| 摘要 |
PROBLEM TO BE SOLVED: To suppress brightness fluctuation or a flicker in the lighting of an elevator hall button when a dot matrix LED is used as a display part of elevator hall equipment.SOLUTION: An elevator hall device (10) is individually provided on each elevator hall floor, receives a power supply voltage from a commonly provided power supply device (2), and controls the display of information common to all floors on an LED indicator for each elevator hall floor based on an indicator code from a commonly provided control board (1). The elevator hall device has a display control unit (11) which controls a lighting pulse width for lighting an elevator hall button based on a voltage drop predictive value calculated according to the number of LEDs lit on each line when a dot matrix LED configuring the LED indicator is lit at a constant frequency in units of lines based on the indicator code. |
