Line segment update method for electro-optic displays
First Claim
1. A method of driving an electro-optic display provided with a stylus or pen and pen-tracking software, the method comprising:
- detecting a first line segment drawn on the electro-optic display by the stylus or pen;
rendering the first line segment in low contrast using a first drive scheme having waveforms shorter than a period required to completely switch the electro-optic display between its extreme optical states;
detecting a second line segment drawn on the electro-optic display by the stylus or pen, the second line segment not overlapping the first line segment;
rendering the second line segment in low contrast using the first drive scheme; and
after both the first line segment and the second line segment have been rendered in low contrast using the first drive scheme,rendering both the first line segment and the second line segment at a same time using a second drive scheme different from the first drive scheme, wherein the second drive scheme provides full contrast levels and has a maximum update time longer than an update time of the first drive scheme.
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Accused Products
Abstract
A touch screen electro-optic display is arranged such that upon a touch being detected on the display surface, the display surface surrounding the touch “blinks” by being driven to a different optical state, then back to its original state. A second method uses a display having a pen or stylus which can draw lines upon the display. A first line segment is detected and its area updated using a first drive scheme having short waveforms. The area of a second line segment is updated using the first drive scheme. Thereafter, the areas of both line segments are updated using a second drive scheme different from the first drive scheme.
131 Citations
7 Claims
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1. A method of driving an electro-optic display provided with a stylus or pen and pen-tracking software, the method comprising:
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detecting a first line segment drawn on the electro-optic display by the stylus or pen; rendering the first line segment in low contrast using a first drive scheme having waveforms shorter than a period required to completely switch the electro-optic display between its extreme optical states; detecting a second line segment drawn on the electro-optic display by the stylus or pen, the second line segment not overlapping the first line segment; rendering the second line segment in low contrast using the first drive scheme; and after both the first line segment and the second line segment have been rendered in low contrast using the first drive scheme, rendering both the first line segment and the second line segment at a same time using a second drive scheme different from the first drive scheme, wherein the second drive scheme provides full contrast levels and has a maximum update time longer than an update time of the first drive scheme. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification