JPS6161347A - Picture display device - Google Patents

Abstract

PURPOSE:To improve reliability of a flat type picture display device without using adhesive etc., by forming the system furnishing a metallized land on the vertical deflection electrode over which multidivided tips of the voltage applying terminals are welded. CONSTITUTION:A vertical deflection electrode to be incorporated in a flat type picture display device is formed by inserting and locating plural electrodes 32 with conductive membranes 37 in grooves of the frame 31, and further furnishing voltage applying terminals 33 and 34, turndown processed to give plural tips 35. In this case, a metallized land 36 of Ni etc. is placed at the position to be continued to be terminals 33 and 34 of the electrode 32, to which tips 35 of the terminals 33 and 34 are contacted to continue by spot- or laser-welding. Therefore, the system can be simplified, as well as a highly reliable composition is possible because no conductive adhesive etc. are used.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image display device for video equipment.

Conventional configurations and their problems Traditionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes have a much longer depth than the screen, making it difficult to use for thin TVs. It was impossible to build a John receiver.

In addition, although EL display elements, plasma display devices, liquid crystal display elements, etc. have recently been developed as flat display elements, all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display. , it has not yet been put into practical use. Therefore, we aimed to achieve a device that can display color television images on a flat display device using electron beams, and we divided the screen vertically into multiple sections. The electron beam is deflected vertically for each section to display multiple lines, and is further divided horizontally into multiple sections to display R, G,
B etc.

The R, G phosphors are made to emit light sequentially.

A television image is displayed as a whole by controlling the amount of electron beam irradiation onto a phosphor such as B using a color video signal. The conventional image display element is the first
As shown in the figure, in order from the rear to the front, a back electrode 1, a line cathode 2 as an electron beam source,
Vertical focusing electrode 3゜3', vertical deflection electrode 4, electron beam flow control electrode 5, horizontal focusing electrode 6, horizontal deflection electrode A, horizontal focusing electrode 6', electron beam accelerating electrode 8 and glass container 9,
22 is arranged, and the components are housed in the glass container and evacuated. A line cathode 2 serving as an electron beam source is stretched horizontally so as to generate an electron beam distributed linearly in the horizontal direction. So 2i~2
(Only four of the two are shown). In this embodiment, it is assumed that 15 pieces are provided, and 2I to 2Y are provided. These wire cathodes 2 are constructed by applying an oxide cathode material to the surface of a tungsten wire having a diameter of 10 to 20 μm, for example. Then, as will be described later, the electron beams are controlled to be emitted sequentially from the upper line cathode 2a for a fixed period of time. The back electrode 1 suppresses the generation of electron beams from other line cathodes 2 other than the line cathode 2 which is controlled to emit an electron beam for a certain period of time, which will be described later, and directs the generated electron beam only in the forward direction. It has the effect of pushing out toward the target. The back electrode 1 may be formed by a coating film of a conductive material adhered to the inner surface of the back wall of the glass pulp. In addition, a planar electron beam emitting cathode may be used as the line 9 between the back electrode 1 and the line cathode 2. The vertical focusing electrode 3 is long in the horizontal direction facing each of the line cathodes 2a to 2yo. slit 1
The electron beam emitted from the line cathode 2 is taken out through its slit 1o and focused in the vertical direction. The slit 1o may be provided with crosspieces at appropriate intervals in the middle, or may be a row of through holes provided horizontally at small intervals (so that they almost touch each other). Alternatively, it may be configured as a slit. The vertical focusing electrode 3' is also similar. A plurality of vertical deflection electrodes 4 are arranged horizontally at intermediate positions between the slits 1o, and are provided on the upper and lower surfaces of the insulating substrate 12, respectively.
13' is provided. Then, a vertical deflection voltage is applied between the opposing conductors 13 and 13' to deflect the electron beam in the vertical direction.

In this configuration example, the pair of conductors 13 and 13'
The electron beam from the book line cathode 2 is vertically deflected to a position corresponding to 16 lines. And 16 vertical deflection electrodes 4
Thus, 15 conductor pairs corresponding to each of the 16 wire cathodes 2 are constructed, and in the end, 24 conductor pairs are formed on the screen 21.
The electron beam is deflected so as to draw a zero horizontal line.

Next, the electron beam flow control electrodes 6 are composed of conductive plates 15 each having a vertically long slit 14, and a plurality of electron beam flow control electrodes 6 are arranged horizontally in parallel at predetermined intervals.

In the configuration example with 320 control electrode conductive plates 15a to 1
5n are provided (only 10 are shown in the figure)
. Each of the electron beam flow control electrodes 5 extracts the electron beam horizontally by dividing it into one picture element at a time, and controls the amount of electron beam passing therethrough in accordance with the video signal for displaying each picture element. Therefore, the electron beam flow control electrode 5
If 32020 pixels are provided, 320 picture elements can be displayed per horizontal line. In addition, in order to display images in color, each picture element is displayed with phosphors of three colors R, G, and B, and each electron beam flow control electrode 5 is provided with phosphors of R, G, and B.
Each video signal is added sequentially. Furthermore, 320 sets of video signals for one line are simultaneously applied to the 320 electron beam flow control electrodes 5, so that one line of video is displayed at one time.

