Thermal response correction system

B - Operations – Transporting – 41 – J

Patent

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B41J 2/365 (2006.01) B41J 2/36 (2006.01)

Patent

CA 2458171

A model of a thermal print head is provided that models the thermal response of thermal print head elements to the provision of energy to the print head elements over time. The thermal print head model generates predictions of the temperature of each of the thermal print head elements at the beginning of each print head cycle based on: (1) the current ambient temperature of the thermal print head, (2) the thermal history of the print head, and (3) the energy history of the print head. The amount of energy to provide to each of the print head elements during a print head cycle to produce a spot having the desired density is calculated based on: (1) the desired density to be produced by the print head element during the print head cycle, and (2) the predicted temperature of the print head element at the beginning of the print head cycle.

L'invention concerne un modèle de tête d'impression thermique qui modélise la réponse thermique d'éléments d'une tête d'impression thermique à l'approvisionnement en énergie de ces éléments dans le temps. Le modèle de tête d'impression thermique génère des prévisions thermiques relatives à chaque élément de la tête d'impression thermique au début de chaque cycle d'impression sur la base des facteurs suivants : (1) la température ambiante momentanée de la tête d'impression thermique, (2) l'historique thermique de la tête d'impression, (3) l'historique énergétique de la tête d'impression. La quantité d'énergie à fournir à chacun des éléments de la tête d'impression pendant le cycle d'impression pour produire un point ayant la densité souhaitée est calculée sur la base de: (1) la densité souhaitée que l'élément de la tête d'impression doit produire durant le cycle d'impression, et (2) la température prévue de l'élément de la tête d'impression au début du cycle d'impression.

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