Abstract: A method for operating a display system for smartglasses in a motor vehicle includes ascertaining a spatial image representation of a rear vehicle environment with the aid of an environment capture device includes a camera system for providing a camera image representation and a 3D capture device for providing a distance profile; communicating at least one portion of the spatial image representation of the rear vehicle environment as object information to the smartglasses; and performing contact-analog presentation of display images on a display surface of the smartglasses in a presentation region at a vehicle-fixed position, which region corresponds to a vehicle mirror position, wherein the display images are created stereoscopically depending on the spatial image representation of the rear vehicle environment with the aid of a graphics engine implemented in the smartglasses in order to enable a spatial presentation of environment objects of the rear vehicle environment.

Abstract: A display system is operated with an assistance system tied to the vehicle and data glasses in a vehicle. It is monitored whether a presentation surface has been brought from a stowed position into a position of use in which the presentation surface faces the data glasses. The presentation surface is a dark or black unstructured surface. If it is recognized that the presentation surface has been brought into the position of use, start information from the assistance system is transmitted to the data glasses. Media information in the data glasses is automatically started and displayed depending on the start information.

Abstract: A method assigns an absolute glasses pose indication acquired outside the glasses to one of multiple data glasses in a vehicle.

Abstract: A method for operating smart glasses for the augmented presentation of information objects on a display surface on the basis of a smart glasses pose in a vehicle interior is provided. The smart glasses pose is ascertained by inside-out tracking on at least one marker provided fixedly in a vehicle interior or at least one object provided in the vehicle interior. The at least one marker or the at least one object can be located by a computer-assisted pattern recognition method which is applied to a camera image of a smart glasses camera so that the smart glasses pose relative to the vehicle interior can be determined on the basis of a position, size and/or orientation of the at least one marker or of the at least one object. Only the camera image outside of a masking region is taken into account for the pattern recognition method.

Abstract: An ink jet writing head includes a pressurized ink chamber provide with at least one ink nozzle that is closed by a mobile valve body. A piezoelectric valve actuating device that is electrically connected to a control device drives the valve body with reciprocating motions. The valve body is held by a closing spring in the closing position thereof and is connected to a connecting rod in a driving manner. At least one curved spring strip engages with the end of the connecting rod, located at a distance from the valve, the spring strip being supported on the valve-side end thereof, opposite the ink chamber. The connecting rod is subjected to the tractional prestress of a tension spring. At least one piezoelctric element is applied to the spring strip, the piezoelectric element being controlled by the control device in such a way as to perform tractile movements.

Abstract: The invention relates to an ink jet writing head comprising a pressurised ink chamber (2) provided with at least one ink nozzle that is closed by a mobile valve body (6). A piezoelectric valve actuating device (9) that is electrically connected to a control device (18) drives the valve body (6) with reciprocating motions. The valve body (6) is held by a closing spring (7) in the closing position thereof and is connected to a connecting rod (8) in a driving manner. At least one curved spring strip (14) engages with the end of the connecting rod (8), located at a distance from the valve, said spring strip being supported on the valve-side end thereof, opposite the ink chamber (2). The connecting rod (8) is subjected to the tractional prestress of a tension spring (7, 23). At least one piezoelectric element (17) is applied to the spring strip (14), said piezoelectric element being controlled by the control device (18) in such a way as to perform tractile movements.

Abstract: The invention relates to an ink jet write head which comprises a pressurized ink compartment (2), at least one ink nozzle (5), obturated by a movable valve body (6), and a piezoelectric valve actuation element (10). Said element drives the valve body (6) to perform lifting movements and is electrically connected to a control device (16). A piezoelectric element (14, 15) is applied to both sides of a bending strip (11) which is linked with the valve body (16) in a driven manner. The piezoelectric elements are especially planar and can be electrically controlled by the control device (16) independently of each other. The bending strip (11) consists of a spring steel sheet and is bent to such an extent that a strip limb (11a) at the valve end extends at an angle to the stroke direction of the valve body (6) and that a longitudinal section (11b) of the bending strip (11) is bent relative thereto.

Abstract: An ink chamber (2) connected to an ink pressure source is arranged in an ink jet printing head (1). Several closure elements (7), each of which closes an ink jet nozzle (5), are arranged in the ink chamber (2). Each closure element (7) is connected to a drive device via a tie rod (8). Each tie rod (8) moves out of the ink chamber (2) through an actuating opening (9). A tie rod seal arranged at each actuating opening (9) consists of a slim, conical frustrum-shaped sealing sleeve (12) which can be elastically deformed in the axial direction, the wider end of which is sealingly connected to the edge of the actuating opening (9) and the narrower end of which sealingly surrounds the tie rod (8). When the tie rod (8) moves axially, the sealing sleeve (12) is only deformed axially.

Abstract: Test carrier analysis device for determining the reflectivity of a test field surface (measurement surface). An optical unit (2) of the device contains several light transmitters (6, 7) and a measurement receiver, and the light transmitters are directed obliquely from above onto the measurement surface. Improved accuracy without additional outlay is achieved by the fact that the light transmitters (6, 7) in the optical unit (2) are arranged opposite one another with off-set planes of incidence (28, 29).

Abstract: Test carrier analysis system consisting of test carriers and an associated evaluation apparatus.The evaluation apparatus has a positioning device (5) for the exact positioning of a test carrier (1). A fixing element engaging with a recess (8) of the test carrier (1) is used for this purpose.

Abstract: According to a second aspect, the present invention also provides an apparatus for the evaluation of a flat test carrier for the analytical determination of components of a body fluid, said apparatus having a measurement unit and a positioning means, by means of which the test carrier is positioned and firmly held in a measurement position in such a manner that its test field is present in a definite position with regard to the measurement unit, wherein, for the evaluation of test carriers with a covering layer fixed in the manner of a flap on one edge of the test carrier, there is present a shutter element with a contact surface for pressing on the covering layer, the aperture element and/or the positioning means being mounted and operable in such a manner that the contact surface in the last phase of approaching the covering layer makes, relative to the test carrier, a tilting movement about a tilting axis which lies in close proximity to a fixing edge of the covering layer.

Abstract: According to a first aspect, the present invention provides an apparatus for the evaluation of a longitudinally extending, flexible test carrier for the analytical determination of components of a body fluid. The test carrier has an insertion end to be inserted into the apparatus and a handling end. The test carrier is positioned and securely held in a measurement position in such a manner that its test field is present in a definite position with regard to the measurement unit. The positioning element includes at least two holding elements, one of which firmly holds the test carrier close to its insertion end and the other of which firmly holds the test carrier close to its handling end. A supporting surface being provided on which the test carrier lies at least partly in its measurement position.

Abstract: The present invention provides a device for the evaluation of a flat test carrier for the analytical determination of components of body fluids, said device having a tempering device and a regulating unit, the tempering device including a heating and measurement unit which can be pressed flatly against the test carrier in the region of its reference surface utilized for the evaluation and having a heating surface, wherein the heating and measurement unit has a heating surface which can be homogeneously heated with at least one resistance heating element, at least one resistance heating element is associated at least partly in close proximity to the heating surface, at least one part, serving as temperature measurement section, of the part of the resistance heating element arranged in the neighborhood of the heating surface consisting of a material with a temperature-dependent electrical resistance and the electrical resistance of the temperature measurement section is used for the regulation of the temperatur