The horizontal focusing electrode 6 is the slit 1 of the electron beam flow control electrode 5.
It consists of a conductive plate 17 having a plurality of vertically long slits 1θ (320 slits) facing 4, and focuses the electron beams of each picture element divided in the horizontal direction into a fine beam. Make it into an electron beam. The horizontal deflection electrode 7 is made up of a plurality of conductive plates 18 arranged vertically in the middle of each of the slits 16, and a horizontal deflection voltage is applied between each conductive plate 18 for each pixel. The electron beams are respectively deflected in the horizontal direction, and the R, G, and B phosphors are sequentially irradiated on the screen 21 to cause them to emit light. In this embodiment, the deflection range is the width of one picture element for each electron beam. The accelerating electrode 8 is composed of a plurality of conductive wires 19 provided horizontally at the same position as the vertical deflection electrode 4, and accelerates the electron beam so that it collides with the screen 21 with sufficient energy.

The screen 21 is constructed by coating the back surface of the glass container 9 with a phosphor 2o that emits light when irradiated with an electron beam, and adding a metal back layer (not shown).

The phosphor 20 corresponds to one slit 14 of the electron beam flow control electrode 5, that is, to each one horizontally divided electron beam.

On the other hand, phosphors of three colors R, G, and B are provided in pairs, and are applied in stripes in the vertical direction. In FIG. 1, broken lines drawn on the screen 21 indicate divisions in the vertical direction that are displayed corresponding to each of the plurality of line cathodes 2, and two-dot chain lines indicate each of the plurality of electron beam flow control electrodes 5. Shows the horizontal divisions displayed corresponding to. As shown in the enlarged circle in Fig. 2, one section divided by these two has R, G, and G for one pixel in the horizontal direction.
.

The B phosphor 20 has a width of 16 lines in the vertical direction. In addition, A in the figure is one division in the vertical direction,
B is one division in the horizontal direction.The size of one division is
For example, the horizontal direction is 1 eel and the vertical direction is 16B.

Note that in FIG. 1, the length in the horizontal direction is greatly enlarged relative to the length in the vertical direction for clarity. In addition, in this embodiment, only one pair of R, G, and B phosphors 2o is provided for one picture element for one electron beam flow control electrode 5, that is, for one electron beam. Of course, it is also possible to provide more than one picture element, and in that case, the electron beam flow control electrode 5 has two
RlG and B video signals for three or more picture elements are sequentially divided, and horizontal deflection is performed in synchronization with this. The above is the general principle of the image display device. Next, a method for manufacturing the above device will be explained with reference to FIG. The back electrode 1 to the horizontal deflection electrode 7 are fixed to each other at a predetermined distance and positioned in the in-plane direction of the electrodes by a coupling spacer 23 made of a metal material, and then housed in a glass container to display an image. The device is completed. Here, the positioning between the electrodes in the in-plane direction of the electrodes is performed with precision using the 1, 2°, 3.3', 4, 5, and 6.7 electrodes, the electron beam source holding means, and the accelerating electrode holding means (both not shown). This is done by a well-drilled positioning hole 24 and a positioning pin 25 that passes through the positioning hole 24 in common. When fixing each electrode, due to the manufacturing process, a method is adopted in which the area from the electron beam flow control electrode to the horizontal deflection electrode is divided into several units, each of which is fixed, and then the units are fixed together. . This is because the electron beam flow control electrode unit and the horizontal deflection electrode unit constitute electrical electrodes, so they must be divided into a part to which a 10 charge is applied and a part to which a negative charge is applied.However, these This is because the slit width of the pattern is extremely small and the plate thickness is extremely thin, so it is difficult to bake and fix the pattern in a divided state. Therefore, the electron beam flow control electrode and the horizontal deflection electrode are usually baked and fixed to form a unit, and then the electrode pattern is divided by a method such as a laser. As shown in FIG. 4 or FIG. 6, the conventional terminal output for voltage application of the vertical deflection electrodes is such that 16 vertical deflection electrodes 4 inserted into the fixed frame 26 are pressed against the reference side by springs or the like and positioned. After that, the terminals for voltage application are pulled out in the + (plus) and - (''! minus) directions, respectively.

Voltage application terminals 27 and 28 are fixed to the fixed frame 26 with adhesive frits, and the terminal tips 29 are provided for each vertical deflection electrode 4. The vertical deflection electrode 4 is provided with the conductor 13, 13' as described above, but if this conductor is made of, for example, Au or In2O3,
The conductor forming film is a thin film, and if the terminal 29 is brought into contact with the terminal 29, the conductor film 13° 13' will be peeled off, making it impossible to apply a voltage. Workability will also be very poor. Furthermore, the connection between the terminal tip 29 and the conductive film 13, 13' requires electrical continuity using the conductive adhesive 30 and cannot be cured without applying a heat cycle, which requires equipment such as an electric furnace and man-hours. This causes an increase in costs. Furthermore, since conductive adhesives contain resin, they have the biggest disadvantage as image display devices, such as the release of gas during long-term use and the inability to display images for long periods of time. Ta.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a terminal output for voltage application of the vertical deflection electrode by providing a fixing land which is metallized on the vertical deflection electrode, and furthermore, a plurality of voltage application terminal tips are provided. By adopting a configuration divided into two, it is an attempt to provide an inexpensive and highly reliable image display device.

