Abstract:
A method is described for fabricating an organic light emitting device, which method comprises steps of providing a planar substrate, constructing a plurality of first electrodes on the substrate surface, constructing a set of walls in between the plurality of first electrodes, constructing a layer of organic light emitting material overlying the first electrodes, constructing a second electrode layer overlying the light emitting layer, and removing a portion of the walls that extends away from the planar substrate above the second electrode. Also described are organic light emitting devices fabricated according to the method.
Abstract:
An active matrix display device is disclosed. The display includes individual driver circuits for each pixel (100) to provide accurate, high resolution gray scale rendering and an almost 100 % duty cycle. The pixel circuit drivers (Figures 1(10), 2(20), 3(30), 4(40), 5(50), 6(60), 7(70) and 8(80)) minimize factors known to limit gray scale resolution, such as variations in threshold voltage, voltage drops in connecting lines and from leakage currents, and large peak currents. The present invention includes a line driver functioning initially as a low impedance voltage driver (Figure 6(60)), then converting to a high impedance current driver (Figure 6(60)). A method of driving a pixel (100) with sufficient circuitry to substain the pixel's light output at a gray level determined by the input data fed to the pixel (100) is also disclosed. The display is capable of processing both digital and anolog input data.