Patent ID: 7277105

Claim:
A matrix panel drive control apparatus comprising: a row selection circuit for selecting at least one row from among a plurality of rows of the matrix panel during a selection period; a column drive circuit for supplying a modulation signal based on pixel data to a plurality of columns of the matrix panel in synchronization with the selection period; a clock signal supplying circuit for supplying a reference clock signal for controlling at least a pulse width of the modulation signal to the column drive circuit; and a control circuit for setting, for each selected row, a length of the selection period and a cycle of the reference clock signal on the basis of the pixel data of that row, the setting making it possible to satisfy both of the following conditions: (a) a cycle of the reference clock signal for the first row is longer than a cycle of the reference clock signal for the second row and (b) the selection period of the first row is longer than a selection period of the second row.