Improved color-converting photoluminescent film

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 11/00 (2006.01) C09K 11/06 (2006.01) C09K 11/08 (2006.01) H05B 33/14 (2006.01)

Patent

CA 2566028

An improved color-converting photoluminescent film that provides visible light emission in the red to green portion of the visible spectrum when excited by blue light. The color-converted photoluminescent film of the invention is patternable and has improved luminous efficiency and stability and is suitable for use in electroluminescent displays. The film comprises a mixture of a clear UV curable resin and photo-initiator which does not absorb blue light; and fluorescent pigment particles, wherein a molecular additive is optionally provided in to either or both of the pigment particles and curable resin. The mixture is screen printed onto a substrate to form a film and UV cured.

L'invention concerne un film amélioré photoluminescent convertissant la couleur qui fournit une émission de lumière visible dans la partie rouge ou verte du spectre visible, lorsqu'elle est excitée par une lumière bleue. Le film photoluminescent convertissant la couleur peut présenter des motifs et il présente également une efficacité et une stabilité lumineuse améliorées et il convient très bien à des écrans d'affichage électroluminescents. Le film comprend un mélange d'une résine claire séchant aux ultraviolets et un photoinitiateur qui n'absorbe pas la lumière bleue, et des particules de pigments fluorescentes, un additif moléculaire étant éventuellement ajouté dans les particules de pigments ou dans la résine durcissable. Le mélange est imprimé par sérigraphie sur un substrat, de manière à former un film séché par les ultraviolets.

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