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US 7,605,797 B2Granted
Particle movement-type display apparatus and driving method thereof
AssigneeCanon Kabushiki Kaisha
InventorShunichi Shido
Life of this patent
Estimating the term…
Abstract
In order to permit stable gradation display or high-speed display, when predetermined voltages are applied to a collection electrode 1 and a display electrode 2, respectively, to move particles between the collection electrode 1 and the display electrode 2, a voltage is applied to a pressing electrode 4 to press the particles against the display electrode 2 so that they are stabilized on the display electrode 2 with a uniform spacing therebetween.
Claims7
A particle movement-type display apparatus, comprising:
- a plurality of pixels each comprising a first electrode, a second electrode, a third electrode, a partition wall, and a dispersion liquid for dispersing a plurality of particles to effect display,
- wherein the first electrode is disposed as part of the partition wall, the third electrode is disposed opposite to the second electrode, the partition wall extends from the second electrode to the third electrode so as to separate adjacent pixels, and the dispersion liquid is sealed in a closed space defined by the first electrode, the second electrode and the third electrode, and
- wherein, when predetermined voltages are applied to the first electrode and the second electrode so that the particles are gradually moved towards one of the first electrode and the second electrode, another voltage for generating an electric field is applied to the third electrode so as to press the particles against the first and second electrodes to effect a predetermined gradation level of display proportional to the predetermined voltages applied to the first electrode and the second electrode.
A method of driving a particle movement-type display apparatus, comprising:
- providing a particle movement-type display apparatus including a plurality of pixels each comprising a first electrode, a second electrode, a third electrode, a partition wall, and a dispersion liquid for dispersing a plurality of particles to effect display, wherein the first electrode is disposed as part of the partition wall, the third electrode is disposed opposite to the second electrode, the partition wall extends from the second electrode to the third electrode so as to separate adjacent pixels, and the dispersion liquid is sealed in a closed space defined by the first electrode, the second electrode and the third electrode;
- and
- applying predetermined voltages to the first electrode and the second electrode so that the particles are gradually moved towards one of the first electrode and second electrode, while applying another voltage to the third electrode for generating an electric field so as to press the particles against the first and second electrodes to effect a predetermined gradation level of display proportional to the predetermined voltages applied to the first electrode and the second electrode.
Dependencies are inferred from the claim text.