Flat cathode ray tube and method of manufacturing same
AssigneeSamsung Display Devices Co., Ltd.
InventorSang-hoon Lee
Life of this patent
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Abstract
A flat cathode ray tube includes a front panel having an inner phosphor screen with a plurality of phosphor pixels and an inner edge side, a solid glass frame having a front side and a rear side, and a tensioned mask having a plurality of beam-guide holes corresponding to the phosphor pixels on the phosphor screen and an edge portion. The front panel is formed with a substantially flat shape. The front side of the solid glass frame is sealed to the edge side of the front panel. The edge portion of the tensioned mask is immersed in the solid glass frame. A funnel mounting a deflection yoke therearound and having a neck mounting an electron gun therewithin is sealed to the rear side of the glass frame. The phosphor screen of the front panel is formed by using a printing method.
Claims8
A method of manufacturing a flat cathode ray tube having a front panel with a substantially flat shape, the method comprising the steps of:
- printing a phosphor screen on an interior surface of the front panel with a printer;
- fixing a tensioned mask having a plurality of beam-guide holes to a glass frame;
- sealing the glass frame to the front panel;
- and
- sealing a funnel to the glass frame;
- wherein the tensioned mask fixing step further comprises the steps of,
- mounting an edged portion of the mask onto a lower glass frame die;
- heating the mask to thermally expand the mask and give a tensional force to the mask,
- combining an upper glass frame die with the lower glass frame die to form a die assembly having an internal vacant space,
- injecting a glass solution into the vacant space of the die assembly;
- and
- solidifying the glass solution injected into the vacant space of the die assembly to form a solid glass frame with the tensioned mask fixed thereto, and removing the die assembly from the glass frame.
Dependencies are inferred from the claim text.