Patent application number | Description | Published |
20100053234 | DRIVING OF ELECTROWETTING DISPLAYS - The invention relates to a method of driving an electrowetting display which includes a plurality of electrowetting elements, the display comprising at least one first fluid and a second fluid immiscible with each other, each of the electrowetting elements comprising at least one surface area. In a first, relatively low voltage, driving state of an electrowetting element the second fluid tends to cover the at least one surface area, and in a second, relatively high voltage, driving state of an electrowetting element the first fluid tends to cover the at least one surface area. The method comprises: providing a voltage booster circuit to generate a voltage signal to be applied across one or more selected ones of the plurality of electrowetting elements; and during driving of the one or more selected elements in the second driving state, selectively switching the voltage booster circuit on and off such that the voltage booster circuit is operative only some of the time and the voltage signal includes a voltage ripple variation. The invention further relates to electrowetting display apparatus adapted to perform the method of the invention. | 03-04-2010 |
20100079434 | DRIVING OF ELECTRO-OPTIC DISPLAYS - The invention relates to a method of driving of an electro-optic display having image regions. Each image region has: a first driving state in which a zero voltage, substantially equal to zero, is applied across the image region; and a second driving state in which a non-zero voltage, substantially different from the zero voltage, is applied across the image region. The method of the invention comprises applying: a common voltage signal to a plurality of the image regions; and an actuating voltage signal to one or more selected ones of the plurality of image regions. The method comprises varying both the common voltage signal and the actuating voltage signal when switching the selected regions between the first driving state and the second driving state. The invention further relates to electro-optic display apparatus having image regions and comprising driving circuitry adapted to perform the method of the invention. | 04-01-2010 |
20100177026 | ELECTROWETTING SYSTEM AND METHOD FOR OPERATING - The present invention relates to an electrowetting system comprising an electrowetting element, a driver stage for applying a voltage to the element, and a switch connecting the electrowetting element to an output of the driver stage. The element comprises a first fluid and a second, immiscible fluid. The instantaneous position of the fluids is dependent on the voltage applied to the element, the voltage being set when the switch is closed. The voltage on the element is substantially maintained during a holding state longer than 70 ms when the switch is open. | 07-15-2010 |
20110187696 | ELECTROWETTING SYSTEM - An electrowetting system including a display device having a plurality of electrowetting elements, including a first electrowetting element and a second electrowetting element, each being configurable in a plurality of different display states; and a display controller for electrical addressing of the plurality of electrowetting elements in order to switch the plurality of electrowetting elements between different display states. The display controller is arranged to address the first electrowetting element twice subsequently, separated by a first addressing interval, and to address the second electrowetting element twice subsequently, separated by a second addressing interval, the second addressing interval being longer than the first addressing interval. The present invention further relates to a display controller, a driver stage and a method of controlling a display device. | 08-04-2011 |
20120256898 | DRIVING AN ELECTROWETTING DISPLAY DEVICE - A method of driving an electrowetting display device that includes a display element having a cavity; a first fluid and a second fluid within the cavity, the first fluid being immiscible with the second fluid; a surface facing the cavity; and a first electrode. The display device includes a control system for applying a voltage to the first electrode to provide a display state in response to a signal level of the voltage, wherein the control system is arranged to configure the signal level throughout a display period such that the second fluid adjoins at least a minimum area of the surface, the minimum area being greater than a zero area. The method includes applying at least one display signal level during the display period, the at least one display signal level configured such that the first fluid and the second fluid adjoin the surface throughout the display period. | 10-11-2012 |
20130106821 | ELECTROWETTING DISPLAY DRIVING SYSTEM | 05-02-2013 |
20140293397 | ELECTROWETTING DEVICE - An electrowetting display device comprising a picture element comprising a first fluid and a second fluid immiscible with the first fluid. At least one wall comprises a first surface and a second surface at different locations on a perimeter of a display area, the first surface being less wettable to the second fluid than the second surface. | 10-02-2014 |
20140300594 | DRIVING OF ELECTROWETTING DISPLAY DEVICE - A method of driving an electrowetting display device including at least one pixel, the method comprising: applying a first pixel voltage to the pixel during a first portion of the display period; and applying a second pixel voltage to the pixel during a second portion of the display period, the first and second pixel voltages corresponding to a display state of the pixel, and the first pixel voltage and the second pixel voltage having different polarities. | 10-09-2014 |
20140313177 | ELECTROWETTING SYSTEM AND METHOD FOR OPERATING - An electrowetting system includes an electrowetting element having a first fluid and a second, immiscible fluid. The configuration of the fluids is dependent on the voltage applied to the element, the voltage being appliable upon closing a switch. With the switch being open, the voltage on the element is substantially maintainable for a period of time which is shorter than or equal to a relaxation time period of the element due to backflow. | 10-23-2014 |
20150084942 | CONTROL METHOD - An electrowetting element includes a first fluid and a second fluid immiscible with the first fluid, as well as a surface, wherein display effects depend on an extent that the first and second fluids adjoin the surface, in dependence on applied voltage. Operation includes receiving data representing a first display effect for display; receiving data representing a subsequent display effect for display after display of the first display effect; comparing data representing the first display effect with data representing said subsequent display effect to determine a difference indicative of a change of the extent the second fluid adjoins the surface between display of the first display effect and display of the subsequent display effect; and depending on said difference, selectively outputting data for driving the electrowetting element to display a different display effect, instead of the subsequent display effect, consecutively after displaying the first display effect. | 03-26-2015 |