| 摘要 |
<p>PURPOSE:To speed up processing by constituting a device so that superposed reading of image data stored in plural image memory to a frame memory can be executed only by one scanning. CONSTITUTION:The reading of picture element data corresponding to plural image memories 11-1N is executed so that picture element data in the image memory having the highest priority order out of the priority order applied to the image memories 11-1N by a priority order applying means 4 and having a flag indicating the picture data to be displayed are successively read out. Thereby, the superposed reading of image data from the plural image memories 11-1N to the frame memory 2 can be executed only by one scanning.</p> |
