| 摘要 |
PURPOSE:To provide an LED display device in which wiring work is simple at the time of extension and wiring material and wiring man-hours are reducible. CONSTITUTION:The device is provided with a first flip-flop circuit FFA which has a first, second, ... n-th LED drive circuits SQ1 to SQN that are mutually connected in series and sequentially arranged in the order of the transmission originator numbers BD1 to BD7 inputted from the transmission line La, forms a shift register being shifted by clock pulses phi1, and are inputted with the data D1 to DN showing the existence or non-existence of lightning data BD8 inputted from the transmission line La in compliance with the order of the transmission originator numbers; a second flip-flop FFB which holds the data outputted from the first flip-flop circuit FFA; and a transistor TR0 which lights the LED1 to LEDN when the second flip-flop circuit FFB has held the data. |
