JPH04160741A - Image display unit - Google Patents

Abstract

PURPOSE:To realize an image at a low cost and of a high quality by surely increasing the voltage of metal-backed layer with the use of an anode terminal having an anchor hole made in the adhesive portion of the metal-backed layer. CONSTITUTION:An anode terminal 32 is sticked with an insulating adhesive agent to the hole made in the side portion of a front glass container 9 as it always contacts with a metal backed layer 30. There are no restrictions on the shape and length of an anode terminal 32, and an anchor hole 32a is made in the contact portion with the metal backed layer 30, and there are no restrictions on the size, shape and number of the anchor hole. The adhesive strength with the metal backed layer 30 is therefore increased, so that it is possible to surely increase the voltage of the metal backed layer. When the anode terminal 30 is installed with an insulating adhesive agent, a process where a high temperature condition is continuously kept can be decreased by once by passing the anode terminal 32 through a high temperature atmosphere after it is coated with paste-like conductive material, and an image display unit whose mass-productivity is high can be obtained at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to image display in video equipment.

Conventional technology Conventionally, cathode ray tubes have been mainly used as color television image display devices, but cathode ray tubes are much longer in depth than the screen, making it impossible to manufacture flat-screen television receivers. there were. Therefore, EL display elements, plasma display elements, liquid crystal display elements, and the like have been developed as display elements on a flat panel, but all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility. Therefore, with the aim of displaying high-quality images comparable to those on a cathode ray tube using a flat-panel device that uses electron beams, the screen is divided into matrix-like sections without gaps, and the electron beam is applied to each section. This is an image display device that emits phosphors through deflection scanning and forms a color television image as a whole. An example of the conventional image display device mentioned above will be described below with reference to the drawings.

FIG. 3 shows the configuration of a conventional image display device. In Figure 3, l is a back electrode, 2 is a line cathode as an electron beam source, 3 is an electron beam extraction electrode, 4 is a signal electrode, 5 and 6 are focusing electrodes, 7 is a horizontal deflection electrode, and 8 is a vertical deflection electrode. Yes, these components are assembled into a front glass container 9,
It is housed in a rear container 10 and the inside of the container is evacuated. The wire cathode 2 is stretched horizontally so as to generate an electron flow that is uniformly distributed in the horizontal direction.
is a plurality of lines in the vertical direction at appropriate intervals (here, 2~
(Only 4 pieces of 22 are shown). These f! The cathode is constructed by, for example, applying an oxide cathode material to the surface of a tungsten wire. The back electrode l is made of a flat conductive material and is provided in parallel to the line cathodes 2i to 22. The extraction electrode 3 is made of a conductive plate that faces the back electrode 1 via the line cathodes 2a-22 and has a row of through holes 11 provided at appropriate intervals in the horizontal direction on a horizontal line facing each line cathode. [Through hole 1] is circular in the embodiment, but may be oval or rectangular, or may be slit-shaped. The signal electrode 4 is composed of a row of vertically elongated conductive plates 12 arranged at predetermined intervals at positions facing each of the through holes 11 in the extraction electrode 3, and each conductive plate 12
The lii plate has a similar through hole 13 at a position opposite to the through hole 11 of the extraction electrode 3.
The shape of the focusing electrode 5 may be an ellipse or a rectangle, or may be a vertically elongated slit.
It consists of a conductive plate with The shape of the through hole 14 is circular.

It may be oval or slit-shaped. The focusing electrode 6 has a vertically connected slit hole 15 at a position facing the through hole 14 of the focusing electrode 5 . The shape of the slit hole 15 may be round, oval, or rectangular. The horizontal deflection electrodes 7 include two electrodes interlocked with each other at appropriate intervals on the same plane.
A space 1 formed between the conductive plates 16 and 17, which is composed of conductive plates 16 and 17 connected at comb-shaped ends.
8 faces the through slit hole 15 of the focusing electrode 6. The vertical deflection electrode 8 is made of conductive plates 19.20 connected at their ends, that is, two comb-shaped conductive plates 19.20, which are interlocked with each other at an appropriate interval on the same plane as shown in FIG. Consisting of: The screen 21 is constructed by coating the inner surface of the glass container 9 with a phosphor 22 that is emitted by electron beam irradiation, and adding a metal back layer (not shown) thereon. In addition, the drawer mentioned above [knob 3. Signal electrode 4. Focusing electrodes 5 and 6. Horizontal deflection electrode7. The vertical deflection electrodes 8 are each made of an insulating adhesive (not shown here).
are joined to form a negative electrode block 24.

In addition, the linear cathode 2 is attached to the back electrode l using a member (not shown) with appropriate spacing;
The electrode block 24 is insulated and fixed to form an integrated electrode unit 26. Further, the electrode unit 26 is fixed to a fixing base 27 fixed to the rear container 101 using, for example, screws 28 at appropriate intervals so as to be parallel to the rear container 101.

The operation of the image display device configured as described above will be briefly described.