Structure of the Invention The present invention provides a terminal output for applying voltage to a vertical deflection electrode.
The vertical deflection electrode has a structure in which a metalized fixing land is provided, and the tip of the voltage application terminal is divided into a plurality of pieces, and each of the plurality of pieces of the tip is placed on the above-mentioned fixing land in a spot or a spot. It is secured by welding with a wire etc., and has multiple voltage application terminal tips, so even if one comes off, continuity can be maintained by the other multiple tip terminals, so it is highly reliable. become. Furthermore, since the work is carried out at room temperature, there is no need for equipment such as an electric furnace, resulting in lower costs and safer work. In addition, from the standpoint of reliability, since we do not use materials containing resin components such as conductive adhesives, there is no generation of outgassing, and the images are stable over a long period of time. This has the unique effect of providing a display device.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. 6 to 8 show an image display device according to an embodiment of the present invention. In FIG. 6, 16 vertical deflection electrodes 32 are inserted into the groove of the fixed frame 31, and then the vertical deflection electrodes 32 are inserted to the reference side. It is pressed and positioned by a spring or the like.

Since the vertical deflection electrode 32 applies voltage to + (plus) and - (minus), terminals 33 and 34 are fabricated by etching or other methods and bent to form each vertical deflection electrode, as shown in FIG. The shape is such that it can be electrically connected to the deflection electrode.

Also, by using two sheets, it is possible to apply voltages to the left and right voltage application terminals, that is, to the voltage application terminals (+ and -). Tip 3 of voltage application terminal 33, 34
6 has a shape divided into a plurality of pieces. The above-mentioned vertical deflection electrode 32 is fixed to the fixed frame 31 of the voltage application terminals 33, 34i with an adhesive frit, as shown in FIG. After applying a base treatment such as Cr, several μm
A film of Ni and Cr of ~ several tens of micrometers is applied by electroless plating or vapor deposition to form the metallized land 3.
There are 6. This metalized land 36 is ITO
Single metallization of 1Cr or Ni may be used. This metallized land 36 is formed on both sides of the vertical deflection electrode 32, one side at a time. After providing this land 36, a conductive film of Au or In2O3 is formed, or the aforementioned metallized runt 036 is passed through the conductive film formed with Au or In2O3. are similar. The tips 36 of the voltage application terminals 33, 34 are brought into contact with the metallized lands 36, and each piece is welded together using a spot or laser beam. As a result, the conductor film 37 and the terminal 34 are electrically connected.

In addition to the effects of the invention, the terminal output for voltage application of the vertical deflection electrode made of an insulating substrate as in the image display device of the present invention is configured such that the vertical deflection electrode is provided with a metalized fixing land. Furthermore, the tip of the voltage application terminal is divided into a plurality of pieces, and the plurality of pieces of the tip are fixed to the above-mentioned fixing land by spot or laser welding to ensure continuity. Even if one piece comes off, it is possible to maintain continuity with other pieces, leading to improved reliability.
Furthermore, since work can be performed at room temperature, equipment such as an electric furnace and space are not required, resulting in significant cost reductions. or,
Since there is no need to use adhesives or the like to establish continuity, there is no resin component inside the vibrator, so there is no outgassing, and the image display is stable over a long period of time. As described above, it has become possible to supply inexpensive and highly reliable image display devices in large quantities, and the practical effects thereof are significant.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an image display element used in an image display device, Fig. 2 is an enlarged plan view of a screen, Fig. 3 is an exploded perspective view of an electrode structure, and Fig. 4 is an exploded perspective view of a conventional vertical deflection electrode. FIG. 5 is a plan view showing a state in which the vertical deflection electrode is connected to the voltage application terminal; FIG. 5 is an enlarged perspective view of the main part thereof; FIG. FIG. 7 is a perspective view of the voltage application terminal of the present invention, and FIG. 8 is an enlarged perspective view of the main part showing the connection between the fixing land of the vertical deflection electrode and the voltage application terminal. 1... Back electrode, 4.32... Vertical deflection electrode, 9.22... Glass container, 21...
...Screen, 2nd, 28, 33.34...
・Voltage application terminal, good s---- land. Figure 3 Figure 4 Figure 6 Figure 8

Claims (2)

[Claims] (1) Provide multiple electrodes between the back electrode and the screen,
The plurality of electrodes are fixed via a coupling spacer, and components such as a back electrode, a plurality of electrodes, and a screen are inserted into a divided glass container, and then sealed together via an adhesive frit. An image display device in which a metalized land is provided on the vertical deflection electrode among the electrodes, and the land and the voltage application terminal are connected by welding. (2) The image display device according to claim 1, wherein the tip portion of the voltage application terminal is divided into a plurality of parts and each part is welded and joined.