Patent ID: 8106876

Claim:
Colour display device comprising, from rear to front towards an observer, a multicolour backlighting unit using organic light-emitting diodes and an electro-optical array for the switching of the backlighting by pixels, the backlighting unit being a surface comprising a periodic pattern of a group of at least three adjacent illuminating lines of different base colours that are parallel to each other, wherein the pixels of the switching array and the illuminating lines of the backlighting unit are substantially aligned in order that any given pixel allows the forward transmission of only the base colour of the illuminating line aligned with this pixel, wherein a cylindrical lens is disposed along each illuminating line on the backlighting unit in order to form a light beam with substantially parallel edges directed towards the front and through the switching array for the corresponding base colour, the lens having a length substantially equal to the length of the illuminating line wherein the organic light-emitting diodes of each illuminating line comprise, towards the front, a transparent or semi-transparent electrode of a first kind through which the light produced passes and, towards the rear, an electrode of a second kind, the kinds of electrodes corresponding to anode and cathode, wherein the electrodes of one of the kinds of the illuminating lines of the same base colour, called line electrodes, are connected together and to at least one pair of colour control connections for the corresponding base colour, the electrodes of the other kind for all of the illuminating lines being connected together, forming a common electrode, and to at least one common control connection, and wherein the first colour control connection of the at least one pair for each base colour is towards a first end of the line electrodes of this base colour and the second connection of the at least one pair is towards a second end of the same line electrodes of this base colour, the second end being opposite to the first end along the illuminating lines, the line electrodes of the same base colour being connected together at each of the two ends of the illuminating lines.