A liquid crystal display device that includes a first substrate, a second substrate, and a liquid crystal material sandwiched between the first and second substrates. The system identifies the end-user who has downloaded software applications andor data to a wireless device and collects end-user opinion preferably through the transmission of a targeted questionnaire to the wireless device. Therefore, if such second digital component signal S3 is output to the external unit through the transmitting line, the problem of occupying the transmitting line can be avoided without changing the angle of view and the color resolution.