KR19980021450A - Cathode deflector of cathode ray tube - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film type deflector of a cathode ray tube for widening a deflection angle of a magnetic field in a deflection portion of a plurality of laminated films, and to widening a deflection angle of a magnetic field formed in a deflection portion of a plurality of laminated films. A plurality of films 330 are formed in a cone shape, characterized in that it comprises a fixture 335 is formed in a predetermined shape so that the molded film 330 is mounted.

Accordingly, the multi-layered film is planarized to increase the deflection angle of the magnetic field formed in a predetermined pattern at the deflection portion so that the scanned electron beam forms an image uniformly over the entire surface of the screen, thereby improving the quality of the cathode ray tube. It works.

Description

Cathode deflector of cathode ray tube

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film for producing a deflection member of a cathode ray tube, and a deflection member formed by laminating and molding the same, and more particularly, to a film type deflection device of a cathode ray tube for widening a deflection angle of a magnetic field in a deflection portion of a plurality of laminated films.

In FIG. 1, a panel 12 having a fluorescent screen 20 formed on the rear surface of a face plate 18 and an electron gun 11 for forming electron beams 19a and 19b and emitting them toward the screen 20 are provided. The color cathode ray tube 10 includes a neck 14, a funnel 13 connecting the neck 14 and the panel 12, and a deflection yoke assembly 17 mounted to the neck-funnel connection portion. Shown.

An inner conductive layer (not shown) in contact with the anode terminal 15 is formed on the inner surface of the funnel 13. The shadow mask 16 having a plurality of apertures or slits 16a formed in a predetermined arrangement is detachably mounted to the panel 12 at a predetermined distance from the screen 20.

The deflection yoke assembly (deflection device) 17 usually has a horizontal deflection member and a vertical deflection member. The horizontal deflection member forms a horizontal deflection magnetic field to horizontally deflect the motion paths of the electron beams 19a and 19b when a horizontal deflection current is applied, while the vertical deflection member is configured to supply the electron beam when a vertical deflection current is applied. A vertical deflection magnetic field is formed to vertically deflect the motions of 19a and 19b. By changing the deflection magnetic field by a change in the current applied to the deflector, electron beams 19a and 19b are scanned over the entire surface of the screen 22 to form a two-dimensional image in the cathode ray tube panel 12.

Conventional horizontal and vertical deflection members are coiled coils, which include a toroidal type winding method and a saddle type winding method. As a horizontal deflection coil, a saddle type coil is mainly used. It is wound with a toroidal type or saddle type coil.

However, the coil-type deflection member attempts to develop a film-type deflection member that can be more easily manufactured due to the limitation of the pattern of the magnetic field along the winding, the nonuniformity of the product characteristics according to the conditions of the winding operation or the manufacturing process. However, there are many problems in manufacturing the deflection member of the cathode ray tube using the film, which is not practically commercialized or commercialized. In order to realize this, various types of film structures filed by the applicant will be briefly described with reference to FIGS. 2 (a) to 5 as follows.

In FIG. 2 (a), the film F ₁ (F _n ) having at least one conductive line E having a predetermined pattern structure embedded therein is flattened and mounted at a predetermined position on the inner surface of the core 136. A deflection portion TF forming a three-dimensional curved shape for forming a magnetic field pattern, and a pair of longitudinally extending ends before and after the deflection portion (up and down in the drawing) and bent outward at both ends of the core 136. Connecting terminals CE ₁ ,... CE ₄₁ (CE ₁ ,... CE ₄₁ ) to extend electrically in the lengthwise direction at the front and rear ends of the bending portions BF, BF ′ and their respective films or conductors in a predetermined wiring structure. ´ ₀ ,… CE ´ ₄₀ , plug-in reinforcing members RP, RP 1, RP ₂ and connectors C, C ₁ , C ₂ provided with connections CF, CF ′. The patterns of the conductive lines E ₁ ,... E _{40 in} the deflection portion TF are formed in a structure that forms a predetermined magnetic field when forming a three-dimensional curved shape.

In the bending portions BF and BF 'of the film F ₁ (Fn), a plurality of slits S are formed in the longitudinal direction, and a tear preventing hole SR is formed at both ends of the slits S. and, that the front end of each wire (E) drawing the upper end is provided with a connector (C) the connector connecting terminal being connected to the _{(CE 1, ... CE 41)} (CE' 0, ... CE' 40).

