| 摘要 |
PURPOSE:To display data having a higher priority level in a higher position by storing image data together with priority level data when the image data are displayed while overlapping. CONSTITUTION:Respective bits of image data A and B are stored in frame memories 3-1 and 3-2, and priority levels of image data A and B are held in a register 2. In case of overlap display, data in frame memories 3-1, 3-2, 3-n and priority level data from the register are inputted to an identification circuit 4. If the priority level of the image data B is higher than that of picture data A, the identification circuit 4 identifies this relation to display the image data B preferenty on image data A. |
