Abstract: A method for color shade matching obtains a 3D tooth surface representation using an intraoral scanner wherein the 3D tooth surface representation comprises surface data and a spatially resolved angular distribution of color vectors, wherein the spatially resolved angular distribution of color vectors associates one or more point positions from the surface data to the corresponding angular distribution of color vectors. The method identifies one or more shade values, where each shade value is associated with one angular distribution of color vectors from the spatially resolved angular distribution of color vectors, by comparing the angular distribution of color vectors to a set of reference angular distributions of color vectors, wherein each reference angular distribution in the set is associated with a corresponding shade value. The method displays, stores, or transmits the surface data with an indication of the one or more shade values.

Abstract: A passive-matrix pixel light emitting display structure and a method of making same. The display structure includes display area formed on a substrate. A set of busses is provided over the substrate that extends from an edge of the substrates across a predetermined portion of the substrate. An insulating layer is provided over the busses so that only the electrode pad and the end adjacent the edge of the bus is exposed. At least three sets of first electrode segments are located over the entire display area, each set of first electrode segments extending for only a portion of the length of the substrate and each of the first electrode segments designed to be active in a different portion of the display area. One or more layers of materials wherein at least one of which comprises light-emissive materials, is located over the first electrode segments.