Abstract: The invention relates to a method and a device for noise reduction in a pulse-width controlled image display device. A monitoring of whether the brightness of several sequential image points is brighter than a given brightness threshold value occurs. If not the case, the delayed but otherwise unchanged input signal is supplied to the display. If, on the other hand, the brightness of several sequential image points is less than the given threshold brightness value, a mean value generation for the brightness values of several sequential image points occurs and said mean value is supplied to the display.

Abstract: The invention relates to a method and a device for noise reduction in a pulse-width controlled image display device. A monitoring of whether the brightness of several sequential image points is brighter than a given brightness threshold value occurs. If not the case, the delayed but otherwise unchanged input signal is supplied to the display. If, on the other hand, the brightness of several sequential image points is less than the given threshold brightness value, a mean value generation for the brightness values of several sequential image points occurs and said mean value is supplied to the display.

Abstract: The invention relates to a method and a device for improving the grey scale resolution of a pulse width modulated image display device. The time interval available for representing an image is divided into successive weighted partial time intervals comprising partial time intervals having low weighting and partial time intervals having high weighting. If the evaluation of the luminosity of the image to be represented causes a dark image to be detected, partial time intervals having high weighting are not required and the number of partial time intervals having low weightings is increased by using additional partial time intervals having low weightings. The weightings of the additional partial time intervals are different to the weightings of the first partial time intervals having low weightings. The grey scale resolution is thereby improved for dark images.