| 摘要 |
PURPOSE:To simplify constitution of respectively disposing plural faces to one of a Z memory and a display memory and respectively sequence controlling in one control circuit. CONSTITUTION:The plural display memories 3 for storing the display data of X, Y coordinates and the Z memories 2 for storing the Z value of a small value at the time of approaching to a visually observing direction correspondingly to the coordinates are respectively disposed. Respective control circuits 4, 5 are shared to be one. The control circuits 4, 5 compare a new Z value corresponding to the same display data of the display memory 3 with an old Z value in the plotted Z memory 2 to update the Z value in the Z memory 2 according to a scale. |
