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 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: 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 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 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: 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 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: 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: 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 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.