JPH0456049A - Image display device - Google Patents

Abstract

PURPOSE:To prevent sputtering and enhance the reliance upon welding by furnishing a hood on a lens unit for laser, consolidating them, and installing a holding member to hold the weld part of a terminal. CONSTITUTION:To join a signal electrode 51 with a signal electrode terminal 50, a jig 56 to hold a terminal 50 is inserted under the header part of the signal electrode terminal 50 in such a way that the terminal 50 will not bend. The jig 56 is provided with a notch to admit the minor dia. part of the terminal 50, and its major dia. part is borne from below. A hood 58 is provided in a single piece with a lens unit 57 for laser welding of the terminal 50 with the signal electrode 51, and is pressed to eliminate the gap between the terminal 50 and electrode 51, which is followed by irradiation with laser 59 to make welding in the condition that they are in tight contact. Besides the hood 58, evacuation 60 prevents sputtering with welding.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an image display device in video equipment and a terminal device thereof.

2. Description of the Related Art A conventional image display device will be described with reference to FIG. In FIG. 4, 6 is a back electrode, 72 is a line cathode as an electron beam source, 8 is an electron beam extraction electrode,
9 is a signal electrode, IO is a first focusing electrode, 11 is a second focusing electrode, 12i, 120 is a horizontal deflection electrode, 13i, 130
is a vertical deflection electrode, and these components are housed in a front glass container 14 and a rear metal container l, with containers 1 and 14
There is a vacuum inside.

The wire cathode fins 72 are stretched in the horizontal direction so as to generate an electron charge with a current density distribution that is approximately -like in the horizontal direction.
A plurality of them are provided in the vertical direction at appropriate intervals (in this embodiment, only four, ie, 70, 7c, and 72 are shown). These wire cathode fins 72 are constructed, for example, by coating the surface of a tungsten wire with an oxide cathode material. The back electrode 6 is made of a flat conductive material and is provided parallel to the line cathode fins 72. The extraction electrode 8 is made of a conductive plate that faces the back electrode 6 via the line cathode fins 72 and has a row of through holes 15 provided at appropriate intervals in the horizontal direction on a horizontal line facing each line cathode. 6 The through hole 15 is circular in this embodiment, but may be elliptical or rectangular, or may be slit-like like the extraction electrode in the conventional embodiment described above. It consists of a row of vertically elongated conductive plates 17 arranged at predetermined intervals at positions facing each other in the horizontal direction, and in each conductive plate 17, a through hole 15 of the extraction electrode 8 is connected to the conductive plate 17. Similar through holes 16 are provided at opposing positions. The shape of the through hole 16 may be an ellipse or a rectangle, or it may be a vertically elongated slit like the signal electrode in the conventional embodiment described above. The first focusing electrode 10 is made of a conductive plate having through holes 18 at positions facing each through hole 16 of the signal electrode 9 . The shape of the through hole 1B may be a circle, an ellipse, or a slim shape. The second focusing electrode 1 has a vertically connected slit hole 19 at a position opposite to the through hole 18 of the second focusing electrode 10. The shape of the slit hole 19 may be round, oval, or similar to the through hole 1B of the first bundled electrode 10.
Horizontal deflection electrodes 12 and 120 may be rectangular.
are 2 meshed with each other on the same plane with an appropriate space between them.
The space 20 created between the horizontal deflection electrodes 12 and 120 is opposite to the through slit hole 19 of the second focusing W8ill. facing. Vertical deflection electrode] 3.

130 is 23.24? The conductive plates shown here are connected at their sharp edges, that is, two comb-like conductive plates are interlocked with each other at appropriate intervals on the same plane. is the lower conductive plate 2
3 and the upper conductor plate 24 form a pair of vertical deflection electrodes. The screen 2G is constructed by coating the inner surface of the glass container 14 with a phosphor 27 that emits light when irradiated with an electron beam, and adding a metal back layer (not shown) thereon.

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

First, apply voltage 1 to the back electrode 6. A voltage (2) higher than (1) is applied to the extraction electrodes 8, respectively. Furthermore, V,<V when a heater current is applied to heat the wire cathode and make the electron emission possible. 〈■, the appropriate voltage■. When applied to the line cathode ray, the electric field on the line cathode surface becomes positive, and a stream of electrons is emitted and accelerated toward the extraction electrode 8. Another example is ■. 〉■, the voltage becomes ■. When applied to the line cathode ray, the electric field on the line cathode surface becomes negative and electron emission can be suppressed. Therefore, by individually controlling the voltage of the line cathodes, 707
. . . is repeated in order to emit an electron beam for a certain period of time, and a sheet-shaped electron beam having a uniform current density distribution in the horizontal direction can be generated for each line cathode. The above-mentioned sheet-like electron beam is then horizontally divided into a plurality of parts by the through hole 15 of the extraction electrode 8, and further becomes a large number of electron beam rows, which are formed into a signal line 8i.
+9 reaches the through hole 16, but at this time, the signal electrode 9
If the voltage ■, is set to V 3 > Vo, the electron beam passes through, and V, <V.

