Display device including apparatus for rotating the image to be displayed

A display device comprising:

• a plurality of memory chips arranged in rows and columns to form a matrix array of the memory chips, each of said memory chips having a plurality of randomly accessible addresses arranged in rows and columns;
• means for supplying partial picture information to said memory chips for storing the same therein;
• means for generating a picture display angle designating signal selectively representing four angles of rotation 0.degree., 90.degree., 180.degree. and 270.degree. at which angle said partial picture information is to be stored in said memory chips;
• means for supplying, in succession, write enable signals of said partial picture information to said memory chips in accordance with a rotation angle represented by said picture display angle designating signal;
• means for designating said randomly accessible addresses of said memory chips in row and column directions wherein all the addresses of memory chips included in rows and columns are simultaneously designated;
• means for supplying to said address designation means in row and column directions a first address designation signal in a horizontal direction of said partial picture information and a second address designation signal in a vertical direction of said partial picture information in accordance with said picture display angle designating signal representing a rotation angle;
• and
• a display unit for displaying a partial picture information at said rotation angle, the partial picture information being stored in said memory chips at a rotation angle corresponding to said picture display angle designating signal.