Optical filter comprising transparent support and filter layer containing dye and binder polymer
AssigneeFuji Photo Film Co., Ltd.
InventorYoshiharu Yabuki
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Abstract
An optical filter comprises a transparent support and a filter layer. The filter layer contains a dye and a binder polymer. The dye is in a non-aggregated form. The dye has an absorption maximum with a half width of not more than 100 nm within the wavelength region of 560 to 620 nm. The transparent support, the filter layer or an optional layer contains an o-substituted phenol represented by the formula (I), (II) or (III) as a ultraviolet absorbing agent.
Claims10
An optical filter which comprises a transparent support and a filter layer containing a dye and a binder polymer, wherein the dye is in a non-aggregated form having an absorption maximum with a half width of not more than 100 nm within the wavelength region of 560 to 620 nm, and wherein the transparent support, the filter layer or an optional layer contains an o-substituted phenol represented by the formula (I), (II) or (III) as a ultraviolet absorbing agent, and wherein the filter layer further contains a second dye in a non-aggregated form having a second absorption maximum within the wavelength region of 500 to 550 nm:
- in which the benzene rings a and b may have a substituent group;
- in which Ar1 is an aryl group or an aromatic heterocyclic group;
- —L— is a single bond or —O—;
- and the benzene ring c may have a substituent group;
- in which the benzene ring d and the triazine ring e may have a substituent group;
- and the benzene ring d may be condensed with another aromatic ring or a heterocyclic ring.
A plasma display panel having a display surface covered with an optical filter which comprises a transparent support and a filter layer containing a dye and a binder polymer, wherein the dye is in a non-aggregated form having an absorption maximum with a half width of not more than 100 nm within the wavelength region of 560 to 620 nm, and wherein the transparent support, the filter layer or an optional layer contains an o-substituted phenol represented by the formula (I), (II) or (III) as a ultraviolet absorbing agent:
- in which the benzene rings a and b may have a substituent group;
- in which Ar1 is an aryl group or an aromatic heterocyclic group;
- —L— is a single bond or —O—;
- and the benzene ring c may have a substituent group;
- in which the benzene ring d and the triazine ring e may have a substituent group;
- and the benzene ring d may be condensed with another aromatic ring or a heterocyclic ring.
Dependencies are inferred from the claim text.