| 摘要 |
A method for driving an image display device (110) comprising at least one backlight lamp (111) and a display screen (112) is described. The method comprises the steps of: receiving an image data signal (D); on the basis of the image data signal (D), calculating a content-related backlight control signal (SCL(D)) for the backlight lamp (111) for setting the intensity of the backlight; generating an average signal (SAV) that represents a time-average of the power consumed by the backlight lamp (111); comparing the average signal (SAV) with a reference signal (SREF); on the basis of the calculated content-related backlight control signal (SCL(D)), taking into account the result of the said comparison, generating an actual backlight control signal (SCL(A)) for the backlight lamp (111).
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