| 摘要 |
PURPOSE:To simplify and miniaturize a control circuit and to easily deal with a display with arbitrary magnification and position by freely rewriting the contents of a look-up table according to instructed enlargement ratio and position CONSTITUTION:When display magnification information 1 and display position information 2 are inputted to a look-up table control circuit 3, a corresponding relation between a write address on a frame memory 14 and a read address on an image memory 9 is prepared based on these pieces of information, and it is written to look-up tables 5 and 6. Thereafter, an address given from a data transfer control circuit 11 is address-converted by the look-up tables 5 and 6, data are red from the image memory 9, and only by transmitting the data to the frame memory 14, the display image of the magnification and position is stored. Thus, the control circuit can be easily composed, and moreover, since the contents of the look-up tables 5 and 6 can be freely rewritable by the look-up table control circuit 3, the display by designating the arbitrary magnification and position can be executed. |
