Patent ID: 7391414

Claim:
A controller that controls an electro-optical device having: a plurality of pixels aligned so as to correspond to each of the intersections of a plurality of scanning lines and a plurality of data lines, and a driving circuit that performs sequential vertical scanning of the selected plurality of scanning lines and applying data voltage to the pixels corresponding to the scanning lines in accordance with display information, the controller comprising: a storage unit that stores a group of parameters including a driving-control parameter that controls the operation of the driving circuit; an input unit that allows a command and a reset signal to be input, the command instructing a change in the group of parameters, the reset signal instructing display to halt; a parameter controller that updates values of the group of parameters stored in the storage unit in accordance with the command when the command is input to the input unit and that initializes the values of the group of parameters stored in the storage unit when the reset signal is input to the input unit; and a driving controller that controls the driving circuit in accordance with the driving-control parameter stored in the storage unit, the driving controller controlling the driving circuit such that turn-off voltage is applied to the plurality of pixels after the parameter controller updates the values of the group of parameters by the input of the reset signal.