KR0165084B1 - Panel glass for color cathode ray tube - Google Patents

Abstract

The present invention relates to a panel glass for a color CRT, and a horizontal color CRT is applied at both ends of the panel glass (1) because excessive stress is applied from the center (3) of the panel glass (1) toward the upper, lower, left, and right corners (2). There is a problem in that the strength of the skirt portion 4 bent downward is weakened, and the bending angle of the skirt portion 4 of the panel glass 1 is 5 degrees to 7 degrees for the diagonal axis Dθ and 3 degrees for the major axis angle Lθ. To 6 degrees, the short axis angle Sθ is characterized in that it is limited to 6 to 9 degrees. The present invention has the effect of simply improving the strength and explosion-proof characteristics of the panel simply by limiting the bending angle of the skirt portion 4.

Description

Panel glass for color CRT

1 is a plan view of the panel glass for color CRT,

2 is a cross-sectional view taken along the short axis, long axis and diagonal axis of the panel glass of FIG. 1,

FIG. 3 is an enlarged detail view of part A of FIG. 2.

* Explanation of symbols for main parts of the drawings

1: panel glass 2: corner

3: center 4: skirt part

5: outside 6: inside

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel glass for color CRT, and more particularly, to a panel glass for color CRT which improves the strength and explosion-proof characteristics of the panel by constantly limiting the bending angle of the skirt portion of the panel glass.

In general, in the color CRT, the so-called horizontal color CRT is excessively stressed from the center 3 of the panel glass 1 toward the top, bottom, left and right corners 2, as shown in FIG. There is a problem that the strength of the skirt portion 4 (FIGS. 2 and 3) bent downward at both ends is weak, and what has been suggested as a solution to this has so far been little.

In FIG. 1, reference numeral a denotes a diagonal axis of panel glass, b denotes a long axis, and c denotes a short axis.

The present invention has been devised in view of the above, an object of the present invention is to provide a panel glass for color-brown tube which limits the bending angle of the skirt portion to improve the strength and explosion-proof characteristics of the panel.

In order to achieve the above object, the panel glass for color CRT according to the present invention has a bending angle of the skirt portion of the panel glass 5 to 7 degrees for the diagonal axis, 3 to 6 degrees for the major axis, and 6 to 9 degrees for the short axis. It is characterized by a limitation.

The bending angles of the diagonal, long and short axes of the skirt portion are limited to the panel glass for the color CRT of the present invention because the stress is concentrated toward the skirt portion when the angle is smaller than the limited angle, so that the strength decreases. Because it is too heavy, it is not suitable.

Referring to the drawings, the panel glass for color CRT of the present invention will be described.

2 is a cross-sectional view of the panel glass for color CRT panel according to the present invention, the cross section of the diagonal axis (a), long axis (b) and short axis (c) of FIG. The leftmost part of the image represents the cross section of the diagonal axis a, the right side of the diagonal axis a represents the cross section of the minor axis c, and the rightmost part represents the cross section of the long axis b.

In addition, FIG. 3 is an enlarged view of the section A of FIG. 2, that is, the diagonal axis a, according to the complexity of FIG.

As shown in these figures 2 and 3, the skirt portion 4 refers to a portion bent downward at both ends of the outer surface 5 of the panel glass 1. The inner surface 6 of the skirt portion 4 is inclined at an angle to the inside of the panel glass 1 rather than an actual vertical line formed vertically at the end of the inner surface 6 of the skirt portion 4. When the angle of the inner surface of the skirt part 4 in the double diagonal axis a, the major axis b, and the minor axis c is referred to as the diagonal axis angle Dθ, the major axis angle Lθ and the minor axis angle Sθ, respectively, The diagonal axis angle Dθ is preferably 5 degrees to 7 degrees.

Here, the diagonal axis angle Dθ may be maintained the same throughout the panel glass 1, and the major axis angle Lθ and the minor axis angle Sθ may be formed at the same angle.

However, the stresses of the long axis b and the short axis c actually received by the edge 2 of the panel glass 1 become slightly smaller or slightly larger than the diagonal axis a.

In order to optimally cope with this, the present invention has different angles of the diagonal axis Dθ, the long axis angle Lθ, and the short axis angle Sθ, and the long axis angle Lθ is 3 degrees to 6 degrees and the short axis angle ( Sθ) is preferably 6 to 9 degrees.

Thus, the panel glass for color CRT tubes of this invention has an effect which can improve the intensity | strength and explosion-proof characteristic of a panel simply by restricting the bending angle of a skirt part.

Claims (3)

In the panel glass for color CRT, an actual vertical line formed vertically at the end of the inner surface 6 of the skirt portion 4 of the panel glass 1 and the inner surface of the skirt portion 4 are inclined inside the panel glass 1. Diagonal axis angle (Dθ), long axis angle (Lθ) and short axis angle (Sθ) forming a 5 to 7 degrees panel panel glass for color. The panel glass for color picture tube according to claim 1, wherein the major axis angle (Lθ) of the skirt portion (4) is 3 to 6 degrees. The panel glass for color picture tube according to claim 1 or 2, wherein the short axis angle (Sθ) of the skirt portion (4) is from 6 degrees to 9 degrees.