| 摘要 |
PURPOSE:To quickly correct a picture element block mistakenly displayed by transmitting all picture element blocks of one screen at the time of initial transmission and further transmitting all the picture element blocks of one screen instead of transmitting the changing picture element block at the prescribed timing after the initial transmission. CONSTITUTION:In a transmitting device 1, a comparator circuit 14 compares the picture element blocks of any screen with those of its previous screen. If no change is detected, an output circuit 17 consisting of gate circuits becomes closed to transmit said all picture element blocks to a receiving device 2, which updates all the picture element blocks displayed on a monitor 24 to new picture element blocks. Accordingly, even if the picture element blocks at the time of the initial transmission develop errors, and remain unchanged so far, they can be corrected at this time. Thus whenever the device 1 detects the screen whose picture element block does not change, it transmits the all picture element blocks to the device 2, whereby the troubled picture element blocks can be corrected earlier. |
