Abstract: A method of operating an electro-optic display apparatus, wherein the display apparatus includes a display device having image regions and a display driving system having a data input for selecting image regions. The data input is connected to the input of a distributor for providing signals for driving the image regions. Each image region has an active display state in which the image region is driven with an active voltage signal. The active voltage signal includes a first signal level which sets an image region to the active display state and a second signal level different from said first signal level and which is applied for a shorter duration than said first signal level.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a driver circuit arrangement (1?) for driving a plurality of individually switchable electrical subsystems (A?, B?, C?), such as (arrangements of) LEDs (9-A, 9-B, 9-C). Each subsystem has at least one energy storage device (10-A, 10-B, 10-C), such that when the subsystem is disconnected from the main source (7) of electrical energy, the energy storage device can supply energy to the device(s) of the subsystem. By furthermore providing at least one subswitch (13-A, 13-B, 13-C) in the subsystem, between the energy storage device and an electrical device of the subsystem, control over the device is still possible when the subsystem is disconnected form the main source of electrical energy.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method of operating an electro-optic display apparatus, wherein the display apparatus includes a display device having image regions and a display driving system having a data input for selecting image regions. The data input is connected to the input of a distributor for providing signals for driving the image regions. Each image region has an active display state in which the image region is driven with an active voltage signal. The active voltage signal includes a first signal level which sets an image region to the active display state and a second signal level different from said first signal level and which is applied for a shorter duration than said first signal level.

Abstract: A voltage converter comprises an inductive circuit (L) for storing energy during an inductive magnetizing mode and transferring energy during an inductive demagnetizing mode. In addition the voltage converter comprises at least two non-inverting branches (12, 13, 14) for providing at least two non-inverted output voltages (Va, Vb, Vc) and an inverting branch (15) for providing an inverted output voltage. The inverting (15) and non-inverting (12, 13, 14) branches being parallely coupled to an output (10) of the inductive circuit (L). The inductive circuit being arranged to transfer energy to the inverting branch (15) and to one of the at least two non-inverting branches (12, 13, 14). Through this, the inverted voltage (Vinv) and the corresponding non-inverted output voltage (Va, Vb, Vc) of the one of the at least two non-inverting branches (12, 13, 14) are having an opposite polarity and a substantially equal magnitude.

Abstract: The invention relates to a driver circuit arrangement (1?) for driving a plurality of individually switchable electrical subsystems (A?, B?, C?), such as (arrangements of) LEDs (9-A, 9-B, 9-C). Each subsystem has at least one energy storage device (10-A, 10-B, 10-C), such that when the subsystem is disconnected from the main source (7) of electrical energy, the energy storage device can supply energy to the device(s) of the subsystem. By furthermore providing at least one subswitch (13-A, 13-B, 13-C) in the subsystem, between the energy storage device and an electrical device of the subsystem, control over the device is still possible when the subsystem is disconnected form the main source of electrical energy.