KR19980030940U - Electron gun of the inclined cathode ray tube of the corner of the main lens - Google Patents

Abstract

The present invention provides an electron gun of the inclined cathode ray tube of the corner of the main lens.

The electron gun of the inclined cathode ray tube of the corner portion of the main lens is composed of a plurality of grid electrodes, and in the electron gun that focuses and accelerates the R, G, and B electron beams using the fifth grid and the sixth grid as the main lenses: the electron beam A pair of long sides in the vertical direction, a pair of short sections in the horizontal direction, and a corner portion between the long and short sides of the core to increase the horizontal size of the core and reduce the size of the hollow component. An octagonal hole consisting of two pairs of inclined sides is formed in the G5 and G6 plate electrodes.

Accordingly, the halo component of the electron beam is reduced and the core is increased, thereby preventing deterioration of resolution characteristics in the enlargement and optical deflection angle.

Description

Electron gun of the inclined cathode ray tube of the corner of the main lens

The present invention relates to an electron gun of an inclined cathode ray tube of a corner of a main lens, and more particularly, an inclined cathode ray of a corner of a main lens that can reduce hollow and increase cores of an electron beam in an inline electron gun. It is about the electron gun of the tube.

In general, the color receiving tube is a bulb type in which a fluorescent film is applied to the front screen and an electron gun is received at the neck at the rear, and the R, G, B electron beam emitted from the electron gun at the neck is maintained at a constant distance from the screen. The pixel is formed by colliding with the fluorescent film through the microholes of the shadow mask.

Referring to FIG. 1, a commonly used color water tube electron gun is formed of a cathode 10 for dissipating hot electrons and a plurality of grids G1 to G6 sequentially arranged and fixed integrally by a bead glass 12. do.

The grid includes a triode consisting of a cathode 10, a first grid G1, and a second grid G2, and a third grid G3 for focusing and accelerating hot electrons emitted from the tripole with a predetermined electron beam. ), And a lens unit consisting of a fourth grid (G4), a fifth grid (G5), and a sixth grid (G6), at the forefront of the series of grids, a convergence cup (11) supports the electron gun to the funnel and It is installed so that the voltage of is applied.

When a heater (not shown) in the cathode 10 is supplied with a current from the outside and heated, it emits hot electrons. Hot electrons are controlled in a certain amount by the first grid G1, and hot electrons passing through the first grid G1 are focused and accelerated by the second grid G2 and the third grid G3.

In addition, the fifth grid G5 and the sixth grid G6 serving as pre-focus functions such as the third grid G3, the fourth grid G4, and the main lens are provided. Is accelerated again, and is scanned across the fluorescent surface of the cathode ray tube by the horizontal and vertical deflection magnetic fields of the deflection yoke (not shown) through the convergence cup 20 to form a predetermined screen.

At this time, the deflection yoke mounted outside the neck of the collar tube forms a self-converging magnetic field for the inline type gun and automatically lands the R, G, and B electron beams across the screen, and the pincushion magnetic field is a horizontal deflection field. Self-convergence magnetic field, which consists of a magnetic field of two poles and a four-pole component, generates astigmatism and transversely e-beams due to horizontal divergence and vertical focusing. .

As a result, the deflection yoke's self-convergence field has a good focus characteristic at the center of the screen, but the spot is distorted due to the astigmatism toward the periphery of the screen, and is divided into core and hollow components to deteriorate the resolution characteristic. There is this.

2 is a structural diagram showing an arrangement of a quadrupole electrode. In Fig. 2, it is composed of a plurality of grids G1 to G6, and is applied to an inline electron gun that focuses and accelerates an R, G, B electron beam using the fifth grid G5 and the sixth grid G6 as main lenses. . The sixth grid G6 is formed of grids G61 and G62 divided into two parts, and is composed of a first electrode body 31 and a second electrode body 32 between the grids G61 and G62. Four-pole electrode 30 is provided. The spacing between the first electrode body 31 and the second electrode body 32 is about 1 mm. A predetermined voltage is applied to the first electrode body 31 and the second electrode body 32, respectively, and a focus constant voltage is applied to the first electrode body 31 and a focus constant voltage is applied to the second electrode body 32. do. The focus lamp (dynamic) voltage is parabolic in response to the deflection current of the deflection yoke.

3A to 3C show various large diameter shapes 11a to 13a of the G5 and G6 electrodes of FIG. 2 to solve the above problem.

