JPH02295037A - Image display - Google Patents

Abstract

PURPOSE: To provide an electrode assembly suitable for mass production by providing the first and second contact faces in one electrode, providing the third and fourth electrodes in the other electrode, and extending the first and second boundary layers made of insulating material between the first and third contact faces and between the second and fourth contact faces. CONSTITUTION: The first and second contact faces 81, 82 are provided in one electrode while the third and fourth contact faces 83, 84 are provided in the other electrode, while the first and second boundary layers 85, 86 made of insulating material are extended between the first and third contact faces 81, 83 and between the second and fourth contact faces 82, 84, and the first boundary layer 85 is brought into contact with the first and third contact faces 81, 83 while the second boundary layer 86 is brought into contact with the second and fourth contact faces 82, 84, and consequently, an assembly is formed. For example, electrodes 11-15 are provided with rising edges and flat faces provided with apertures through which electron beams 6 are passed. A polyimide resin boundary layer 23 is extended between the rising edges and is brought into contact with these rising edges. In a lug 24 from the electrode 11, an electric contact may be arranged. In this way, a device suitable for mass production can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention comprises means for emitting a row of electron beams, an electron optical device for the electron beam, and a display screen, the electron optical device comprising at least two The present invention includes an assembly of electrodes for an image display device having a picture tube with an aperture for passage of an electron beam.

(Prior Art) An image display device of the type mentioned above is disclosed in European Patent Application No. 0.
No. 288,094.

In conventional image display devices, the electro-optical device has electrodes that are stacked and connected to conductive pins. In certain embodiments, the electron beam corresponds to a vertical row of the image. Image display devices having such electro-optical devices are hardly suitable for mass production. There is a high risk of being hit.

OBJECTS OF THE INVENTION The object of the present invention is to provide an image display device of the type mentioned at the outset, which is more suitable for mass production.

(Means for Solving the Problems) In order to achieve the above object, the image display device of the present invention has the following features. That is, one electrode has first and second contact surfaces, the other electrode has third and fourth contact surfaces, and first and second boundary layers of insulating material form first and third contact surfaces, respectively. a first contact surface extending between the second and fourth contact surfaces;
A boundary layer is in contact with the first and third contact surfaces, and a second boundary layer is in contact with the second contact surface.
and the fourth contact surface. Electrode assemblies can be easily made in this way.

Another advantage is that the assembly is mechanically more stable and less sensitive to microphone noise.

Preferably, the first and second contact surfaces lie in different planes.

In this case, the assembly is more stable and less susceptible to microphone noise.

In one embodiment of the image display device of the invention, the first and second electrodes each have a flat surface with an aperture for the passage of electrons, the two edges are located obliquely to the flat surface, and the contact surface is Consists of edges such as.

The boundary layer extending between the contact surfaces and extending obliquely over these surfaces has no or little charge.

Boundary layer charging can cause aberrations in the electron beam path.

Preferably, the first and second electrodes have a U-shaped cross section. It is easy to stack the electrodes and there is less risk of the electrodes shifting relative to each other during manufacture of the electro-optical device.

In one embodiment of the invention, the electrode is folded along a fold line.

It is possible to assemble electrodes suitable for the image display device of the invention from separate component parts, for example by welding the sheet-shaped parts together. It is easier to make a suitable electrode by folding it along the fold line. Preferably, this fold line is a perforation.

In one embodiment of the image display device of the present invention, the first and second boundary layers connect the electrodes to each other. In another embodiment of the image display device of the invention, the first and second boundary layers are made of polyimide.

In one embodiment of the image display device of the present invention, the first and second electrodes have alignment apertures.

Electrodes can be easily aligned with these alignment apertures.

(Example) The present invention will now be described by way of example with reference to the accompanying drawings.

FIG. 1 shows a conventional image display device in cross section. The image display device 1 has a container 2 having a face plate 3 with a display screen 4 provided inside. Furthermore, this image display device 1 includes a generation system 5 for generating a row of electron beams 6, which generation system has a number of emitting elements 7 and an electro-optical device 8. The electron optical device accelerates the electron beam 6 emitted by the emitter 7. In this example, the electron beam exits the electro-optical device 8 such that the beam is parallel to the display screen 4. These electron beams 6 are then deflected onto the display screen 4 by deflection electrodes 9 . In this example, shadow mask 10
is placed in front of the display screen 4.

2 and 3 show a part of the electro-optical device 8 in a perspective view and a sectional view, respectively. Electro-optical device 8 includes aperture + Ila, 12a, 13a, 14a and 14
It has a large number of electrodes 11 to 15 with a base plate 16, and a large number of conductive pins 17 to 20 connected to a large number of conductive strips 17a to 20a, respectively. The emitting element 7 is connected to a conductive strip 7b via a connecting line 7a. The bottle and the electrode are mechanically connected to each other by a glass connection 21 and electrically connected to each other by a conductive connection 22.

Image display devices equipped with such electro-optical devices are hardly suitable for mass production. The electrodes must be properly aligned with the electron beam in both directions diagonal to the electron beam. If one pin is bent or positioned incorrectly, it will be impossible to accurately position the electrode. Measures must be taken to prevent the conductive bottle from coming into contact with the ``wrong'' electrode.To create the glass joint, the glass must be heated to the pour point, which takes time. Afterwards, thermal stresses occur which can, among other things, break the pin or disturb the position of the electrode. An object of the present invention is to obtain an image display device that is more suitable for mass production.

FIG. 4 shows a perspective view of a portion of the image display device of the present invention.

