is the sealing surface. 42 and the base part 40,
These are assembled by glass sealing, heat welding, etc.
It may also be formed by integrating the 'C' with steps. In addition, the base part 4
0 is not necessarily the C plane in the vertical force direction of the back electrode, but is the H plane corresponding to the part that controls the electron beam from the linear cathode 12: the pole part, for example, exposed to the cathode 12 in this embodiment. It is sufficient that only the water + control electrode portion, which corresponds approximately between the vertical deflection 111 poles, is at a constant height, and since it is not exposed to the cathode 12, the potential around the cathode 12 can be controlled. The remaining portions of the horizontal control electrode, such as the portion 7 of the non-biased end, may be provided with irregularities.

The water control electrode 16, which is an h-plane electrode with a water control resolution of approximately 41, is arranged vertically on the base 40 of the back plate 14 in parallel to seven planes. The horizontal control electrode 16 is made of Il such as low melting point frit glass (not shown).
! The electrode 18 and the vertical deflection electrode 20 are fixed to the surface of the base part 40 of the back plate 14 by a 1-stage stage, and the electric current extraction electrode 18 and the vertical deflection electrode 20 are connected horizontally by a smooth surface stage (not shown). It is laminated on the control electrode 16.

The cathode 12, which is an electric current f@, has the same structure as the conventional one, and this cathode support means 32 also has the same structure as the conventional one.
It consists of a retaining member 28 and an extension member 30, which are fixed at both ends of the extension member 2.

These pull members 28 and extension members 30 are formed by pressing etched thin metal plates, and are fixed onto the recesses 40 of the back plate 14 by fixing means such as low-melting frit glass. is positioned and fixed.

At this time, the depth t of the recessed part 40 from the first part 40, as shown in FIG. 16J-, the L-circle is extended toward the back plate 14 from the height of the suspension.

The height of the cathode 12 stretched over the back plate 14 and the vertical positioning of the cathode 12 are determined by fixing the cathode 12 to the edge 1 of the base 40 of the back plate 14 and making a U-shaped cut 35a. Either the positioning member 35 is made of a small metal piece, or the positioning member 35 is made of metal. This is done through a spacer such as a quartz fiber, glass plate, ceramic grinding plate, etc. whose outer diameter or wall thickness is controlled.

The notch 35a of the positioning member 35 is for precisely positioning the cathode 12 in the direction perpendicular to the screen, while the wall thickness or outer diameter of the groove is used to control the height of the cathode 12. It is something that can be done.

(Effects of the Invention) According to the present invention, as described above, a recess is provided in the back plate,
Since a retaining member and an extension member, which are one stage of cathode support, are installed in this recess, the following effects are produced.

(1) Assembling ■, reduce the number or reduce the number.

Is the cathode positioned? 8 There is almost no friction because the eaves are in contact with the shrine, and the height of the cathode is regulated by the thickness of the positioning member, and the position of the cathode in the direction of the center is regulated by the notch in the positioning member. Fluctuations in the cathode tension height and vertical direction are extremely small, thus shortening the assembly process and significantly reducing the rejection rate.

(2) The effective screen area can be increased.

The positioning member can be placed very close to the back electrode, and the height of the cathode fixing point on the retaining member and the extension member can be easily made to be approximately the same as the height of the positioning member, so that the pedestal part of the back plate The distance between the end of the holder and the retaining member and the extension member can be set to an extremely small value of 5 mm or less in practice, and therefore the effective screen area of the display device can be increased.

[Brief explanation of drawings]

1 and 2 are exploded perspective views and sectional views of a cathode ray display device previously proposed by the applicant, and FIGS. 3 and 4 are
5 is an enlarged perspective view and a sectional view of the cathode support means of the display device shown in FIGS. 3 and 4, FIG. 5 is an enlarged perspective view of the positioning member of the cathode support means of FIGS. 8(A) and 8(B) are perspective views of different examples of the back plate used in the present invention, respectively. FIGS. 10-----one cathode ray display device, 12-----cathode;
14----m-Back plate, l 6----Horizontal control electrode (back electrode), 18----Electron extraction electrode, 20-
---One vertical deflection electrode, 22--One anode, 24--
--One phosphor layer, 26------Front plate, 28------
one retaining member, 30 - one extension member, 32-111 cathode support means, 35 - one positioning member, 40
---m-base part, 42----frame part, 44-1---
recess.

Claims (1)

[Claims] A plurality of linear cathodes stretched substantially parallel to each other, a back electrode provided on the back plate, a deflection electrode for deflecting the electron beam in a direction perpendicular to the linear cathodes, and a deflection electrode provided on the front plate. A flat cathode ray display device comprising at least a phosphor layer with an integrated anode, the electron beam scans approximately the same number of small image areas as the linear cathode, and these areas are connected to obtain one image. In this, the back plate has a recess formed between a frame and a pedestal to which the back electrode is attached, and the plurality of linear cathodes are attached to cathode support means attached to the recess of the back plate. 1. A flat panel cathode ray display device, characterized in that it is stretched and positioned by a positioning member attached to the stand.