Electric heating – Metal heating – By arc
Patent
1993-01-28
1998-03-03
Walberg, Teresa J.
Electric heating
Metal heating
By arc
216 4, 216 94, 356432, 362 30, 40541, 264 22, B23K 2600, G09F 1308
Patent
active
057238430
ABSTRACT:
The present invention concerns a novel method for balancing an illuminated display panel to achieve a predetermined level of illumination uniformity from indicia formed on the panel. One embodiment of the present invention includes the steps of first fabricating an unbalanced display panel having light translucent and absorptive layers deposited on a panel substrate with indicia formed in the light absorptive layers. The unbalanced panel is illuminated and the amount of light from the indicia formed in the panel are measured to identify illumination deficient indicia. A carbon dioxide laser beam is then focused onto the illumination deficient indicia so as to etch portions of the light translucent layer underlying these indicia and increase the amount of illumination from these indicia. In an alternative embodiment, an illuminated display panel is partially fabricated by applying a light translucent layer to a display panel substrate. The partially fabricated display panel is then illuminated and the level of illumination from the translucent layer are measured to identify illumination deficient regions. A carbon dioxide laser beam then etches these illumination deficient regions so as to increase the level of illumination from these regions. Fabrication of the panel is then be completed.
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Illuminated Display Division of Bell Industries, Inc.
Mills Gregory L.
Walberg Teresa J.
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