JP2584998B2 - Flat panel image display - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flat panel image display device used for a television receiver, a terminal display of a computer, and the like.

2. Description of the Related Art Conventionally, as a flat panel image display device used for a television receiver, a terminal display of a computer, and the like, for example, a deflecting electrode for electrostatically deflecting an electron beam as shown in FIGS. 2 and 3 is used. There is a flat cathode ray tube provided. In the drawing, a vacuum envelope (glass container) surrounding the internal electrode is omitted to clarify the internal electrode. The horizontal and vertical directions of the screen for displaying images, characters, and the like are indicated by (H) and (V).

As can be seen from the perspective external view of FIG. 2, the horizontal cross-sectional view of FIG. 3A, and the vertical cross-sectional view of FIG. Cathode 10
Are arranged independently at equal intervals in the (H) direction, and elongated vertical scanning electrodes 12 are arranged in the (V) direction on an insulating support plate 11 (glass substrate) forming a back electrode plate on the rear surface side. A plurality of lines are independently arranged at intervals. Further, a first signal for applying a video signal to the front side of the linear cathode to perform beam modulation.
Grid electrode 13, second grid electrode 1 for generating electron beam
4, a third grid electrode 15 for shielding the electric field generated by the latter electrode and the beam generation electric field is arranged at a predetermined interval. Further, the fourth grid electrode 16 and the vertical deflection electrode 17
And 18, the first to third horizontal deflection electrodes 19 to 21 are arranged,
Each electrode is connected to every other one of the common buses 22 to 24.
A light emitting layer including a fluorescent screen 27 and a metal back electrode 26 is formed on the inner surface of the face plate portion 28. In this example, red (R), green (G), and blue (B) )
Are formed through black guard bands.

The same voltage as the DC voltage applied to the metal back electrode 26 is applied to the third horizontal electrode 21, and a voltage for electron beam focusing is applied to the first and second horizontal electrodes 19 and 20. It has become.

(Problems to be Solved by the Invention) The flat-panel image display device having the above-described electrode configuration has a disadvantage that the manufacturing cost is extremely high because the number of electrode groups is large.

(Means for Solving the Problems) In order to solve the above-mentioned conventional drawbacks, the present invention is characterized in that an electrode group for taking out and controlling an electron beam is divided for each linear electron source into a unit configuration. Is what you do.

(Object of the Invention) It is an object of the present invention to provide an inexpensive flat panel image display device by using the above-mentioned means to form an electrode group with much less electrode material than a conventional electrode group.

(Operation) In the present invention, an electrode group formed by taking out only a part truly necessary for the electron beam trajectory for each linear electron source (cathode) and simply removing a part of the electrode plate as a unit is configured as a unit, Thereby, the electron beam from the linear electron source performs image display by vertical deflection of the electrode group for taking out and controlling the electron beam and horizontal deflection of the horizontal deflection electrode at the subsequent stage of the electrode group, for example. ,
Conventionally, an electrode group formed by laminating three electrodes can be constituted by a single electrode with only a portion necessary for electron beam control, so that two electrodes are not required, and the number of electrodes is smaller than in the past. It is possible to operate with materials.

(Embodiment) FIG. 1 shows an external view of an embodiment of the present invention.
The same numeral symbols as those in FIG. 2 indicate the same components. This shows a case of a 50-inch (750 mm × 1000 mm) flat-panel television receiver as an example, in which vertical scanning electrodes 12 have a 1.5 mm pitch in the vertical direction (V) on an insulating support plate 11 forming a back electrode plate. They are arranged at intervals. The linear cathodes 10, which are linear electron sources, are arranged at a pitch of 30 mm in the horizontal direction (H).
The arrangement relationship between the electrode 12 and the cathode 10 is as shown in FIGS.

Reference numerals 13 to 18 denote electrode groups for taking out and controlling an electron beam, and reference numerals 19 to 21 denote horizontal deflection electrode groups.

Here, the electrode groups 13 to 18 each have a thickness of 10
0 μm to 200 μm, size 760 mm (V direction) x 14 mm (H
Direction) constitute one unit. The electron beam passage holes A of each electrode are formed at a pitch of 15 mm.

Two electrodes can be obtained from one electrode of a conventionally used electrode group. That is, instead of patterning the rows of the electron beam passage holes A on a single electrode plate conventionally used at intervals of 30 mm corresponding to the linear cathodes 10,
By patterning the rows of the electron beam passage holes A at a pitch of 1/2 of 15 mm, two electrodes can be manufactured with one electrode. Between the rows of electron beam passage holes A arranged at intervals of 15 mm on one electrode plate, holes of about 1 mm are formed at intervals of about 30 mm to facilitate cutting, and the electrodes are divided. Also, after cutting these electrodes, 200μm ~ 400μ
m and a spacer formed of a low melting point glass frit material having a thickness of about m
By firing at about 450 ° C., a unitized electrode group is formed. The column 29 is for withstanding the container as a vacuum envelope against compression from the atmospheric pressure, and the unitized electrode groups 13 to 18 are provided on one side of the column, and the end group side of the column (Z direction). ), Horizontal deflection electrode groups 19 to 21 are arranged. By fixing these units to the back electrode plate with the lift material or the like, it is possible to obtain a flat panel type image display device maintaining the same image quality and performance as the conventional one.

(Effects of the Invention) As described above, according to the present invention, the electron beam extraction and electron beam control electrode group is divided and configured for each linear electron source, so that the electrode material can be significantly reduced as compared with the related art. Because it can be configured, it is cheap.

[Brief description of the drawings]

FIG. 1 is an external view of one embodiment of the present invention, and FIGS.
FIG. 1 shows an example of a conventional flat panel type image display device, FIG. 2 is a perspective external view thereof, and FIGS.
It is a sectional view of the horizontal direction and the vertical direction of the figure. 10 ... Linear cathode, 11 ... Insulating support plate, 12 ... Vertical scanning electrode, 13-18 ... Electrode beam extraction and electron beam control electrode group, 19-21 ... Horizontal deflection electrode group, 29 ... Prop.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kiyoshi Hamada 1006 Kadoma, Kadoma City Matsushita Electric Industrial Co., Ltd.

Claims (1)

(57) [Claims] A plurality of linear electron sources, a means for extracting an electron beam from the electron source, and a back electrode means for controlling the electron beam on a side opposite to the means for extracting the electron beam; In a flat panel type image surface device having a means for emitting light by bombardment of an electron beam, an electrode group for taking out an electron beam and controlling an electron beam is divided into linear electron sources to form a unit configuration. Flat-panel image display device.