The present invention discloses an eyeglass nose bridge structure having an included angle between its two nose pads that is able to fit in with any eyeglass nose bridge openings of different specifications, so that the eyeglass nose bridge structure can be used universally for lenses or glasses of different specifications. Each pixel comprises at least one layer of organic light emitting material 46, and an transparent electrode 48 in contact with the organic layer on a side thereof remote from the substrate, the electrode comprising an electrically conducting polymer 50. A hole is formed in the first interlayer insulating film. The memory device can be programmed by a double-side-bias multi-level-cell program method either with a variable DSB voltage or with a variable gate bias voltage Vg. Thereby, the sintered powders does not need to be attached to the inner wall of the pipe member so that an axial bar is no more need.