| 摘要 |
PURPOSE:To delete the number of wirings for driving many light emitting elements by transmitting the driving data of the element at separated portion as 3 signals, and inputting the data synchronously by a circuit mounted on an operation panel to drive the elements. CONSTITUTION:Light emitting element driving signals 101A 101N for designating the ON or OFF of light emitting elements are input to AND gates 12A-12N which input the output pulse of a ring counter 11 according to a clock signal 102, and the signals are output when the output pulse of the counter 11 exists to become drive signals 100 through an OR gate 13 to be fed to a receiver 2. A preset signal 103 is simultaneously applied to a transmitter 1 and the receiver 2 to set the value of the counter to the same, and synchronized by applying the same clock signal thereto. The receiver 2 inputs the signal 100 synchronously with the signals 101A-101N input to the transmitter 1. |