A connector connection terminal (CE _1, ... CE ₄₁₎ the outer both sides are embedded in the form, such as a wire is embedded jump conductors (JE _1, JE2) of the two connectors of the outermost connection terminals (CE ₁₎ and (CE ₄₁₎ It is formed to extend and the end of each of the jump conductor (JE ₁ , JE ₂ ) is exposed one side of the conductor to the outside to form an external jump terminal (OE ₁ , OE ₂ ). In addition, 40 conductive wires are formed in the deflection portion, and in the connector connecting terminals CE´ ₀ and CE ₄₁ for easy insertion into the connector C, the conductive wires are partially formed at one connection portion, and the bending portion, deflection portion, and the other side are formed. Although not formed in the connection part, the connector connection terminals CE´ ₀ and CE ₄₁ are removed depending on the wiring structure. When a plurality of conductors are embedded in one film F ₁ ... F _n on both sides, the conductors arranged up and down by the upper and lower conductive line connecting holes CH may be connected.

The film of another example shown in FIG. 3 (b) has a connection portion CF ₁ , CF ₂ , which is formed by splitting and extending the slits CS formed in the center to the connection part side as compared with the example shown in FIG. 2 (a). CF' _1, CF' ₂₎ the formation, and that the divided connection _{(CF 1, CF 2, CF'} 1, CF' 2) is different from the point configured to be further spaced at a distance. By dividing in this way, it is possible to position the connection end portions in free positions with each other and to further widen the width thereof.

Further, Fig structure 2 (c) in to the time achieved a three-dimensional curved surface shape of the pattern of each conductive wire _{(E 1, ... E 40)} (E 1, ... E 40) in the deflection portion (TF) to form a predetermined magnetic field And a first lead portion (E ₁ ,... E ₄₀ ) and a second lead portion (E ₁ ,... E ₄₀ ) formed symmetrically with respect to the center line, and the bending portions (BF, BF ′) 1 the conductive wire portion and a film portion and the second wire connecting portion divided _{(CF 1, CF 2, CF'} 1, CF' 2) in the division of the first wire portion and the second lead portion connected to the terminal (CE _1, CE ... ₄₀ (CE ₄₁ )) ((CE´ ₀ ) CE´ ₁ … CE´ ₄₀ ) can be further separated and extended horizontally so that the saddle type can be connected from the outside of the core 136.

The above-mentioned various planarized films include pattern design of each conductor, fabrication of artwork (mask film), copper foil lamination on the base, photoresist coating, and negative film in the same manner as the conventional method of manufacturing a flexible printed circuit film (FPC). It is manufactured by the manufacturing method including a series of processes of image development and copper foil etching.

The flattened film of the above-described structure is formed into a predetermined shape for use as a deflection member of the cathode ray tube, which forms the same curved surface as the funnel of the cathode ray tube without considering the deflection angle of the deflection portion. It is molded in the same shape as the bobbin to be formed and mounted on the bobbin while forming a three-dimensional curved shape. Therefore, the deflection angle becomes narrow, resulting in a problem that the scanned electron beam cannot form an image uniformly over the entire screen. It became.

The present invention is to solve the above-mentioned problems, the cathode ray tube which widens the deflection angle of the magnetic field formed in a predetermined pattern in the deflection portion of the multi-layered film to uniformly scan the electron beam throughout the screen to form an image Its purpose is to provide a film-type deflecting device.

1 is a partial cross-sectional plan view schematically showing the configuration of a color cathode ray tube;

2A, 2B, and 2C are plan views illustrating examples of various types of planarized films constituting the film type deflection member;

3 is a perspective view showing only the deflection portion without the connection portion of the film type deflection member;

4 is a cross-sectional view taken along the line 2-2 of FIG. 1;

5 is a cross-sectional view taken along the line 5-5 of FIG. 4;

6 is a process chart for explaining the manufacturing process of the film-type deflection member,

7 is a schematic front view showing a deflection device according to the present invention;

Figure 8 (a) is a detailed cross-sectional view of Figure 7, b is a schematic front view of the film-like deflection member according to the present invention;

Explanation of symbols about main parts of the drawings

10 cathode ray tube 11 electron gun 12 panel

13 funnel 14 neck 15 positive terminal

16 shadow mask 18 face plate 19a, 19b electron beam

20: screen

117: deflection yoke assembly (deflection device) 135: bobbin 136: core

F1,… Fn: Film (FPC substrate) C, C1, C2: Connector

E: Conductor E01, E02: External jump terminal JE1, JE2: Jumper

TF: deflection part (forming part)

