Uv led control loop and controller for uv curing

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 2/48 (2006.01) C08J 7/18 (2006.01)

Patent

CA 2552816

A UV curing apparatus and method is provided for efficiently decreasing the curing time for the curing of a UV curable product, article or other object having a UV curable coating, ink or adhesive by at least one array of UV LED chips on a substrate. Advantageously, the UV LED chips are driven at a current ranging from (2) to (4) times higher (EX. 3.6 Amps.) than the normal operating current (Ex. 1.2 Amps.) for the UV LED chips to cause the UV LED chips to emit UV light at a much greater intensity (y-axis of graph) than when the UV LED chips are driven at their normal operating current. For enhanced results, the UV LED chips are cooled during operation of the apparatus and system, so that the UV LED chips can be driven at a higher current for a longer period of time.

L'invention concerne un appareil et un procédé de séchage aux UV qui permettent de réduire efficacement le temps de séchage d'un produit, article ou autre objet à sécher aux UV présentant un revêtement, une encre ou un adhésif à sécher aux UV par au moins un réseau de microplaquettes DEL UV sur un substrat. L'intérêt est que les microplaquettes DEL UV sont excitées par un courant supérieur de 2 à 4 fois (Ex. 3,6 Amp.) au courant d'exploitation normal (Ex. 1,2 Amp) pour les amener à émettre de la lumière UV à une intensité beaucoup plus grande (axe y du graphique) que lorsque les microplaquettes DEL UV sont excitées au niveau de leur courant d'exploitation normal. Pour de meilleurs résultats, les microplaquettes DEL UV sont refroidies pendant le fonctionnement de l'appareil et du système, ainsi, les microplaquettes peuvent être excitées par un courant supérieur pendant une plus longue durée.

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