LIQUID CRYSTAL DISPLAY DEVICE, CONTROL METHOD THEREOF, AND MOBILE TERMINAL

摘要

A liquid crystal display device and its control method capable of reducing the entire system size and cost, starting display of an image without disorder when power is turned ON and erasing the display without a residual image when power is turned OFF. A mobile terminal using the liquid crystal display device as a screen display unit is also disclosed. On a glass substrate (11) of the display unit (12), there are provided a horizontal driver (16) and a vertical driver (17) as well as peripheral drive circuits such as an interface circuit (13), a timing generator (14), a reference voltage driver (15), a CS driver (18), a VCOM driver (19), and a potential setting circuit (20). When a display reset control pulse PCI is supplied from outside, a predetermined potential is written to pixels and simultaneously with this, the CS potential and the VCOM potential are set to the same potential as the pixel potential. The same potential is supplied to an opposing electrode, so that white display is performed in the normally white type and black display is performed in the normally black type, thereby preventing image disorder when power is turned ON and OFF.