To variably change the filter characteristic of a decimation filter in accordance with a sampling rate. The invention also relates to a printer adapted to the use of this method. Next, a distraction level is estimated. Each spectral band is detected by a separate photo detector and amplified. Content about the project may be provided to the user based on the identification code. An electro-conductive polarizer is formed on the second substrate of the IPS-LCD panel, and a ground electrode surrounds the electro-conductive polarizer.