Method for optimizing brightness in a display device and apparatus for implementing the method

摘要

The invention relates to a method for optimizing brightness in a display device having a plurality of luminous elements corresponding to the pixels of a picture, wherein the time duration of a video frame or video field is divided into a plurality of sub fields during which the luminous elements can be activated for light emission with sustain pulses corresponding to a sub field code word which is used for brightness control, the total number of sustain pulses being determined in view of a selected power mode function of picture load the method including the following steps:- setting a threshold value in relation to the picture load,- comparing, for a frame, the number of the current sustain pulse to said threshold value,- if the number of the current sustain pulses is below the threshold value, the sustain pulses are generated at a fixed frequency,- if the number of the current sustain pulses is above the threshold value, the sustain pulses are generated at an evolving frequency.;This invention applies mainly to PDP and all displays controlled by using a PWM.