CF, CF´, CF1, CF2, CF´1, CF´2: Connection

BF, BF´: Bending part RP, RP1, RP2: Plug type reinforcement member

CH: up and down wire connecting hole 317: deflection device (invention)

330: film-type deflection member (the present invention) 335: fixture

335a: Inside fixture 335b: Outside fixture 335c: Groove

In order to achieve this object, the present invention extends both ends of the deflection portion and the deflection portion in which a plurality of conductive wires are formed so as to form a predetermined magnetic field pattern when a current flows in the conductive wire, and each conductive wire is exposed at the end. In the film-type deflection apparatus of a cathode ray tube formed by stacking a plurality of films having a plurality of connection terminals, the film is formed into a cone shape so as to widen the deflection angle of the magnetic field formed in the deflection portion of the stacked film. It provides a film-type deflector of the cathode ray tube, characterized in that it comprises a fixture formed in a predetermined shape so that the molded film is mounted.

In addition, the inner surface of the fixture of the present invention is formed in a curved shape of the same shape as the funnel to be mounted to the funnel of the cathode ray tube, the outer surface is formed in a cone shape so that a plurality of films are mounted.

At this time, it is preferable that a plurality of predetermined grooves are partially formed on the outer surface of the fixture in the axial direction in the cathode ray tube in order to reduce the weight of the fixture.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 7 shows a schematic front view of a deflection device 317 according to the present invention, in which the deflection device 317 firstly has an inner surface 335a of the fixture 335 the same as the funnel 13 of the cathode ray tube. Is formed in a curved shape, and the outer surface 335b of the fixture 335 is formed in a cone shape planarized to mount a plurality of films 330. Then, as shown in FIG. 8A, a plurality of films 330 are molded into the same cone shape as the outer surface 335b of the fixture 335 and mounted on the outer surface 335b. At this time, the outer surface 335b of the fixture 335 is the axial direction of the cathode ray tube 10 in a portion where a plurality of films 330 are mounted in order to minimize the weight of the fixture 335 as shown in FIG. As a result, a plurality of predetermined grooves 335c may be partially formed.

As described above, the plurality of films 330 are planarized and formed into a cone shape so as to be planar on the outer surface 335b of the fixture 335 such as the conventional bobbin 135 formed into a cone shape having the same shape as the film 330. After assembling or attaching the cores and mounting the cores (not shown), assembling the deflection apparatus 317 is completed by connecting the respective conducting wires E of each film 330 with a predetermined connection structure, and the funnel 13 of the cathode ray tube is completed. The inner surface 335a of the fixture 335 which forms a curved shape having the same shape as () is coupled to the funnel 13 of the cathode ray tube, so that the deflector 317 is mounted at a predetermined position of the cathode ray tube.

As described above, the film-type deflection member is mounted on a predetermined position of the cathode ray tube instead of a three-dimensional curved surface by mounting and deflecting the film-type deflection apparatus of the cathode ray tube of the present invention, thereby effectively reducing the deflection angle of the predetermined magnetic field. By widening, the electron beam can be uniformly scanned over the entire screen to form an image, resulting in an excellent effect of improving the quality of the cathode ray tube.

Claims (3)

When the current flows in the conductive wires, a deflection portion in which a plurality of conductors are formed so as to form a predetermined magnetic field pattern, and extends at both ends at the deflection portion, and each film is exposed at the end and has a plurality of films having a plurality of connection terminals. In the film type deflector of a cathode ray tube formed by laminating: In order to widen the deflection angle of the magnetic field formed in the deflection portion TF of the multi-layered film 330, the plurality of films 330 are formed in a cone shape, and the predetermined film 330 is mounted to be mounted. Film-type deflection apparatus of the cathode ray tube, characterized in that it comprises a fixture (35) formed in the form. The inner surface 335a of the fixture 335 is formed in a curved shape having the same shape as that of the funnel 13 so as to be mounted on the funnel 13 of the cathode ray tube, and the outer surface 335b is formed in the plurality. Film-type deflection apparatus of the cathode ray tube, characterized in that formed in the cone so that the film 330 is mounted. The outer surface 335b of the fixture 335 has a plurality of predetermined grooves 335c in the axial direction of the cathode ray tube in the mounting portion of the film 330 in order to reduce the weight of the fixture 335. Film-type deflector of the cathode ray tube, characterized in that formed in part.