A compact and inexpensive LCD is provided by improving a drive method for compensating a crosstalk using a compensating pulse added to a signal voltage so that a drive IC and a periphery of the LCD panel are reduced in size. The chip package structure essentially comprises a carrier, one or more chips, a heat sink and an encapsulating material layer. A grinding device for grinding the knife is provided. The shell extends between a mating end and a cable end. The second foot frame is provided with a fixing bolt at its two sides respectively able to insert coordinately into the joint member. A washer is inserted between the head of the screw and the rod.