Filters for electronic display device
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United States of America Patent
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Nov 16, 2004
Grant Date -
Sep 4, 2003
app pub date -
Jan 22, 2003
filing date -
Jan 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides filters for an electronic display device comprising a squarylium compound represented by the general formula (I): ##STR1## wherein X represents a nitrogen atom or an oxygen atom; Q represents a carbon atom, a nitrogen atom, an oxygen atom or a sulfur atom; and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and m are as defined in the specification. The filters for an electronic display device of the present invention can selectively shield the light having such a wavelength that reduces the color purity, and thereby can provide clear images.
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