Electrode LL 12. 13. 14 and 15 are profiled and have a raised edge and a plane with an aperture through which the electron beam 6 passes. A boundary layer 23 of insulating material, in this example polyimide resin, extends between and contacts the raised edges.

These polyimide resin layers electrically insulate the electrodes.

The boundary layer is defined by AffzO deposited on one of the electrodes involved.
It is also possible to form it with three layers. The polyimide resin layer has AI in that the electrodes can also be connected to each other via the polyimide resin layer. It has advantages over the zo's layer.

The electrodes 11 to 15 are provided with lugs 24. These lugs can easily be provided with electrical contacts.

Electrode IL 12, 13. The assembly of 14 and 15 is easy to make, forms a strong whole, electrical contacts are easily provided, and is not very sensitive to microphone noise. This electrode assembly is supported and insulated by a support 25.

FIG. 5 is a sectional view of another embodiment of the image display device of the present invention.

This drawing shows the electrodes 26 to 33 and the electron beam emitting element 7.
shows. The electrodes are separated by an insulating boundary layer 34. These insulating boundary layers extend between the rising edges of the electrodes, ie in a plane parallel to the electron beam, as in FIG.

Charging of the insulating boundary layer 34 is thereby prevented. The final electrode 33 is an anode. The electrode 32 has a rounded edge 35.
will be provided. This reduces the risk of flashover.

FIG. 6 shows a flat sheet 36 that is folded into a U-shaped electrode. This flat sheet includes a row of apertures with two alignment apertures 38 and 39 and another row of apertures 37 through which the electron beam passes, and fold lines 40 and 4.
1 is provided. These apertures 37. 38 and 39 and fold lines 40 and 41 can be obtained by etching, electrical discharge machining, drilling, laser or other suitable methods.

The fold lines 40 and 41 can be lines whose thickness is thinner than the thickness of the remaining electrode. Preferably, the bending line is a perforation. Electrodes shaped from such flat sheets can be easily bent. Bending line 40
An elongated die or flat sheet 36 having a width approximately equal to the spacing between and 41 is pressed onto the rubber cushion. The edges of the flat sheet are thereby folded along fold lines 40 and 41 to form a shaped, in this example U-shaped, electrode.

FIG. 7 shows a method of assembling an electro-optical device suitable for the image display device of the present invention.

Electrodes 44 and 4 with alignment apertures 46 and 47
5 is placed on a base plate 42 with pins 43. Electrodes 44 and 45 are separated by spacer 48 . Electrodes 44 and 45 are connected to each other by polyimide resin insulation layers 49 and 50. Thereafter, pin 43 and spacer 48 are removed.

Figures 8a to 8g each show cross-sectional views of different embodiments of electrode assemblies suitable for the image display device of the present invention. Similar to the embodiments already shown, in all these embodiments the first electrode is provided with contact surfaces 81 and 82, which in these embodiments extend in different planes, and the second electrode is provided with contact surfaces 81 and 82, which in these embodiments extend in different planes. Contact surfaces 83 and 84 are provided, with contact surfaces 81 and 83 and contact surfaces 82 and 84 being separated by insulating boundary layers 85 and 86, respectively.

It will be apparent to those skilled in the art that many modifications can be made without departing from the spirit of the invention.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a conventional image display device, FIG. 2 is a perspective view of a part of an electro-optical device of a conventional image display device, and FIG. 3 is a part of an electro-optical device of a conventional image display device. 4 is a perspective view of a part of the electro-optical device of the image display device of the present invention, FIG. 5 is a sectional view of the electro-optical device of the image display device of the present invention, and FIG. 6 is a shaped FIG. 7 is a cross-sectional view illustrating a method of assembling an electro-optical device suitable for use in the image display device of the present invention, and FIGS. 8a to 8g are plan views of a flat sheet that can be bent into electrodes. 3A and 3B are cross-sectional views of different embodiments of electrode assemblies, each suitable for use in the image display device of the present invention. 4... Display screen 6... Electron beam 7.
... Emitting element 8 ... Electron optical device 11 -
15. 26-33, 44. 45...electrode 23,
34, 50, 85. 86... Insulating boundary layer 37
···aperture

Claims (1)

Claims: 1. Means for emitting a row of electron beams, an electron beam electron optics device, and a display screen, the electron optics device having an assembly of at least two electrodes; In an image display device having a picture tube with an aperture for the passage of a beam, one electrode has first and second contact surfaces and the other electrode has third and fourth contact surfaces.
a contact surface, first and second boundary layers of insulating material extending between the first and third contact surfaces and the second and fourth contact surfaces, respectively, the first boundary layer extending between the first and third contact surfaces; An image display device, wherein the second boundary layer contacts the contact surface and the second boundary layer contacts the second and fourth contact surfaces. 2. The image display device of claim 1, wherein the first and second contact surfaces are in different planes. 3. The first and second electrodes each have a plane with an aperture for passage of electrons, and have two edges extending obliquely to the plane, and these edges constitute a contact surface. The image display device according to item 2. 4. The image display device according to claim 3, wherein the first and second electrodes have a U-shaped cross section. 5. The image display device according to claim 3 or 4, wherein the electrodes are bent along the bending line. 6. The image display device according to claim 5, wherein the bending line is a perforation. 7. Claim 1, wherein the first and second boundary layers connect the electrodes to each other.
7. The image display device according to any one of items 6 to 6. 8. The image display device of claim 7, wherein the first and second boundary layers are made of polyimide resin. 9. The image display device according to claim 1, wherein the first and second electrodes are provided with alignment apertures.