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US 9,869,855 B2Granted
Picture element driven by two sets of grayscale values, one set being less than the other
AssigneeAmazon Technologies, Inc.
InventorsAnthony John Slack, Bokke Johannes Feenstra
Life of this patent
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Abstract
An electrowetting display device includes a control system for changing a configuration of first, second and third fluids by applying a voltage level of a first voltage to a first electrode and by applying a voltage level of a second voltage to a second electrode. The voltage level of the first voltage is selected from a first plurality of voltage levels and the voltage level of the second voltage is selected from a second plurality of voltage levels, the second plurality of voltage levels comprising fewer voltage levels than the first plurality of voltage levels.
Claims27
An electrowetting display device comprising a picture element, the picture element comprising:
- a support plate comprising:
- a first surface;
- and
- a non-switchable reflective layer;
- a second surface;
- a first fluid, a second fluid and a third fluid, the first fluid and the third fluid arranged on at least part of the first surface and the second surface, respectively, and the second fluid immiscible with the first fluid and the third fluid, the first fluid, the second fluid and the third fluid located between the first surface and the second surface;
- and
- a first electrode associated with the first surface and a second electrode associated with the second surface,
- the electrowetting display device comprising a control system operable to, in dependence on input data relating to a grey scale level for display by the picture element, change a configuration of each of the first fluid, the second fluid and the third fluid to a respective configuration corresponding to the grey scale level by application of a first voltage level of a first grey scale voltage to the first electrode and by application of a second voltage level of a second grey scale voltage to the second electrode,
- wherein the control system is arranged such that the first voltage level is selected from a first plurality of voltage levels and the second voltage level is selected from a second plurality of voltage levels, the second plurality of voltage levels comprising fewer voltage levels than the first plurality of voltage levels.
7 more elements
A display device comprising a picture element operable to change a characteristic of radiation which passes through the picture element, the picture element comprising:
- a support plate comprising a non-switchable reflective layer;
- a first electrode associated with the support plate;
- a second electrode;
- and
- a first display element and a second display element configurable to change the characteristic,
- the display device comprising a control system operable to, in dependence on input data relating to a grey scale level for display by the picture element, change the characteristic by application of a first voltage level of a first grey scale voltage to the first electrode and application of a second voltage level of a second grey scale voltage to the second electrode, to determine a respective configuration of the first display element and the second display element to correspond to the grey scale level,
- wherein the control system is arranged such that the first voltage level is selected from a first plurality of voltage levels and the second voltage level is selected from a second plurality of voltage levels, the second plurality of voltage levels comprising fewer voltage levels than the first plurality of voltage levels.
4 more elements
A control system for controlling a picture element comprising:
- a support plate comprising a non-switchable reflective layer;
- a first electrode associated with the support plate;
- a second electrode;
- and
- a first display element and a second display element each configurable to change a characteristic of radiation passing through the picture element,
- the control system operable to, in dependence on input data relating to a grey scale level for display by the picture element, change the characteristic by application of a first voltage level of a first grey scale voltage to the first electrode and application of a second voltage level of a second grey scale voltage to the second electrode, to determine a respective configuration of the first display element and the second display element to correspond to the grey scale level,
- wherein the control system is operable to select the first voltage level from a first plurality of voltage levels and to select the second voltage level from a second plurality of voltage levels, the second plurality of voltage levels comprising fewer voltage levels than the first plurality of voltage levels.
4 more elements
A method of controlling a picture element, the method comprising:
- determining a first voltage level of a first grey scale voltage, in dependence on input data relating to a grey scale level for display by the picture element, for applying to a first electrode of the picture element, the first electrode associated with a support plate of the picture element, the support plate comprising a non-switchable reflective layer, the determining the first voltage level comprising selecting the first voltage level from a first plurality of voltage levels;
- determining a second voltage level of a second grey scale voltage for applying to a second electrode of the picture element, in dependence on the input data relating to the grey scale level, the determining the second voltage level comprising selecting the second voltage level from a second plurality of voltage levels, the second plurality of voltage levels comprising fewer voltage levels than the first plurality of voltage levels;
- generating the first grey scale voltage with the first voltage level;
- generating the second grey scale voltage with the second voltage level;
- transmitting the first grey scale voltage to the first electrode, for applying the first grey scale voltage to the first electrode to determine a configuration of a first display element of the picture element;
- and
- transmitting the second grey scale voltage to the second electrode, for applying the second grey scale voltage to the second electrode to determine a configuration of a second display element of the picture element, the configuration of the first display element and the configuration of the second display element corresponding to the grey scale level.
4 more elements
Dependencies are inferred from the claim text.