Structure of light-emitting device with raised black matrix for use in optical devices such as flat-panel cathode-ray tubes
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United States of America Patent
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Dec 19, 1995
Issued Date -
N/A
app pub date -
Jan 31, 1994
filing date -
Apr 10, 1992
priority date (Note) -
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Abstract
A light-emitting structure (306) contains a main section (302), a pattern of ridges (314) situated along the main section, and a plurality of light-emissive regions (313) situated in spaces between the ridges. The light-emissive regions produce light of various colors upon being hit by electrons. The ridges, which extend further away from the main section than the light-emissive regions, are substantially non-emissive of light when hit by electrons. Each ridge includes a dark region. The ridges thereby form a raised black matrix that improves contrast and color purity. The dark region of each ridge may be formed with metal, ceramic, semiconductor, or carbide. Each ridge may include an additional region (314b) of different chemical composition than the dark region.
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