Method of driving a foil display screen and device having such a display screen
First Claim
1. A method of driving a display screen built up of a group of lines, particularly a foil display screen comprising at least one light source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes, and means for applying control voltage signals to the row and column electrodes, characterized in that, while a light source is switched off, the group or a part of the group of lines is written line by line with the image to be displayed, whereafter the light source is switched on for a given time interval.
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Abstract
The invention relates to a method of controlling a display screen, particularly a foil display built up of a number of lines, the display screen comprising at least one light source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes and means for applying control voltage signals to the invention also relates to a display source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes and means for applying control voltage signals to the row and column electrodes. Because of a minimum switching time of pixels, not all pixels, i.e. lines can be activated immediately when the display screen is addressed line by line. To avoid this problem, the invention provides a novel addressing method comprising the step of addressing a group of lines or a part of a group of lines while the light source is switched off, followed by a step of illuminating the display screen for a predetermined interval by switching on the light source.
35 Citations
11 Claims
- 1. A method of driving a display screen built up of a group of lines, particularly a foil display screen comprising at least one light source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes, and means for applying control voltage signals to the row and column electrodes, characterized in that, while a light source is switched off, the group or a part of the group of lines is written line by line with the image to be displayed, whereafter the light source is switched on for a given time interval.
- 7. A device having a display screen comprising at least one light source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes, and means for applying control voltage signals to the row and column electrodes, characterized in that, while a light source is switched off, the selection means write the group or a part of the group of lines line by line with the image to be displayed and subsequently energize the light source for a given time interval.
Specification