Method and device for reducing line load effect
AssigneeThomson Licensing
InventorsSébastien Weitbruch, Cédric Thebault, Carlos Correa
Life of this patent
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Abstract
The present invention relates to a method for processing data of a picture to be displayed on a display panel with persistent luminous elements in order to reduce load effect in said display means. The method comprises the following steps: computing, for each subfield, the amount of activated luminous elements in each line of luminous elements of the display panel, called line load, calculating, for each subfield, the maximal difference of line loads of two consecutive lines of the display panel, and selecting, for each subfield, a sustain frequency in accordance with its maximal load difference in order to reduce line load effect.
Claims13
Method for processing data of a picture to be displayed on a display panel with persistent luminous elements during a frame comprising a plurality of subfields, each subfield comprising an addressing phase during which the luminous elements of the panel are activated or not in accordance with the picture data and a sustain phase during which the activated luminous elements are illuminated by sustain pulses, wherein it comprises the following steps:
- computing, for each subfield, the amount of activated luminous elements in each line of luminous elements of the display panel, called line load,
- calculating, for each subfield, for a current frame and a plurality of frames preceding said current frame, the maximal line load difference between two consecutive lines of the display panel, and
- selecting, for each subfield, a sustain frequency reduced in accordance with its maximal load difference in order to reduce line load effect.
Device for processing data of a picture to be displayed on a display panel with persistent luminous elements during a frame comprising a plurality of subfields, each subfield comprising an addressing phase during which the luminous elements of the panel are activated or not in accordance with the picture data and a sustain phase during which the activated luminous elements are illuminated by sustain pulses, wherein it comprises:
- means for computing, for each subfield, the amount of activated luminous elements in each line of luminous elements of the display panel, called line load, and for calculating, for each subfield, for a current frame and a plurality of frames preceding said current frame, the maximal difference of line loads of two consecutive lines of the display panel, and
- means for selecting, for each subfield, a lower sustain frequency being reduced in accordance with its maximal load difference in order to reduce line load effect.
Dependencies are inferred from the claim text.