A light-emitting polymer composition for a light-emitting layer in an organic EL display device includes at least first and second light-emitting polymers having different interfacial characteristics which lower a cohesion between elements of the first and second light-emitting polymers. The second signal is a frequency domain representation of at least a portion of the first signal. An external alignment system is incorporated into the cross-connect switch and is employed to provide an alignment beam of a wavelength different from the signal beams. The half pel interpolation unit can operate independent of the motion vector. The bearing unit, in turn, comprises a bearing body that is in contact with the foot plate and with the supporting element, a first bearing element that pivotably connects the foot plate to the bearing body, and a second bearing element that pivotably connects the bearing body to the supporting element.