Construction of an epid bar graph
First Claim
1. An electrophoretic bar graph display comprisingtwo separated substrates with at least one substrate being transparent,an electrophoretic fluid having suspended pigment particles filling the space between said substrates,a first electrode structure formed on the surface of one of said substrates facing said fluid and a second electrode structure formed on a surface of the other of said substrates facing said fluid with at least one of said electrode structures being substantially transparent,said first electrode structure providing a plurality of electrodes and said second electrode structure providing an equal number of electrodes for each of said plurality of electrodes,means for providing at least one of three voltages to each of said first electrodes, andmeans for providing at least one of two voltages to each of said second electrodes, said two voltages alternating in value with said three voltages.
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Abstract
An electrophoretic bar graph display is provided wherein the number of electrodes is significantly reduced. This occurs by application of one of three voltage values to each of a plurality of electrodes at one side of the display in accordance with the value to be displayed, and one of two voltage values to each of a number of electrodes at the other side of the display corresponding to each one of the plurality. The two voltage values alternate in value with the three voltage values. A cursor type display can also be provided having an indication segment of contrasting color from the remaining electrophoretic fluid.
170 Citations
12 Claims
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1. An electrophoretic bar graph display comprising
two separated substrates with at least one substrate being transparent, an electrophoretic fluid having suspended pigment particles filling the space between said substrates, a first electrode structure formed on the surface of one of said substrates facing said fluid and a second electrode structure formed on a surface of the other of said substrates facing said fluid with at least one of said electrode structures being substantially transparent, said first electrode structure providing a plurality of electrodes and said second electrode structure providing an equal number of electrodes for each of said plurality of electrodes, means for providing at least one of three voltages to each of said first electrodes, and means for providing at least one of two voltages to each of said second electrodes, said two voltages alternating in value with said three voltages.
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8. An electrophoretic cursor type display comprising two separated substrates with at least one substrate being transparent,
an electrophoretic fluid having suspended pigment particles filling the space between said substrates, a first electrode structure formed on the surface of one of said substrates facing said fluid and a second electrode structure formed on a surface of the other of said substrates facing said fluid with at least one of said electrode structures being substantially transparent, said first electrode structure providing a plurality of electrodes and said second electrode structure providing an equal number of electrodes for each of said plurality of electrodes, means for providing at least one of two voltages to each of said first electrodes, and means for providing at least one of two different voltages to each of said second electrodes, said two different voltages alternating in value with said two voltages provided to each of said first electrodes, wherein only a segment of said electrophoretic fluid is seen with a contrasting color from remaining portions of said electrophoretic fluid, said segment being provided at an indicating position.
Specification