Method and apparatus for sensing the state of an electrophoretic display
AssigneeE Ink Corporation
InventorsJOSEPH M. JACOBSON, PAUL DRZAIC
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Abstract
A method for sensing the state of an electrophoretic display includes the steps of applying an electrical signal to a display element, measuring an electrical response for the display element, and deducing the state of the display element from the measured electrical response.
Claims29
A method for measuring the physical state of an electrophoretic display element, comprising the steps of:
- (a) providing an electrophoretic display element comprising a capsule containing a plurality of particles dispersed in a suspension fluid and having two electrodes adjacent said capsule;
- (b) applying an electrical signal to said two electrodes;
- (c) measuring an electrical characteristic of the display element, the electrical characteristic generated in response to the applied electrical signal;
- and
- (d) deducing the state of the electrophoretic display element based on the measured electrical characteristic.
An apparatus for determining the physical state of an electrophoretic display element having two electrodes adjacent a capsule containing a plurality of particles dispersed in a suspension fluid, comprising:
- (a) a signal generator for applying an electrical signal to two electrodes of a display element;
- (b) a detection circuit for measuring an electrical response of the display element to the applied signal;
- and
- (c) a discriminator circuit for determining a state of the display element based on said electrical response.
An electrophoretic display comprising a plurality of display elements and capable of determining the physical state of an individual display element, the display comprising:
- (a) an electrophoretic display element comprising a capsule containing a plurality of particles dispersed in a suspension fluid, and having two electrodes adjacent said capsule;
- (b) a signal generator for applying an electrical signal to said two electrodes;
- (c) a detection circuit for measuring an electrical response of said display element to said applied signal;
- and
- (d) a discriminator circuit for determining a state of said display element based on said electrical response.
Dependencies are inferred from the claim text.