In a display device using a time gradation method, electric power consumption at a time when high-level gradation display is unnecessary is reduced. Writing of a digital video signal of a lower order bit into a memory is eliminated by a memory controller of a signal control circuit in a display device,...http://www.google.de/patents/US20040095364?utm_source=gb-gplus-sharePatent US20040095364 - Display device and driving method of the same