Shadow mask with specifically shaped apertures
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United States of America Patent
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-
Nov 6, 2001
Grant Date -
N/A
app pub date -
Jul 16, 1999
filing date -
Jul 16, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a shadow mask type color cathode-ray tube having slot apertures that are straight in the perpendicular direction, the projections of electron beams transmitted by the slot apertures onto the fluorescent screen tend to curve in a banana-like shape with increasing proximity to the right and left sides of the screen, thereby bringing about a drop in the color interference margin and loss margin. The projection of electron beams that are transmitted by the slot apertures and strike the fluorescent screen can be made straight by boring slot apertures in advance that are curved in the direction opposite the curvature of the electron beam projection.
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