KR100447649B1 - A Color CRT - Google Patents

Abstract

The present invention provides a panel with a screen formed on the inner surface; A funnel connected to the panel along a seal surface; In the color cathode ray tube including a neck connected to the funnel, an existing deflection angle 110 degree funnel can be used as it is, and an object thereof is to prevent quality deterioration of the cathode ray tube due to wide angle.

In order to achieve the object of the present invention, by reducing the height OAH from the center of the outer surface of the panel to the seal surface, the color cathode ray tube is realized without widening the funnel with respect to the deflection angle. To provide.

Description

Color Cathode Ray Tube {A Color CRT}

The present invention relates to a color cathode ray tube having a deflection angle of 110 degrees or more, and more particularly, by reducing the height (OAH) from the outer center of the panel to the seal surface without widening the funnel with respect to the deflection angle. The present invention relates to a color cathode ray tube capable of realizing a deterioration of a cathode ray tube as it can be used as it is, and a conventional 110 degree deflection angle funnel.

In general, the color cathode ray tube is connected to the panel 1, which is a front glass having a predetermined inner and outer surface curvature, and the funnel 2, which is a cone-shaped rear glass enclosed to the panel, and a funnel, as shown in FIG. A tube is formed with a neck, and a tube formed of the panel and the funnel has a fluorescent surface 4 for emitting a predetermined light, an electron gun 11 for emitting an electron beam 6 for emitting the fluorescent surface, and an inner surface of the panel. The shadow mask 3 is installed to have a curvature similar to that of the curvature and has a predetermined distance from the inner surface of the panel, and the frame 7 supporting the shadow mask is installed. The combination of the shadow mask and the frame is connected to the stud pins mounted on the panel by a spring (8) coupled to the frame and maintained in the tube, and made of a magnetic material to reduce the movement of the electron beam by an external magnetic field to serve as a shield. The shield 9 is held to the frame 7 by a fixed spring. In addition, a deflection yoke 5 for deflecting the electron beam emitted from the electron gun 11 is mounted on the funnel, and a magnet having 2, 4, 6 poles that modifies its trajectory so that the electron beam 6 strikes a predetermined phosphor precisely. 10) is installed to prevent poor color purity.

Since the above-mentioned tube is evacuated to high vacuum, firecrackers can easily be caused by an external impact. In order to prevent this, the panel 1 is designed to have structural strength capable of withstanding atmospheric pressure, and also a reinforcing band 12 is installed in the skirt of the panel. The name of each component of the panel is shown in FIG. 2. OAH of the panel 1 represents the height from the outer center of the panel to the seal surface, OSH is the height from the mold matching surface to the brake surface, and OMH is the height from the mold matching surface to the yarn surface.

3 shows the names according to the constituent parts of the funnel 2, the funnel comprising a cone portion connected to the neck side and a body connected to the panel side. TOR (Top of Round) of the funnel is the part where the mold and the mold are engaged when forming the funnel, and RL (Reference Line) is the reference dimension in the funnel design. The deflection angle is an angle at which the electron beam deflects from the center of the funnel RL to the effective diagonal of the panel.

In the conventional color cathode ray tube, the funnel is configured to increase the deflection angle by reducing the height of the body of the funnel for wide angle. However, when the funnel is designed like this, new development of deflection yoke is essential, and the deflection sensitivity due to wide angle deterioration is about 26% with respect to the existing 110 degree deflection products, and the inner distortion characteristic due to optical deflection is caused. Improvement is required, and explosion-proof properties are deteriorated. In addition, there are difficult problems that require new development of the exposure machine to form the screen.

Accordingly, the present invention is to solve the conventional problems as described above, by reducing the height (OAH) from the outer surface center of the panel to the actual surface, using a conventional deflection funnel and provides a color cathode ray tube that can realize a wide angle. Its purpose is to.

1 is a cross-sectional view of a conventional planar cathode ray tube.

2 shows names according to respective components of a panel.

Fig. 3 shows the names of the components of the funnel.

Figure 4 is a view comparing the shape of the cathode ray tube according to the prior art and the present invention.

5 is a diagram showing a stress distribution of a conventional cathode ray tube.

Figure 6 is a diagram showing the stress distribution of the cathode ray tube according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

1: panel 2: funnel

3: shadow mask 4: fluorescent surface

5: deflection yoke 6: electron beam

7: frame 8: spring

9: inner shield 10: magnet

11: electron gun 12: reinforcement band

Technical solution of the present invention for achieving the above object is a panel having a screen formed on the inner surface and a funnel having a TOR (Top of Round) and RL (Reference Line) is installed connected along the seal surface on the panel And a neck connected to the funnel and having a neck installed with an electron gun inserted therein, characterized in that it is possible to widen the angle by reducing the height OAH from the outer center of the panel to the actual surface.

4 is a drawing comparing the shape of the cathode ray tube of the prior art and the present invention. As shown in FIG. 4, the present invention can widen the angle by reducing the height OAH from the outer center of the panel to the actual surface without designing a funnel in the direction of increasing the deflection angle by decreasing the height of the body portion. It is done.

The present invention proposes a method that can be wide-angle while using a conventional 110-degree funnel in a color cathode ray tube that is gradually widening.

In the case of applying the cathode ray tube according to the present invention, in the case of the explosion-proof characteristics of the existing 110 degree cathode ray tube or 120 degree cathode ray tube, as shown in FIG. Tensile stress of the cathode ray tube appears to be largely caught in the funnel portion as shown in FIG. Therefore, when the cathode ray tube according to the present invention is externally impacted and the force is transmitted to the cathode ray tube, breakage of the funnel may proceed first, but since the funnel is generally located in a cabinet, the cathode ray tube may have relative stability compared to the existing cathode ray.

