A semiconductor apparatus is provided herein for reducing power when transmitting data between a first device and a second device in the semiconductor apparatus. A sensor measures the marking band. For example, foam may be generated by means of a nozzle having a first inlet for a foaming liquid and a second inlet for supplying pressurized air to the nozzle so as to mix air with said liquid, thereby creating foam. The moveable assembly may provide at least three degrees of freedom of movement for the flat panel display device.