Kristiaan
Kristiaan Neyts, Gent BE
Patent application number | Description | Published |
---|---|---|
20100218889 | Lateral Ion Pumping in Liquid Crystal Displays - The present invention relates to the removal of ion contaminations from liquid crystal layers in liquid crystal display devices. The ions are removed by means of so called ion pumping, which utilizes the anisotropic viscosity of liquid crystals. The ions are pumped up and down in the liquid crystal layer by means of an alternating electric filed. The alternating electric field simultaneously alters the alignment of directors in the liquid crystal. The viscosity in the liquid crystal is related to the director directions, and the ions are thereby moved in non-closed trajectories. The inventive ion pumping can be further improved using an asymmetric or biased alternating electric field. | 09-02-2010 |
20110036719 | DETERMINATION OF PARTICLE PROPERTIES - The present invention relates to a method and system for determining particle properties. Such properties may for example be charge, size, drift, etc. The method comprises determining ( | 02-17-2011 |
20120293797 | METHODS AND SYSTEMS FOR OPTICAL CHARACTERISATION - An optical device is described for irradiating at least one object in a medium. The optical device may be a microfluidics device, and comprises at least one integrated planar waveguide that enables providing sheet irradiation of objects in the medium. A characterization system including such an optical device and a corresponding method of characterizing an object or a fluid are described. | 11-22-2012 |
20140132893 | Methods and Systems for Trimming Photonic Devices - A method for trimming at least one photonic device, and comprising obtaining one or more photonic devices including at least one component for supporting propagation of electromagnetic radiation and a covering layer comprising a polymerisable liquid crystal. The method further comprises determining, for a selected photonic device selected from the one or more photonic devices, a selected liquid crystal orienting condition to be applied to the polymerisable liquid crystal resulting in a preferred value for an electromagnetic property of the selected photonic device. The method also comprises, while applying the selected liquid crystal orienting condition, polymerizing the polymerisable liquid crystal cladding layer of the selected photonic device, thus obtaining a polymerized liquid crystal on the selected photonic device. | 05-15-2014 |
Kristiaan Schreve, Stellenbosch ZA
Patent application number | Description | Published |
---|---|---|
20120069965 | METHOD FOR POSITIONING AN INSTRUMENT - A method of positioning a surgical instrument is provided which includes mapping a volume adjacent an operating table by taking mapping images from two orientations of a calibration object which includes a 3-dimensional array of radio opaque markers in a known configuration. A patient is positioned on the operating table with a patient target area within a mapped volume, and an instrument holder carrying a known configuration of radio opaque markers positioned adjacent the target area. Further fluoroscopic target images of the target area and instrument holder are obtained from the two orientations and the target area then reconstructed in 3-dimensions by comparing the target images to the mapping images. An instrument holder orientation is then calculated from the reconstruction. | 03-22-2012 |
Kristiaan Vanrossen, Bierbeek BE
Patent application number | Description | Published |
---|---|---|
20130100275 | APPARATUS AND METHOD TO ESTIMATE THE POTENTIAL EFFICIENCY OF A POLYCRYSTALLINE SOLAR CELL - A method for estimating the efficiency of a solar cell to be manufactured from a wafer is disclosed, wherein the efficiency estimate is obtained from a density of crystallite boundaries on a surface of the wafer. In embodiments the density of crystallite boundaries is obtained from a digital image of the surface of the wafer, from which first a filtered image, and then a binary image is generated. The binary image is evaluated to obtain the density of crystallite boundaries. Alternatively, the efficiency estimate is obtained from the sizes of crystallites on the surface of the wafer. An apparatus for obtaining the efficiency estimate is also disclosed. | 04-25-2013 |
Kristiaan Van Rossen, Bierbeek BE
Patent application number | Description | Published |
---|---|---|
20120262566 | APPARATUS FOR ILLUMINATING SUBSTRATES IN ORDER TO IMAGE MICRO CRACKS, PINHOLES AND INCLUSIONS IN MONOCRYSTALLINE AND POLYCRYSTALLINE SUBSTRATES AND METHOD THEREFORE - Apparatus for illuminating monocrystalline and polycrystalline substrates ( | 10-18-2012 |
20130035881 | METHOD AND SYSTEM FOR CHARACTERIZING EFFICIENCY IMPACT OF INTERRUPTION DEFECTS IN PHOTOVOLTAIC CELLS - A system for characterizing interruption defect induced efficiency loss in a photovoltaic cell includes an inspection system configured to acquire inspection data from a photovoltaic cell, a control system configured to: receive the inspection data acquired from the photovoltaic cell, identify one or more interruption defects in one or more fingers of an electrode of the one photovoltaic cell utilizing the inspection data, determine a spatial parameter associated with at least one of the identified interruption defects and one or more floating finger portions of the one or more fingers created by two or more identified interruption defects, determine an interruption-defect-induced efficiency loss of the photovoltaic cell based on the determined spatial parameter associated with the at least one of the identified interruption defects and the floating finger portions of the one or more fingers created by two or more identified interruption defects. | 02-07-2013 |