Abstract: The disclosure relates to a pixel array for an electrofluidic display element, comprising a plurality of adjacent pixels that form the pixel array, each pixel having a pixel chamber with a polygonal, preferably rectangular, pixel surface and a height. Each pixel has at least one main reservoir channel which opens, via a first width (D) and length (L), into the pixel chamber and a single- or multi-part reservoir channel which surrounds the chamber, borders the pixel surface and opens, along its length and a second width into the pixel chamber. A polar and/or electrically conductive liquid is or can be held in the pixels, said liquid being capable of motion back-and-forth between the reservoir channels and the pixel chamber by the application of an electric field, and the reservoir channels surrounding adjacent pixels run towards each other in a corner region in which the adjacent pixels border one another.

Abstract: The invention concerns an electrically controllable display element (1) for an optical display device, with a structured layer (2) that has a plurality pixels (3), and with at least one electrode layer (6) directly or indirectly over a structured side (2.1) of the structured layer (2), as well as with an active matrix (7) having thin film transistors, which has selectively controllable electrodes, such that individual or multiple particular pixels (3) can be charged with an electric field, characterized by the fact that the at least one electrode layer (6) extends in one piece over the structured side (2.1) of the structured layer (2), and that the active matrix (7) in the viewing direction is arranged on the display element (1) above the electrode layer (6).

Abstract: To produce a display element for an electrowetting display, there is provided a quantity of fluid which is greater than both the first volume of a display chamber and the second volume of a reservoir chamber, but less than the sum of the first volume and second volume. The fluid is divided into first and second partial drops, the first being introduced into the display chamber, the second being introduced into the reservoir chamber. The display and reservoir chambers are brought together so that a first opening in a first intermediate film of the display chamber and a second opening in a second intermediate film of the reservoir chamber at least partly overlap. An electrical field is applied to the display chamber and to the reservoir chamber, thereby uniting the first partial drop and the second partial drop.

Abstract: The invention relates to a fluidic, in particular an electrofluidic display element, comprising at least one pixel chamber (1) which is in fluid communication with at least one reservoir volume (2), wherein an electrically conducting and/or polar liquid (3) can be reciprocated between the pixel chamber (1) and the reservoir volume (2), wherein the pixel chamber (1) has a height (H) and a pixel width (B) and the reservoir volume (2) has a reservoir width (D) and a length (L), characterized in that the width (D) of the reservoir volume (2) is insignificantly greater than or equal to the height (H) of the pixel chamber (1).

Abstract: A device for displaying information comprising at least one display element which includes: a liquid, the surface energy thereof being variable by means of an electric field; a first and a second volume for receiving the liquid, wherein said first and said second volume are defined by a first effective radius or a second effective radius, respectively, a fluidic passage between said first and said second volume, wherein in a first state said liquid substantially occupies said first volume and wherein in a second state said liquid substantially occupies said second volume, is characterized in that said passage is configured such that the fraction of the liquid facing to the unoccupied volume comprises a radius which is smaller than the effective radius of the presently occupied volume.

Abstract: The invention relates to a fluidic, in particular an electrofluidic display element, comprising at least one pixel chamber (1) which is in fluid communication with at least one reservoir volume (2), wherein an electrically conducting and/or polar liquid (3) can be reciprocated between the pixel chamber (1) and the reservoir volume (2), wherein the pixel chamber (1) has a height (H) and a pixel width (B) and the reservoir volume (2) has a reservoir width (D) and a length (L), characterized in that the width (D) of the reservoir volume (2) is insignificantly greater than or equal to the height (H) of the pixel chamber (1).

Abstract: The invention relates to a display, for using liquids to display information and a corresponding method. According to the invention, said display comprises a number of display elements with cavities, at least one display liquid for displaying information and at least one liquid reservoir for providing the at least one display liquid, characterized in that each display element further comprises a dosing device, by means of which display liquid from the liquid reservoir may be dosed into and out of the display element. The dosing device thus permits a precise dosing of defined display liquid volumes into or out of the display element. The method in which said dosing device finds use is used for precisely repeated dosing of defined volumes of display liquid.

Abstract: The invention relates to an apparatus for displaying information by way of at least one fluid. For this purpose, the apparatus comprises at least one display element having two volumes, wherein the first volume is disposed between a transparent cover layer and a non-transparent intermediate layer and the second volume is disposed between the intermediate layer and a final layer such that only the content of the upper volume is visible. The display according to the invention further comprises at least one fluidic transition, by way of which the fluid can be transported between the two volumes. The apparatus according to the invention has an optimized space requirement, solves the problem of uneven saturation over the surface of a display element, and is additionally not sensitive to mechanical interference.

Abstract: A display device uses liquids for visualizing information and comprises a plurality of display elements with cavities, at least one display liquid for displaying information, at least one liquid feeding mechanism for delivering the at least one display liquid, at least one common main duct for jointly filling a plurality of display elements, and at least one liquid reservoir for temporarily holding the at least one display liquid. The at least one liquid feeding mechanism allows display liquid to be delivered from reservoir into said display elements via the common main duct leading into at least two display elements. Each display element has at least one mechanism for influencing the surface energy of the display liquid. In the method of the invention, different feeding processes can be used for holding or delivering the desired liquid into the display elements.

