System and method for predicting a failure of a backlight...

Details System and method for predicting a failure of a backlight... System and method for predicting a failure of a backlight...

G - Physics

09

G

G09G 3/34 (2006.01)

Patent

CA 2662774

An early warning system and method for predicting a failure of a backlight of any display that uses internal illumination, such as a liquid crystal display (LCD), digital light processing~ (DLP), or liquid crystal on silicon (LCoS). This display could be a flat screen type or a projector type. A display indicating that failure is imminent within a certain period of time is provided. A countdown display of life remaining may also be provided. Color temperature of the backlight is monitored and compared over time to form the prediction of failure. Measurements may also include measurements of individual components of light, such as the red, green, and blue components. Components may be compared individually over time to detect a color shift that reaches a threshold of prediction failure.

Système et procédé de pré-alerte pour la prévision de défaillance de rétroéclairage d'afficheur, du type afficheur à cristaux liquides (LCD), digital light processing~ (DLP), ou cristaux liquides sur silicium (LCoS). Cet afficheur pourrait être du type à écran plat ou projecteur. On décrit un afficheur indiquant qu'une défaillance est imminente dans un certain délai. Un affichage de compte à rebours de vie restante peut également être prévu. On contrôle la température de couleur du rétroéclairage et la compare dans le temps pour établir la prévision de défaillance. Les mesures peuvent aussi être des mesures de composantes individuelles de la lumière, par exemple rouge, vert et bleu. On peut comparer les composantes individuellement dans le temps pour déceler un décalage de couleur atteignant un seuil de défaut de prévision.

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