Samsung Corning Co., Ltd.

Jae Seon Kim

Hyo Keun Lee

Gue Chul Jang

Kyoung Mun Choo

Soon Woong Lee

A flat panel for a cathode ray tube includes a faceplate portion, a skirt portion and a blend round portion joining the faceplate portion with the skirt portion. A point where an external contour of the faceplate portion meets an external blend round contour of the blend round portion is defined as a first point and a point where an external contour of the skirt portion meets the external blend round contour is defined as a second point. The external blend round contour is formed between an imaginary arc whose end points coincide with the first and second points and a line segment whose end points coincide with the first and second points, or is the line segment. The imaginary arc is smoothly connected to the external contours of the faceplate portion and the skirt portion at the first and the second point.

Flat panel with blend round portion structure for use in a cathode ray tube

A glass panel for use in a cathode ray tube includes a face portion for displaying images; a skirt portion extending from a periphery of the face portion backwards; and a blend radius portion for connecting the face portion and the skirt portion. The face portion is provided with an effective screen and a wedge portion positioned near a periphery portion of the effective screen. Compressive stress layers are formed on any regions of an inside and an outside surface of the face portion and the skirt portion, and a maximum compressive stress value &#x3c3;Fmax of the face portion and a minimum compressive stress value &#x3c3;Smin of the skirt portion satisfy a relationship of &#x3c3;Smin/&#x3c3;Fmax&#x3c;0.5.

Glass panel and a cathode ray tube including the same

A panel for use in a cathode ray tube includes a face portion for displaying picture images, a skirt portion extending backward from a perimeter of the face portion and a blend radius portion joining the skirt portion to the face portion. The panel for use in a cathode ray tube has average outside curvature radius R (mm) of the face portion which satisfies the following relationship: R&#x2267;10,000; wedge rate Td/Tc of the face portion which satisfies the following relationship: 2.0&#x2266;Td/Tc&#x2266;2.6; maximum compressive surface stress &#x3c3;C(MPa) of the face portion and the skirt portion which satisfies the following relationship: &#x2212;30&#x2266;&#x3c3;C&#x2266;&#x2212;15; and tensile bending stress &#x3c3;bt (MPa) at inner surface of the blend radius portion which satisfies the following relationship: &#x3c3;bt&#x2266;10.

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Kyungki-do, South Korea

Jae Seon Kim