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

Table 1 shows the mechanical dimensions of the conventional color cathode ray tube.

Table 1

Model TOR ~ Seal surface RL ~ Seal Effective screen OAH (TOR to Seal side) ÷ OAH (RL to Seal) ÷ OAH 4: 3 25 " 127.7 164.0 590 90 1.4 1.8 29 " 140.8 177.1 676 112 1.3 1.6 16: 9 28 " 157.0 187.0 660 104 1.5 1.8 32 "A 194.7 224.7 760 114 1.7 2.0 32 "B 185.5 224.7 760 114 1.6 2.0

In the mechanical ratio of the conventional color cathode ray tube as shown in Table 1, 1.3≤ (distance from TOR to the surface) ÷ OAH ≤1.7, 1.6≤ (distance from RL to the surface) ÷ OAH of the panel It consists of ratios, such as?

In case of deflection yoke, it is necessary to newly develop when the funnel is changed to wide angle, it is necessary to improve the quality deterioration due to wide angle, and it is difficult to secure inner distortion and other convergence characteristics. In the color cathode ray tube structure according to the present invention, the tool of the 110 degree deflection yoke is used as it is, so even if it is wide angle of 120 degree, there is no deterioration of the deflection sensitivity. Can be used at a wide enough 120 degree angle with a few modifications.

Table 2 shows the OAH change of the panel that changes per 1 degree of deflection angle compared to the conventional color cathode ray tube in applying the color cathode ray tube according to the present invention.

TABLE 2

Model OAH reduction amount (mm / degree) 4: 3 25 " 8 29 " 10 16: 9 28 " 9 32 " 11

Based on the data presented in Table 2, each mechanical dimension designed with varying deflection angles is shown in Table 3 and Table 4 below. Table 3 is the mechanical dimensions of the color cathode ray tube according to the present invention in case of 115 degree deflection, and Table 4 is the mechanical dimensions of the color cathode ray tube according to the present invention in case of 120 degree deflection.

TABLE 3

Model TOR ~ Seal surface RL ~ Seal Effective screen OAH (TOR to Seal side) ÷ OAH (RL to Seal) ÷ OAH 4: 3 25 " 127.7 164.0 590 70 1.8 2.3 29 " 140.8 177.1 676 87 1.6 2.0 16: 9 28 " 157.0 187.0 660 81.5 1.9 2.3 32 "A 194.7 224.7 760 86.5 2.3 2.6 32 "B 185.5 224.7 760 86.5 2.1 2.6

Table 4

Model TOR ~ Seal surface RL ~ Seal Effective screen OAH (TOR to Seal side) ÷ OAH (RL to Seal) ÷ OAH 4: 3 25 " 127.7 164.0 590 50 2.6 3.3 29 " 140.8 177.1 676 62 2.3 2.9 16: 9 28 " 157.0 187.0 660 59 2.7 3.2 32 "A 194.7 224.7 760 59 3.3 3.8 32 "B 185.5 224.7 760 59 3.1 3.8

Therefore, the mechanical ratio of the color cathode ray tube according to the present invention is 1.8 ≤ (distance from TOR to actual surface) ÷ OAH ≤ 3.3, 2.1 ≤ (distance from RL to actual surface) ÷ OAH ≤ 3.8 of panel It is characterized by satisfying the same range.

In order to form a conventional 120-degree wide angle funnel, a new development of an exposure machine is required, and setting of exposure specifications according to wide angle is difficult. In addition, even if the exposure specification itself is set, it is difficult to apply if the exposure load according to the wide-angle deflection cannot be solved. However, if the color cathode ray tube structure according to the present invention is applied, the existing exposure specification can be applied, and since the 110 degree deflection funnel is used, it can contribute to the improvement in manufacturing quality. In addition, the quality of the deflection yoke can be stabilized at an early stage, and the faster the deflection yoke quality is stabilized, the shorter the development period can be.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the claims, the detailed description of the invention, and the scope of the accompanying drawings. It goes without saying that it belongs to the scope of the present invention.

As described above, the cathode ray tube according to the present invention can use a conventional funnel, and therefore does not require a separate facility investment for post-processing, and has advantages in improving quality and shortening the development period. By reducing the weight of the color cathode ray tube, there is an effect that can reduce the weight increase due to the enlargement, which is one of the chronic problems of the cathode ray tube.

Claims (2)

A panel having a screen formed on an inner surface thereof; A funnel connected to the panel along a seal surface and having a top of round (TOR) and a reference line (RL); In the color cathode ray tube comprising a neck which is connected to the funnel and installed with an electron gun inserted therein, Color cathode ray that satisfies the relationship between the height from the outer center of the panel to the actual surface (OAH) and the distance from the top of round (TOR) to the actual surface of the funnel to 1.8≤ (distance from TOR to the actual surface) ÷ OAH≤3.3 tube A panel having a screen formed on an inner surface thereof; A funnel connected to the panel along a seal surface and having a top of round (TOR) and a reference line (RL); In the color cathode ray tube comprising a neck which is connected to the funnel and installed with an electron gun inserted therein, Color cathode ray tube satisfying 2.1≤ (distance from RL to actual surface) ÷ OAH ≤ 3.8 for the relationship between the height from the outer center of the panel to the actual surface (OAH) and the distance from the reference line (RL) to the actual surface