Fast response color waveforms for multiparticle electrophoretic displays
AssigneeE Ink Corporation
InventorsMeital Rannon, Ian Hunter, Sanket Diwale, Amit Deliwala
Life of this patent
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Abstract
Fast response color waveforms for driving multi-particle color electrophoretic media to improve the user experience of a display, e.g. a tablet, monitor, or interactive sign, that incorporates multi-particle color electrophoretic media. In particular, the waveforms result in a sharp and immediate response, which is preferred when writing with a stylus, or typing on a keyboard, or interacting with an icon on a sign, such as a timetable.
Claims19
A method of causing a color state transition in a four-particle electrophoretic display comprising one negative particle set and three different positive particle sets, wherein each particle set is a different color and one of the particle sets is white in color, and wherein the display is configured to provide at least five voltages to pixel electrodes of the display, V++, V+, 0, V−, and V−−, the method comprising:
- providing a first sequence including at least three sequential frames of a same polarity (+ or −), wherein a first frame of the first sequence is at a respective highest voltage (V++, V−−);
- providing a second sequence including at least three sequential frames of an opposite polarity (− or +);
- and
- providing a third sequence including at least one frame of the same polarity (+ or −) or zero volts.
A method of causing a color state transition in a four-particle electrophoretic display comprising one positive particle set and three different negative particle sets, wherein each particle set is a different color and one of the particle sets is white in color, and wherein the display is configured to provide at least five voltages to pixel electrodes of the display, V++, V+, 0, V−, and V−−, the method comprising:
- providing a first sequence including at least three sequential frames of a same polarity (+ or −), wherein a first frame of the first sequence is at a respective highest voltage (V++, V−−);
- providing a second sequence including at least three sequential frames of an opposite polarity (− or +);
- and
- providing a third sequence including at least one frame of the same polarity (+ or −) or zero volts.
A method of causing a color state transition in a four-particle electrophoretic display comprising two negative particle sets and two different positive particle sets, wherein each particle set is a different color and one of the particle sets is white in color, and wherein the display is configured to provide at least five voltages to pixel electrodes of the display, V++, V+, 0, V−, and V−−, the method comprising:
- providing a first sequence including at least three sequential frames of a same polarity (+ or −), wherein a first frame of the first sequence is at a respective highest voltage (V++, V−−);
- providing a second sequence including at least three sequential frames of an opposite polarity (− or +);
- and
- providing a third sequence including at least one frame of the same polarity (+ or −) or zero volts.
Dependencies are inferred from the claim text.