The invention provides an electro-optical apparatus that can include a clock-signal terminal and a phase-difference correction circuit that are connected without branching, and the phase-difference correction circuit and one of scanning-line drive circuits are connected without branching. One device includes a medical lead having a shaft. Any thin film prepared from this varnish is substantially from generation of foreign matter, so that it can appropriately be used as thin films for electronic devices and those for use in other technical fields. As another example, the user function is converted into a network of multiplexers and complete LUTs, which are analyzed to determine if an incomplete LUT can implement the function. A fluid tank comprising a bottom wall having an internal surface which is inclined to the horizontal; and an ultrasound guide surface which is located in the interior of the tank and oriented to direct ultrasound substantially vertically. Also disclosed is the shower enclosure so constructed.