A control driver for a liquid crystal display panel includes: an operation circuit, an LUT, and a linear interpolation DA converter. In certain implementations, an IC includes an impedance sensing circuit and at least one pin used for digital configuration. In one disclosed embodiment, the elastic component forms an integral part with one of the bearing and the shaft. The baffle rails, which may serve as an accent of patterning, are provided without marring the beautifully designed appearance of the mirror body. Electrical power may be delivered by one or more power supply units of either an external or an on-board type, and by using either inductive or conductive coupling. The tube 10 has a double layered structure which is composed by unifying an inner tube 11 which is made of tetrafluoroethylene and an outer tube 12 which is made of teflon by adhesives.