First, a heater current is applied to the wire cathode 2 to heat it to facilitate electron emission. In the heated state, the back electrode 1, the wire cathode 2.
A suitable voltage is applied to the extraction electrode 3 to emit a sheet-like electron beam from the surface of the linear cathode 2. The sheet-like electron beam is divided into a plurality of parts by the through hole II of the extraction electrode 3, and becomes a large number of electron beam streams 23. The electron beam flow 23 has a passing amount adjusted individually by the signal electrode 4 according to the video signal applied to the signal electrode 4.The electron beam passing through the zero-order signal electrode 4 is After being focused and shaped by the electrostatic lens effect of the through hole 14.15 of the focusing electrode 5.6, the adjacent conductive plates 16 of the horizontal deflection electrode 7
．． 17 and the adjacent conductor 1ft4Ji, 1 of the vertical deflection electrode 8
9.20 is deflected horizontally and vertically by the potential difference applied. Further, a high voltage (for example, 1 (IKV)) is applied to the metal back layer of the screen 21, and the electron beam is accelerated to high energy and collides with the metal back.
The phosphor 22 is caused to emit light.

When a television screen is divided vertically and horizontally into a matrix to form a collection of subsections 75, one electron beam separated as described above is associated with each subsection, and the electron beam is divided into each subsection. Only deflection.

When scanning, the entire image can be displayed on the screen. Furthermore, by controlling RGB video signals corresponding to each pixel using the signal electrodes 4, television moving images can be reproduced.

FIG. 4 is a detailed view of the front glass container 9 of a conventional image display device. In FIG. 4, 29a, 29b, 29c
, 29d is an anode terminal, 30 is a metal back layer, 22
is a phosphor, and 31 is an insulating adhesive.

The anode terminals 29a and 29c are made of an insulating adhesive 31.
are fixed to the front glass container 9 by the anode terminals 29a and 29b, 29b and 29c, 29c and 29d.
are joined by spot welding or the like.

Furthermore, the anode terminal 29d is in contact with the metal back layer 30 due to its elasticity.

Problems to be Solved by the Invention However, in order to obtain high-quality images in the above-described configuration, there are the following problems in the manufacturing process. Conventionally, the anode terminals 29a and 29b are welded,
After attaching the anode terminal 29c to the front glass container 9 at high temperature with an insulating adhesive 31, the anode terminals 29b and 29c, 29c and 29d are welded, and a paste-like conductive material (here, After coating (not shown), the sample was further passed through a high temperature atmosphere in order to evaporate the organic solvent contained therein. In this way, there were problems such as inability to mass produce and high costs.

The present invention solves the above problems and provides an image display device that can always stably obtain high-quality images.

Above are the means to solve the problem! lIi! I! In order to solve the problem, the image display device of the present invention uses an anode terminal provided with an anchor hole in the adhesive part of the metal back layer to reliably apply a high voltage to the metal back layer.

Function The function of the present invention is to attach the anode terminal, which has an anchor hole in the metal back layer adhesive part, to the glass container using an insulating adhesive so that it is always in contact with the metal back layer, and at the same time apply a paste-like conductive substance to the anode terminal. Since the bonding area is large because the metal back layer is coated with a high voltage, it is possible to reliably apply a high voltage to the metal back layer, and because it only needs to be passed through a high temperature condition once, it is possible to provide high quality images at low cost. DESCRIPTION OF THE PREFERRED EMBODIMENTS An image display device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of a front glass container of an image display device according to an embodiment of the present invention, and FIG. 2 shows an enlarged sectional view of an anode terminal mounting portion.

1 and 2, reference numeral 32 indicates an anode terminal according to an example of the present invention, and while maintaining constant contact with the metal back layer 30, an insulating adhesive is applied to the hole in the side surface of the front glass container 9. It is fixed at 31. Here, anode terminal 3
There are no restrictions on the shape and length of metal back layer 3.
An anchor hole 32a is provided at the contact part with the metal back layer 30, and the front glass container 9
It is sufficient if it is fixed to . Anchor hole size and shape 1
There is no limit to the number. When attaching the anode terminal 32 with an insulating adhesive 31, a paste-like conductive substance 33 is used.
Since the material is also coated and passed through a high-temperature atmosphere, the process of passing through a high-temperature state can be eliminated by one step. Note that the anchor hole 32a
Therefore, the adhesive strength with the metal back layer 30 is increased, and the metal back layer 30 can be reliably subjected to high pressure.

Effects of the Invention According to the present invention, when attaching an anode terminal with an insulating adhesive, a paste-like conductive substance is also applied and passed through a high temperature atmosphere, so the process of passing through a high temperature state can be reduced by one step. As a result, the number of man-hours can be reduced, and a low-cost image display device that is highly mass-producible can be obtained.

FIG. 2 is a perspective view of the front glass container portion of the device; FIG. 2 is an enlarged sectional view when the anode terminal of the present invention is attached; FIG. 3 is a partially exploded perspective view showing the configuration of a conventional image display device; The figure is a perspective view of a front glass container when a conventional anode terminal is used.

9...Front glass container, 30...Metal back layer, 31...Insulating adhesive, 32...
... Anode terminal, 32a ... Anchor hole, 33 ... Conductive substance.

Agent's name: Patent attorney Akira Okaji and 2 others" - A-side Gakusuke 4! 10th Q - Elevated glass view 1 shi JO - Metal and book layer 33 - Homare also 1 PL 9 Mio 2 tons

Claims (1)

[Claims] A front glass container whose inner surface is coated with a phosphor and a back container facing the front glass container are provided, and a plurality of back electrodes made of one conductive plate are provided in a space sandwiched between the back container and the front glass container. In an image display device equipped with a line cathode, an extraction electrode made of one or more conductive plates, a signal electrode, a focusing electrode, a horizontal deflection electrode, and a vertical deflection, a metal back of an anode terminal attached to the front glass container. An image display device characterized by having an anchor hole in a layer adhesive part.