Display device and display system

A display device comprising a display panel having an array of a plurality of pixels, a first drive circuit for outputting a display signal corresponding to the display data to the pixels, and a second drive circuit for outputting to the pixels a select signal for selecting the pixels to receive the display signal;

• wherein a first display data and a first sync signal indicating the turn of each frame of the first display data are received as an input, and the second display data obtained by converting the first display data through a data conversion circuit according to a predetermined data conversion rule is displayed using a second sync signal indicating the turn of each frame of the second display data;
• wherein the data conversion circuit includes n (n:
• an integer of 2 or more) data conversion rules and a select circuit for selecting one of the n data conversion rules;
• wherein the select circuit selects the n data conversion rules sequentially from the first to nth data conversion rules;
• wherein the data conversion rules are switched in synchronism with the first display data using the first sync signal;
• wherein the select circuit includes a circuit for generating an identification signal for identifying each of the n frames of the first display data to select one of the n data conversion rules;
• and
• wherein the identification signal generating circuit has such a function that a frame turn is detected according to whether the first display data is input in the form of a repetition of a frame having the same contents as the immediately preceding frame or in the form of a frame having different contents from the immediately preceding frame, and in the case where the same frame is input repetitively, the identification signal is updated sequentially in synchronism with the first sync signal, while in the case where the frame is changed, the identification signal is reset.

A display device comprising a display panel with a plurality of pixels in array, a conversion circuit for converting the display data, a first drive circuit for outputting a display signal corresponding to the display data after conversion to the pixels, and a second drive circuit for outputting to the pixels a select signal for selecting the pixels to receive the display signal;

• wherein a first display data and a first sync signal indicating the turn of each frame of the first display data are received as an input, and the second display data is displayed using a second display data obtained by converting the first display data through a data conversion circuit according to a predetermined data conversion rule and a second sync signal indicating the turn of each frame of the second display data;
• wherein one frame period is divided into n (n:
• integer of 2 or more) field periods;
• wherein the conversion circuit inputs the display data for one frame multiplied by n along the time axis to each field period in the one frame period and converts the input display data into selected one of a bright field data brighter than the display data and a dark field data darker than the display data in accordance with the field period;
• the display device further comprising a circuit for generating a field identification signal for determining the number of the field periods before and including the field period involved in the one frame period, based on the frame sync signal synchronized with the one frame period of the display data before being multiplied by n and the field sync signal synchronized with the field period of the display data after being multiplied by n;
• wherein the field generating circuit identifies the first field sync signal after the frame sync signal as the first field period, and thereafter identifies up to the nth field periods in accordance with the field sync signal;
• the display device further comprising a signal generating circuit that generates the identification signal using the first sync signal, the first display data and a third sync signal input separately from the first sync signal;
• and
• wherein the conversion circuit determines whether the display data is to be converted to the bright field data or the dark field data in accordance with the field sync signal.