If so, the electron beam will lose its commuting energy and will not be able to pass through it. Therefore, by controlling (1) over time, the amount of electron beam passage is adjusted individually for each electron beam in accordance with the video signal for displaying the picture element.

The electron beam that has passed through the signal electrode 9 then passes through the first focusing electrode 1
0. It reaches the second globular bundle electrode 11, and the through hole 1B.

After being focused and shaped by the electrostatic lens effect of the slit hole 19, the light is focused between adjacent conductive plates 23 and 24 of the horizontal deflection electrodes 12a and 120 and between adjacent conductive plates 23 and 24 of the vertical deflection electrodes I3a and 130. horizontally and vertically by the potential difference (called the deflection voltage) applied to lr? Electricity is deflected. Further, a high voltage (for example, 10 KV) is applied to the metal back layer of the screen 26, and the electron beam is accelerated to high energy and collides with the metal back, causing the phosphor to emit light.

When the television screen is divided vertically and horizontally into a matrix to form a collection of subdivisions 2B, one electron beam split as described above is associated with each subdivision, and each electron beam is By deflecting and scanning only within a small section, the entire image can be displayed on the screen. Further, by controlling the ROB video signal corresponding to each picture element over time using the signal electrode voltage as described above, a television moving image can be reproduced.

Problems to be Solved by the Invention In such an image display device, the signal electrode terminal 130
As shown in FIG. 5, they are integrated with a metal base 131 having a stepped portion and a flange through a glass 132, and a plurality of bases are attached to the metal base 131. This integrated plurality of signal electrode terminals 13
0 is attached to the rear metal container 133 by welding to ensure positional accuracy.

Corresponding to this terminal 130, the signal electrode 134 is also cut to match the position of the terminal 30. Laser welding is performed to electrically connect the terminal 130 and the signal electrode +34, but spatter 136 caused by the laser 135 is scattered.
The second scattered spatter 136 firmly adheres to the electrode group 137,
When displaying an image, the beam charges the sputter 136, making it impossible to display the image, resulting in image defects.

In view of the above problems, the present invention provides an image display device that prevents spatter from scattering and also improves the reliability of welding.

Above are the means to solve the problem! In order to solve the problem of 1141, the image display device of the present invention provides a hood on the laser lens unit and integrates it, and also provides a support member for supporting the welded part of the terminal, thereby reducing the gap. This allows for reliable welding.

Effect of the Invention With the above-described configuration, the present invention can integrate the hood with the lens unit to prevent spatter from scattering during welding, and furthermore, a supporting member is provided at the welded part of the terminal, so that the hood and the receiving part can be integrated. The signal electrode and the terminal are reliably held between the holding members, thereby eliminating gaps and ensuring laser welding.

Example Below, regarding an image display device according to an example of the present invention,
This will be explained with reference to the drawings. Figure 1 is a sectional view showing the state of laser welding of the signal electrode and terminal, and Figure 2 is a plan view showing the state of attachment of the wire cathode terminal, signal electrode terminal, and other terminals to the rear metal container. , FIG. 3 is a sectional view showing how the signal electrode terminal is attached.

In FIG. 2, 35 is a rear metal container, and 42 is a signal electrode terminal. As shown in an enlarged view in FIG. 3, the signal electrode terminal 42 is integrated with a metal base 43 having a stepped portion and a flange through a glass 45.
A plurality of favorites are attached to a metal base 43.

This ensures mutual positional accuracy of the signal electrode terminals 42. Further, the insulation between the signal iii terminal 42 and the rear metal container 35 is maintained by the glass 45. This structure also maintains confidentiality. The signal electrode terminal 42 is connected to a hole 39 in the rear metal container 35.
By opening it, it is positioned so as to penetrate it from the inside to the outside. This integrated metal base 4
A laser 40 is irradiated onto the flange portion of No. 3 to melt the metal base 43 and the rear metal container 35. This melting part 4
1 around the entire periphery of the flange of the metal base 43, the metal base 43 is bonded to the rear metal container 35. That is, the signal electrode terminal 42 is bonded, and sealing performance is maintained.

