Methods for driving electro-optic displays
First Claim
1. A method for rewriting an electrophoretic display from a first image to a second image, the display having a plurality of pixels divided into a plurality of rows, the method comprising:
- (a) writing a first image on the display;
(b) after the first image has been written on the display, selecting each of the rows of pixels in succession and applying to each of the pixels in the selected row either a drive voltage or a non-drive voltage, the scanning of all the rows of pixels being completed in a first frame period; and
(c) repeating the scanning of the rows of pixels during a second frame period, thereby forming a second image on the display;
wherein the scanning of the rows of pixels is interrupted during a pause period between the first and second frame periods, this pause period being not longer than the first or second frame period.
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Abstract
An electro-optic display, having at least one pixel capable of achieving any one of at least four different gray levels including two extreme optical states, is driven by displaying a first image on the display, and rewriting the display to display a second image thereon, wherein, during the rewriting of the display, any pixel which has undergone a number of transitions exceeding a predetermined value without touching an extreme optical state, is driven to at least one extreme optical state before driving that pixel to its final optical state in the second image.
233 Citations
8 Claims
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1. A method for rewriting an electrophoretic display from a first image to a second image, the display having a plurality of pixels divided into a plurality of rows, the method comprising:
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(a) writing a first image on the display; (b) after the first image has been written on the display, selecting each of the rows of pixels in succession and applying to each of the pixels in the selected row either a drive voltage or a non-drive voltage, the scanning of all the rows of pixels being completed in a first frame period; and (c) repeating the scanning of the rows of pixels during a second frame period, thereby forming a second image on the display; wherein the scanning of the rows of pixels is interrupted during a pause period between the first and second frame periods, this pause period being not longer than the first or second frame period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification