Abstract: Disclosed are a system and a method of locking/unlocking using mobile communication terminals. The system comprises: a mobile communication terminal comprising a locking/unlocking key block for displaying multi-media message, pre-stored in the mobile communication terminal or received from other mobile communication terminal, as a locking/unlocking key; and a locking apparatus comprising a locking/unlocking control block for sensing the multi-media message displayed by the mobile communication terminal, determining whether the sensed multi-media message is coincident with multi-media message preset in the locking apparatus or not and, thus, controlling the locking apparatus. Accordingly, it is possible to open a door lock only with the mobile communication terminal, and to copy and transmit the key of the door lock to other users anywhere at any time. In addition, it is inexpensive to copy and transmit the key of the door lock.

Abstract: Multi-domain liquid crystal display: including a first substrates and a second substrate, a liquid crystal layer between the first and second substrates, a plurality of gatelines and datalines on the first substrate crossed each other at fixed intervals, a pixel electrode in each of pixel regions formed between the gatelines and the datalines, a supplementary electrode around each of the pixel electrodes in the same layer with the pixel electrodes, at least one field induction window in each of the pixel regions, and an optical orientation film formed at least one of the first and second substrates.