KR0121616Y1 - Panel for color cathode ray tube - Google Patents

Abstract

A panel for a color brown light, comprising: a quadrangular panel having curvature along a short axis, a long axis, and a diagonal axis, and a fluorescent screen on the inner surface of the panel, and a curvature along a short axis along a short axis on the center of the panel. In the panel for color brown light, which is designed to be at least larger, the curvature of the short axis on the center of the panel is made smaller than the curvature of the long axis to make it appear flat in appearance and to improve the quality of the product by improving the strength and image quality of the color CRT. It can be improved.

Description

Color Brown Tube

1 is a cross-sectional view showing a color CRT according to the prior art,

FIG. 2 is a front view of the panel showing line AA ′ of FIG. 1,

3, 4, and 5 are cross-sectional views of panels showing lines B-B ', C-C', and D-D 'of FIG. 2, respectively.

6 is a composite view showing the long axis, short axis and diagonal axis surface contour of the panel for color CRT of FIG.

7 is a quadrant diagram showing the curvature radius and function of the panel,

8 is a front view showing a face plate panel according to the present invention,

8, 10 and 11 are cross-sectional views of panels showing lines E-E ', F-F', and G-G 'of FIG. 8, respectively.

FIG. 12 is a complex view of the long, short and diagonal axis surface contours of the panel for color CRT

13 is a quadrant diagram showing the curvature radius and function of the panel.

* Explanation of symbols for the main parts of the drawings

10: glass jacket 12: color CRT

14: Funnel 16, 56: Panel

18: Neck 20: Deflection York

22: electron gun 24, 58: screen

26: electron beam 28: screen mask

The present invention relates to a panel for a color CRT, and more particularly, to structurally modify and improve a rectangular color CRT panel having an outer surface with curvature so as to form a short axis and a long axis, so that the color CRT panel can be seen more flat. Therefore, the present invention relates to a color CRT panel that can improve product quality by improving strength and vivid image quality.

Recently, a method for improving the color brown light panel forming a spherical shape has been proposed to increase the coefficient of curvature of the panel by a factor of 1.5 to 2, and a more satisfactory screen is obtained by reducing the curvature of the panel. (Sceen) and the trend is being developed in you guys involved to bring seemingly smooth and comfortable effects.

In addition, the concept of a new panel that exhibits a flat shape is described in United States Patent Application Nos. 469722, 469774 and 469775, filed February 25, 1983, where the contours are diagonal, long and short axis of the panel. It is important to mix the different curvatures extending from, but to have contours.

The panel for color brown light according to the prior art is configured as shown in FIG. 1, which shows a four-sided cathode ray tube of a colored CRT tube 12 having a glass shell 10, and a four-corner funnel 14 and a panel 16. And a neck 18 connected by.

On the other hand, the outer circumferential surface of one side of the color CRT 12 is interposed a deflection yoke 20, which is bent at a certain angle in a circular shape, and the inside of the neck 18 described above is briefly indicated by a dotted line, but inline type electron gun in the center 22 is mounted to generate an Electron Beam 26 which is directed to the fluorescent screen 24 along the same plane.

The shadow mask 28 is mounted inside the panel 16 in a state where the shadow mask 28 is spaced apart from the screen 24 at a predetermined interval. In addition, the aforementioned deflection yoke 20 carries out three electron beams 26 so as to scan the electron beams 26 in the horizontal direction of the major axis XX and the vertical direction of the minor axis YY, respectively, in the fluorescent screen 24. Subordinate to vertical and horizontal magnetic lines of force.

2 shows a panel, wherein the periphery of the panel 16 is formed as a quadrangle bent at an angle, and the boundary point of the screen 24 is indicated by a dotted line, and the boundary of the screen 24 is perpendicular to the straight line. Squares.

As the cross-sectional views taken along the short axis (YY), long axis (XX) and diagonal axis of the panel are shown in FIGS. 3, 4 and 5 respectively, the outer surface of the panel 16 is along the long axis and the short axis. It is curved at an angle, where the curvature 1 / Ro along the short axis is designed to be at least 10% larger than the curvature 1 / H (x) along the long axis.

The heights SH1, SH2, and SH3 indicated by arrows in the respective figures described above are the heights from the edges of the screen 24 to the outermost surface of the panel 16 at the ends of the short axis, major axis and diagonal axis, respectively, and three arrows. The height represented by has the following relationship: SH1SH2SH3

FIG. 6 is a diagram showing the outer panel surface contours of the long axis, the short axis and the diagonal axis overlapping each other, with the end of each contour ending at the edge of the screen. That is, the long axis contour ends in the first plane P1 perpendicular to the longitudinal axis Z-Z of the color CRT, and the short axis contour ends in the second plane P2 parallel to and intersect with the first plane P1. The diagonal contour is also parallel to the first plane and ends at the third plane P3 which is spaced apart. The three planes are separated from the central portion of the plate in the order of the second plane, the first plane, and the third plane.

In addition, when the interval of each of the P2, P1, P3 perpendicular to the Z-axis is 69 centimeters (27 inches), the panel is made of 4mm.

