A portion of an audio signal is separated into multiple frames from which one or more different features are extracted. The laser projection light may be an AC powered laser projection light or a DC powered battery operated unit, and may also incorporate a UL listed LED light device to that provides an LED light device function in addition to the projection function in case people do not want to see the laser projection light performance and wish to switch off the laser beam. When the accumulated motion vector value reaches a preset threshold value, the digital camera is automatically driven to capture a second image, so as to stitch and blend the first image and the second image into a panoramic image. A droplet detection module detects each droplet as it passes through the second curtain, determines when the source laser should generate a pulse so that the pulse arrives at the irradiation site at the same time as the droplet, and sends a signal to the source laser to fire at the correct time. The at least one active pattern formed by the above method may have a finer size and an improved shaped compared to a conventional active pattern formed by directly patterning layers using a photoresist pattern. In the pyrolysis zone, an organic binder may be added to encapsulate inorganic contaminants such as metals.