Patent ID: 6014119
Filing Date: 2000-01-11
Classification: G09G,H01L,H05B

Abstract:
An electroluminescent device comprising an active layer of a semiconducting polymer, said layer being present between a first and a second pattern of orthogonal electrodes, at least one of the two patterns being transparent to the light to be emitted and the first pattern comprising a material which is suitable for injecting holes in the active layer, characterized in that at areas of overlap of the electrode patterns, the electrode patterns, together with the intermediate polymer, form parts of pixels, and the device comprises a drive circuit which, in operation, gives the first pattern a zero voltage or a negative voltage with respect to the second pattern at the location of nonselected pixels, and gives the first pattern a positive voltage of at least 1.6 V with respect to the second pattern at the location of selected pixels, wherein the positive voltage is smaller than 20 V, and wherein the first and the second patterns comprise strip-shaped selection and data electrodes, and, during selection, the drive circuit supplies the selection electrodes with selection pulses having a pulse width of at least 5 microseconds.