7 is a diagram showing the curvature radius of the panel, the curvature radius along the short axis is a circle of curvature radius Ro, parallel to the short axis and the surface curvature of the side of the panel at the corner of the screen is also a circle. In addition, the surface curvature at the portion parallel to the minor axis between the sides of the screen 24 is circular, the radius of which is Ri.

In addition, the radius of curvature is a function of the distance along the major axis from the minor axis and has the following relationship: RoRiRe

The surface curvatures at the top and bottom of the panel 16 are circular with a radius of R1.

In addition, the surface curvature along the major axis becomes a more complex function H (x) with respect to the distance from the minor axis. Basically, the curvature of the long axis becomes circular near the center of the panel whose radius is R, but the curvature increases near the side of the panel. This increase leads to perturbations in the fundamental radius of curvature R.

The table below shows the size of a color CRT with a 69-inch diagonal screen screen configured in this way.

However, the curvature of the color brown light panel according to the prior art is designed to have a curvature along the short axis on the center of the panel at least 10% or more larger than the curvature along the long axis. This large and vertical deflection yoke of the color CRT has a fatal problem in that the image quality is not only improved but also the performance of the product is deteriorated because the electron beam is deflected at a predetermined angle in the direction of force according to Fleming's law of loss.

The present invention is to solve the above problems, by structurally modifying and improving the color CRT including a rectangular color brown light panel of the outer surface having a curvature constituting a short axis and a long axis, thereby flattening the pattern of the color CRT The purpose of the present invention is to provide a panel for color brown light, which can improve the quality of the product by improving the strength and image quality of the color CRT accordingly.

In order to achieve the above object, the present invention includes a quadrangular panel that forms curvature along each of a short axis, a long axis, and a diagonal axis, and a fluorescent screen on the inner surface of the panel. In the panel for color brown light, which is designed at least larger than the curvature along the long axis, the curvature of the short axis on the center of the panel is provided to appear flat in appearance at a minimum smaller than the curvature of the long axis.

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

As shown in FIG. 8, the periphery of the panel 56 is formed as a rectangle bent at an angle, and the boundary point of the screen 58 is indicated by a dotted line, and the boundary of the screen 58 is perpendicular to the straight line. It is rectangular.

As the cross-sectional views taken along the short axis (YY), long axis (XX) and the diagonal axis of the panel are shown in FIGS. 9, 10 and 11 respectively, the outer surface of the panel 56 has a long axis and a short axis. It is bent at a constant angle, and the curvature along the short axis is designed to be at least 5% to 10% smaller than the curvature along the major axis.

The heights SS, LS, DS shown by arrows in the respective figures described above are the heights from the edges of the screen 58 to the outermost surface of the panel 56 at the ends of the short axis, major axis and diagonal axis, respectively, and three arrows. The heights indicated by have the following relationship: SSLSDS

FIG. 12 is a diagram showing the outer panel surface contours of the long axis, the short axis and the diagonal axis overlapping each other, with the end of each contour ending at the edge of the screen. That is, the long axis contour ends at the first plane LP perpendicular to the longitudinal axis Z-Z of the color CRT, and the short axis contour ends at the second plane SP parallel to and spaced apart from the first plane LP. Diagonal contour lines are also parallel to the first plane and end at spaced third planes DP. The three planes are separated from the central portion of the plate by the second plane, the first plane, and the third plane.

FIG. 13 shows the radius of curvature of the panel, the radius of curvature along the minor axis being circular with a radius of curvature Rs, parallel to the minor axis, and the surface curvature at the side of the panel at the corners of the screen also being RLe.

Further, the surface curvature at the portion parallel to the minor axis between the minor axis screen sides is circular, the radius of which is Rm.

Thus, the radius of curvature is a function of the distance along the major axis from the minor axis and has the following relationship: RsRLeRm And the surface curvature at the top and bottom of panel 56 is circular with a radius of Rse.

The surface curvature along the major axis also results in a more complex function R1 for the distance from the minor axis. Basically, the curvature of the outer surface along the short axis is rounded from the center of the panel 56 and is formed such that its curvature increases from near the edge of the panel to the plane LP.

The table below shows the size of a color CRT with a 24-inch diagonal screen screen configured in this way.

The operation and effects of the present invention configured as described above are as follows.

As shown in FIGS. 8 through 13, the curvature of the short axis on the center of the color brown light panel having curvature along the short axis and the long axis is at least 5% to 10% smaller than the curvature of the long axis. It is designed to look flatter in appearance and increase the strength of the panel.

Therefore, by structurally modifying and improving a cathode ray tube including a rectangular color brown light panel having an outer surface with curvatures forming a short axis and a long axis, the panel of the color brown light tube can be seen to be more flat, and thus It is effective to improve product quality by improving strength and quality.

Claims (2)

A four-sided panel with curvature along the short axis, long axis and diagonal axis, and a fluorescent screen on the inner surface of the panel, the curvature along the short axis being at least greater than the curvature along the long axis over the center of the panel. In the light panel, the curvature forming a short axis on the center of the panel is smaller than the curvature forming the long axis to be at least flat appearance of the color brown light panel provided. The panel of claim 1, wherein the curvature of the short axis is designed to be larger than 5% and smaller than 10% of the curvature of the major axis.