A collapsible easel with three legs is provided. Windows are defined in training elements associated with data locations in the training regions. Since the driving capacitor that has been formed on the FPC substrate in the prior art is formed in a peripheral area of the thin film transistor array panel, the FPC can be formed as one layer and a size of the FPC can be substantially reduced and thereby a slim and small-sized liquid crystal display can be produced. The composition of the above phosphor is represented by chemical formula:. The system includes a wireless modem utilizing the GSM cellular phone network, a central processing unit, connection of a scientific instrument to the central processing unit, power supply, and an enclosure for housing the components.