Display driver circuit, electro-optical device, and display drive method

A display driver circuit which drives a plurality of signal electrodes in a display panel which also has a plurality of scan electrodes intersecting the signal electrodes by multi-line selection in which m lines (m is an integer equal to two or more) are simultaneously selected, the display driver circuit comprising:

• a RAM which stores display data for driving the display panel, the display data for n lines (n is a natural number) being read out at a time from the RAM, n being less than m;
• first to q-th latch circuits (q is a natural number, 2n≦q, and m<q) which retain the display data for q lines read from the RAM;
• a selector circuit which selects the display data for consecutive m lines from among the display data retained in the first to q-th latch circuits and outputs the selected display data, based on a given select control signal;
• and
• a signal electrode driver circuit which drives the signal electrode by using given operation results based on the display data for m lines selectively output from the selector circuit.

A display drive method which drives a plurality of signal electrodes in a display panel which also has a plurality of scan electrodes intersecting the signal electrodes by multi-line selection in which three lines are simultaneously selected, the display drive method comprising:

• reading out display data for two lines from a RAM which stores the display data used for driving the display panel;
• retaining the display data read from the RAM;
• selecting the display data for consecutive first to third lines from among the retained display data for the first to fourth lines and then outputting the selected display data, based on a given select control signal in a first period;
• retaining display data for fifth and sixth lines following the fourth line, before selecting the display data for the fourth to sixth lines and outputting the selected display data, based on the select control signal in a second period following the first period;
• and
• driving the signal electrode by using given operation results based on the selectively output display data for consecutive three lines.

A display drive method which drives a plurality of signal electrodes in a display panel which also has a plurality of scan electrodes intersecting the signal electrodes multi-line drive selection in which m lines (m is an integer equal to two or more) are simultaneously selected, the display drive method comprising:

• reading out display data for n lines (n is a natural number less than m) from a RAM which stores the display data used for driving the display panel;
• retaining the display data read from the RAM;
• selecting the display data for consecutive m lines from among the retained display data for q lines (q is a natural number, and 2n≦q, and m<q) and outputting the selected display data, based on a given select control signal;
• and
• driving the signal electrodes by using given operation results based on the selectively output display data for m lines.