Also, this terminal is installed from the inside of the space consisting of the front glass container 14 and the rear metal container 1 (35). (35) is attached. Also, the wire type electrode terminal 36 is similar to the signal electrode terminal 42, and is integrated with a metal base 37 having a stepped portion and a flange as shown in FIG. base 3
It is attached to 7. Similarly to the signal electrode terminal 42, the line cathode terminal 36 is positioned by making a hole in the rear metal container 35 so as to pass through it from the inside to the outside. This metal base 37 and the rear metal container 35
The metal base 37 is irradiated with a laser to melt the melted part.
By forming the line cathode terminal 36 around the entire periphery of the rear metal container 35, the wire cathode terminal 36 is adhered to the rear metal container 35 and sealing performance is maintained.

As a result, the signal electrode terminal 42, the line cathode terminal 36, and the rear metal container 35 are integrated.

The connection between the integrated signal electrode terminal 50 and the signal electrode 51 is as shown in FIG. The signal electrode 51 in the electrode group is cut to match the length at the joint with the signal electrode 50, and the signal electrode 51 and the signal electrode terminal 5 are cut to match the length at the joint part.
In order to join 0, a jig 56 for receiving the terminal 50 is inserted under a part of the header of the signal electrode terminal 50 on a key board in which the signal electrode terminal 50 does not bend. The jig 56 has a cutout into which the small diameter portion of the terminal 50 is inserted, and supports the large diameter portion of the terminal 50 from below. The jig 56 can be configured, for example, in a comb shape. After that, the lens unit 5 is welded to the signal electrode terminal 50 and the signal electrode 51 by laser welding.
7 is integrated with the hood 5B, and in order to eliminate the gap between the signal electrode terminal 50 and the signal electrode 51, the hood 58 is pressed,
By irradiating the laser 59, the signal electrode terminal 50 and the signal electrode 51 can be welded in close contact with each other. Also, in order to prevent spatter and ivy from scattering during this welding, a hood 58 is installed.
In addition, a vacuum 60 is provided to prevent spatter scattering. Furthermore, a protective glass 61 is also integrated into the hood 58 to protect a lens (not shown) that condenses the laser beam.

Effects of the Invention As described above, the present invention has a structure in which, when laser welding a signal electrode and a signal electrode terminal, the hood is integrated with the lens unit of the laser, and the signal electrode and the terminal hood are held between the supporting members. , reliably suppresses the welding process without gaps, improving welding reliability.

Furthermore, since the inside of the foot F' is evacuated by providing the foot', there is no scattering of spatter and there is no possibility of it adhering to the electrode. Therefore, it is possible to use an image display device that improves welding reliability and eliminates image defects caused by beam charging.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the connection state of the signal electrode terminal and the signal electrode of the image display device in embodiments of the present invention, and Fig. 2 shows the line cathode terminal and signal connection to the rear metal container of the image display device. A plan view showing the installation status of the electrode terminal and other terminals, Figure 83 is a sectional view showing the details of welding between the metal base of the signal electrode terminal and the rear metal container of the device, and Figure 4 is an image display. FIG. 5 is an exploded perspective view showing the basic structure of the device, and a cross-sectional view showing the state of connection between signal electrode terminals and signal electrodes of a conventional image display device. 50... Signal electrode terminal, 51... Signal electrode, 56... Jig, 57... Lens unit, 58... Foot, 59...
Laser, 60... vacuum. Name of agent: Patent attorney Shigetaka Awano No. 1 Figure y-Off-men gold Denmenri Yonnie Dai-・Signal-to-grind-go-・-is based on--forces

Claims (1)

[Claims] It includes a flat screen coated with phosphor and a back electrode made of a conductive plate facing the screen,
In the space sandwiched between the back electrode and the screen, in order from the back electrode side, a line cathode, a beam extraction electrode,
It is equipped with a signal electrode, a focusing electrode, a horizontal deflection electrode, and a vertical deflection electrode, and also includes a front glass container and a rear metal container for storing the screen, the line cathode, and the various electrodes in a vacuum state, and at least the line cathode terminal and the signal electrode terminal. are fixed to a metal base through glass, this metal base is welded to the rear metal container, and the line cathode and signal electrode terminals are taken out from the inner surface of the rear metal container by penetrating the rear metal container. In this image display device, when laser welding signal electrodes and terminals, the hood is integrated with the laser lens unit, and the signal electrodes and terminals are sandwiched between the hood and the holding member for welding. Characteristic image display device.