The present invention provides a display device and a control method thereof, and a gesture recognition method. The strategy determines the power spectral component within each channel, and dynamically selects or de-selects the channels through which a stimulation pulse is provided as a function of whether the spectral power of the channel is high or low. The fasteners further include integral cooperating alignment pins and receivers for aligning the fasteners and hence the frame halves. In each circuit patterns, there is included a switching element sandwiched between a free-wheel diode and a electrode area. The method defines a service protection platform implemented on mobile terminals having both normal execution environment and secure execution environment. Movement and replacement of collection chamber liners to capture liquid fractions can be manually or robotically controlled.