Patent ID: 7638941

Claim:
A solid-state illumination system for illuminating an area with white light comprising: a plurality of OLED devices, each OLED device formed on a separate substrate having a light-emitting area and each OLED device emitting light at a plurality of angles relative to the substrate in the light-emitting area, said emitted light having different ranges of frequencies at different ranges of the plurality of angles, wherein each different range of frequencies corresponds to a single, different color emitted at each of the different ranges of angles over the substrate light-emitting area; with each OLED device including a first electrode formed over the substrate and a second electrode that in each OLED has a single, fixed distance from the first electrode over the substrate light-emitting area with at least one of the first electrode and second electrode having a surface that is at least partially reflective and having at least one layer of an unpatterned, common light emitting organic material formed between the first electrode and second electrode, said at least one light emitting organic material layer emitting light at a plurality of angles relative to the normal of at least one layer of organic material; wherein the electrodes and the at least one layer of organic material are formed so that the distance that emitted light travels from the light emitting layer to the at least one partially reflective surface varies depending on the angle of emission so that the frequency of light emitted from the OLED device substrate light-emitting area to an illuminated surface depends upon the emission angle; and a support positioning the plurality of OLED devices at a plurality of orientations relative to an area of illumination, said positioning being defined so that any illuminated point within the area of illumination will receive a substantially common broadband combination of light selected to form white light from more than one of the plurality of OLED devices.