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US 9,430,972 B2Granted
Electrowetting display device driving method
AssigneeAmazon Technologies, Inc.
InventorsHenricus Petronella Maria Derckx, Jozef Elisabeth Aubert, Johannes Wilhelmus Hendrikus Mennen
Life of this patent
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Abstract
An electrowetting display device has at least one display element. The method of driving the display device comprises receiving data representing a display effect for display by the element. A driving scheme is selected for the display element in dependence on a characteristic of the data. The driving scheme is selected from at least an analog driving scheme and a pulse width modulation driving scheme.
Claims23
A method of driving a display element of an electrowetting display device, the display element comprising a first fluid and a second fluid immiscible with the first fluid, the method comprising:
- receiving data representing a display effect for display by the display element;
- selecting a driving scheme for driving the display element to display the display effect, in dependence on a characteristic of the data and from at least:
- a) an analog driving scheme in which an analog driving scheme voltage is applied to the display element to drive the display element to an analog driving scheme configuration of the first fluid and the second fluid corresponding to the display effect, the display effect depending on a magnitude of the analog driving scheme voltage;
- and
- b) a pulse width modulation driving scheme in which:
- a first pulse width modulation driving scheme voltage is applied to the display element to drive the display element to a first pulse width modulation driving scheme configuration of the first fluid and the second fluid, and
- a second pulse width modulation driving scheme voltage is applied to the display element to drive the display element to a second pulse width modulation driving scheme configuration of the first fluid and the second fluid,
- the first pulse width modulation driving scheme voltage being higher than the second pulse width modulation driving scheme voltage, the display effect depending on a first duration that the first pulse width modulation driving scheme voltage is applied to the display element and a second duration that the second pulse width modulation driving scheme voltage is applied to the display element;
- and
- driving the display element using the driving scheme selected in dependence on the characteristic of the data.
7 more elements
A display controller for driving a display element of an electrowetting display device, the display element comprising a first fluid and a second fluid immiscible with the first fluid, the display controller comprising at least one processor, and at least one memory comprising computer program instructions,
- the at least one memory and the computer program instructions being configured to, with the at least one processor, cause the display controller to perform a method of driving the electrowetting display device comprising:
- receiving data representing a display effect for display by the display element;
- selecting a driving scheme for driving the display element to display the display effect, in dependence on a characteristic of the data and from at least:
- a) an analog driving scheme in which an analog driving scheme voltage is applied to the display element to drive the display element to an analog driving scheme configuration of the first fluid and the second fluid corresponding to the display effect, the display effect depending on a magnitude of the analog driving scheme voltage;
- and
- b) a pulse width modulation driving scheme in which:
- a first pulse width modulation driving scheme voltage is applied to the display element to drive the display element to a first pulse width modulation driving scheme configuration of the first fluid and the second fluid, and
- a second pulse width modulation driving scheme voltage is applied to the display element to drive the display element to a second pulse width modulation driving scheme configuration of the first fluid and the second fluid,
- the first pulse width modulation driving scheme voltage being higher than the second pulse width modulation driving scheme voltage, the display effect depending on a first duration that the first pulse width modulation driving scheme voltage is applied to the display element and a second duration that the second pulse width modulation driving scheme voltage is applied to the display element;
- and
- driving the display element using the driving scheme selected in dependence on the characteristic of the data.
8 more elements
An electrowetting display apparatus comprising:
- an electrowetting display device comprising a plurality of display elements, the plurality of display elements comprising a display element having:
- a first support plate,
- a second support plate,
- a first fluid and a second fluid immiscible with the first fluid, the first fluid and the second fluid located between the first support plate and the second support plate,
- at least one electrode configured to apply a voltage to change a configuration of the first fluid and the second fluid;
- a display driver connected to the at least one electrode and configured to output the voltage to change the configuration of the first fluid and the second fluid;
- and
- a display controller comprising at least one processor, and at least one memory comprising computer program instructions, the at least one memory and the computer program instructions being configured to, with the at least one processor, cause the display controller to, using the display driver, perform a method of driving the display element comprising:
- receiving data representing a display effect for display by the display element;
- selecting a driving scheme for driving the display element to display the display effect, in dependence on a characteristic of the data and from at least:
- a) an analog driving scheme in which an analog driving scheme voltage is applied to the display element to drive the display element to an analog driving scheme configuration of the first fluid and the second fluid corresponding to the display effect, the display effect depending on a magnitude of the analog driving scheme voltage;
- and
- b) a pulse width modulation driving scheme in which:
- a first pulse width modulation driving scheme voltage is applied to the display element to drive the display element to a first pulse width modulation driving scheme configuration of the first fluid and the second fluid, and
- a second pulse width modulation driving scheme voltage is applied to the display element to drive the display element to a second pulse width modulation driving scheme configuration of the first fluid and the second fluid,
- the first pulse width modulation driving scheme voltage being higher than the second pulse width modulation driving scheme voltage, the display effect depending on a first duration that the first pulse width modulation driving scheme voltage is applied to the display element and a second duration that the second pulse width modulation driving scheme voltage is applied to the display element;
- and
- driving the display element using the driving scheme selected in dependence on the characteristic of the data.
15 more elements
Dependencies are inferred from the claim text.