Abstract: This invention describes a method for producing a display element for an electrowetting display with the steps: Provision of a display chamber (10) with a first volume, the bottom of which is formed by a first intermediate film (60) which has a first opening, whereby the display chamber (10) is closed by an at least partly transparent cover (14; 14a, 14b) which is at some distance from the first intermediate film (16); provision of a reservoir chamber (20) for fluid with a second volume, the bottom of which is formed by a substrate and which has a second intermediate film (26) at some distance from it which closes the reservoir chamber (20) and has a second opening; provision of a quantity of fluid which is greater than both the first volume as well as the second volume but is less than the sum of the first volume and second volume; division of the quantity of fluid into a first partial drop (40a) and a second partial drop (40b); introduction of the first partial drop (40a) into the display chamber (10); intr

Abstract: The invention relates to a display apparatus having at least one electronically controllable display element that comprises: at least one nonpolar and at least two electrically conductive or polar liquids; a fluidically sealed volume having a visible sub-volume and at least two holding volumes connected fluidically to the visible sub-volume; and at least one voltage source that is applied to a first electrode arrangement; the visible sub-volume being of planar embodiment so that when the first electrode arrangement is in the zero-voltage state, the electrically conductive or polar liquids are drawn into the respective holding volume; and the display element furthermore comprising mechanical and/or electrical means for selectably retaining in their holding volumes those electrically conductive or polar liquids which are not intended to be moved into the visible sub-volume by an impingement of voltage on the first electrode arrangement.

Abstract: The invention relates to a display device having at least one electrically controllable display element comprising a first and at least one further liquid, a plurality of fluidically closed volumes and at least one voltage source which is connected to an electrode array, wherein said volumes include flat visible subvolumes which stacked upon another along their shortest dimension, having associated second subvolumes which pass through those flat visible subvolumes which are underlying that flat visible subvolume which is associated with the respective second subvolume.

Abstract: Display element with at least one color-generating cell of the first type which has an emissive light source, and with at least one color-generating cell of the second type which has a reflective and/or transmissive and/or transflective light source, whereby each cell of the second type can be driven so that it makes visible one of the chromatic colors red, green, blue, magenta, cyan and yellow and the achromatic colors white and black, to compensate at least partly for the absence of the color impression created by at least one color-generating cell of the first type on account of the ambient light of the display element.

Abstract: The invention relates to a display element for the display of a plurality of a colors and a method for their display. For this purpose, the invention teaches a display element 1 based on one or more color-producing surfaces 2 which can be oriented parallel to the viewing direction 3 of an observer, for example, so that the observer views only the narrow edges of the surfaces 2. The actual content is perceptible only because a movable reflector 4 is also provided in which the color-producing surface 2 is reflected. The display element claimed by the invention has a particularly good aperture. In the case of static images, the power consumption of the display element is very low. In one preferred embodiment, the display element also makes possible the presentation of a large color space and can be independent of the presence of ambient light.

Abstract: The invention relates to a security element including at least one display element for non-resettable visible display of information, wherein said display element comprises a first and a second volume which are fluidically connected via at least one duct, and only one electrically controllable electrode which is associated to one of said volumes and is configured, when charged with an electric voltage, to vary the surface tension of a liquid which is present in said associated volume, wherein said liquid comprises at least an electrically conducting and/or polar and a non-polar fraction, and at least said electrically conducting fraction being completely and in a stable manner provided in that of both volumes which is not associated with an electrode and wherein said electrically conducting and/or polar fraction may be moved irreversibly and at least partly due to a single charging of the electrode into the volume which is associated with an electrode.

Abstract: The invention relates to the use of a fluid mixture for electrowetting in a device that is suitable for this. According to the invention, the fluid mixture consists of at least two components, namely an electrically inducible liquid and an electrically inert fluid. These two components form a bi- or multiphasic mixture. The electrically inducible liquid responds to a change of an electric field that surrounds it or completely or partly permeates it, in such way that it changes its surface tension so that its form is changed too, particularly if only parts of its surface are permeated by the electric field, or if the field strength is distributed not homogenously. According to a particularly preferred embodiment, the electrically inducible liquid consists of propylene carbonate.

Abstract: The invention relates to a display device (1) based on the use of fluids for visualizing information. In order to ensure simple exchangeability of fluids, the invention provides a central fluid reservoir (6) in combination with a fluid display device (1) of any desired design. For this purpose, the central fluid reservoir (6) is coupled to the fluid display elements, which can be refilled with the colored fluid.

Abstract: The invention relates to a display device having at least one electronically controllable display element comprising at least one non-polar and at least two electrically conducting or polar liquids, a fluidically closed volume having a visible subvolume, a further subvolume and at least two storage volumes connected to said subvolumes, as well as a voltage source connected to a first electrode array. It is provided thereby that each of said electrically conducting or polar liquids assumes a volume which is dimensioned such that, independent of application of voltage to the electrode array, always a fluidically tight closure for non-polar liquid between the respective storage volume and either the visible or the further subvolume is formed.

Abstract: An arrangement of electrodes is provided in which there is a plurality of electrodes located in two planes and offset from one another in the direction of movement, and which within each plane are arranged in at least two electrically interconnected and alternating groups. A method is also provided for the movement or transport of drops of liquid utilizing the electrowetting effect and utilizing the above arrangement.

Abstract: The invention relates to an apparatus for displaying information by way of at least one fluid. For this purpose, the apparatus comprises at least one display element having two volumes, wherein the first volume is disposed between a transparent cover layer and a non-transparent intermediate layer and the second volume is disposed between the intermediate layer and a final layer such that only the content of the upper volume is visible. The display according to the invention further comprises at least one fluidic transition, by way of which the fluid can be transported between the two volumes. The apparatus according to the invention has an optimized space requirement, solves the problem of uneven saturation over the surface of a display element, and is additionally not sensitive to mechanical interference.