A projection system including an intrinsic polarizer is disclosed. Thus, when a voltage in a range hardly feeding a current to the diode is applied to a non-selected cell in data writing or data reading, substantially no voltage is applied to the ferroelectric capacitor. The encoding synthesizes the chaotic map based upon the data to be transmitted. Communication with the Internet is generally through a proxy server that can deduce these considerations from the palmtop computer’s serial number andor other information specified by user.