However, in recent years, as the color receiving tube is enlarged and the optical deflection angle is increased, the deterioration of the focus characteristic, which is further exacerbated by the above-described deformation structure, cannot be compensated for, and thus the resolution is deteriorated. That is, the above-described G5, G6 plate holo structure has a disadvantage in that the horizontal spot size of the electron beam cannot be reduced. That is, there is a problem that the size of the electron beam core in the horizontal direction is reduced and the size of the halo component is increased.

Accordingly, an object of the present invention is to provide an electron gun of the inclined cathode ray tube of the corner portion of the main lens which can reduce the halo component of the electron beam and increase the core in the in-line electron gun for the color receiver.

1 is a structural diagram showing a basic configuration of an electron gun for a color receiver;

2 is a schematic cross-sectional structural diagram showing a configuration of a main lens;

3A to 3C are structural views of various large diameter shapes of the G5 and G6 electrodes of FIG.

4A is a structural diagram of large-diameter shapes of the G5 and G6 electrodes according to the present invention, and FIG. 4B is a plan view showing a beam spot for explaining the result.

* Description of protection for main parts of the drawing

10: cathode 11: convergence cup

12: Bead glass G1: first grid

G2: second grid G3: third grid

G4: fourth grid G5: fifth grid

G6: 6th grid 31: long side

32: short side 33: inclined side

In order to achieve this object, the present invention is composed of a plurality of grid electrodes, and the electron gun focusing and accelerating the R, G, B electron beam with the fifth and sixth grid as the main lens: horizontal of the core of the electron beam A pair of long sides in the vertical direction, a pair of short sections in the horizontal direction, and two pairs of inclinations formed at corners between the long sides and the short sides to increase the direction size and reduce the size of the hollow component. Provided is an electron gun of an inclined cathode ray tube of a corner portion of a main lens, wherein a hole having an octagonal structure composed of sides is formed in the G5 and G6 plate electrodes.

The size reduction of the hollow component can be adjusted according to the length of the inclined side.

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

Figure 4a shows a large diameter structural diagram of the G5 and G6 electrode according to the present invention.

In FIG. 4A, the main electrodes G5 and G6 plate electrodes have a pair of long sides 31 and 31 'long in the vertical direction, a pair of cross sections 32 and 32' short in the horizontal direction, and a long side. It has a hole of an octagonal structure composed of two pairs of inclined sides 33, 33, 33, 33 formed at a corner portion between (31, 31 ') and short sides 32, 32'.

The shape of the beam spot as shown in FIG. 4B is obtained by the hole of the octagonal structure according to the present invention.

That is, in a residual gun composed of a plurality of grids G1 to G6 and focusing and accelerating the R, G, and B electron beams using the fifth grid G5 and the sixth grid G6 as main lenses: By the inclined sides 33, 33, 33, 33 between the and long sides, the horizontal size of the core of the electron beam was increased and the size of the hollow component was reduced as shown by the arrow in FIG. 4B.

In addition, by changing the length of the inclined sides (33, 33, 33, 33), the size reduction of the hollow component is changed to be adjustable.

According to the above-described embodiment, according to the electron gun of the inclined cathode ray tube of the corner of the main lens of the present invention, the inclined sides 33, 33, 33, 33 are formed on the G5 and G6 plate electrodes, thereby the halo of the electron beam. Reduction of the component and core increases the effect of preventing deterioration of resolution characteristics even in large size and light deflection angle.

Although the present invention has been set through the embodiments, the present invention is not limited thereto, and various modifications and applications are possible to those skilled in the art from the above-described embodiment and the appended claims of utility model registration.

Claims (2)

In an electron gun composed of a plurality of grids (G1 to G6) and focusing and accelerating the R, G, and B electron beams using the fifth grid (G5) and the sixth grid (G6) as main lenses: A pair of long sides in the vertical direction, a pair of short sections in the horizontal direction, and a corner between the long side and the short side to increase the horizontal size of the core of the electron beam and reduce the size of the hollow component. An electron gun of an inclined cathode ray tube of a corner portion of a main lens, wherein a hole having an octagonal structure formed of two pairs of inclined sides is formed in the G5 and G6 plate electrodes. 2. The electron gun of the inclined cathode ray tube of the corner portion of the main lens according to claim 1, wherein the size of the hollow component is adjustable according to the length of the inclined side.