| 摘要 |
A rotating display element is provided with a display surface structure which has a plurality of display surfaces and is mounted on a rotor of a permanent magnet type stepping motor mechanism in a manner to incorporate therein the stepping motor mechanism. The display surfaces of the display surface structure are disposed side by side around the axis of the rotor. The rotor is provided with a double-pole permanent magnet member having north and south magnetic poles spaced apart a 180 DEG angular distance around the axis of the rotor. A stator of the stepping motor mechanism is provided with a first magnetic member having first and second magnetic poles disposed at 180 DEG intervals around the axis of the rotor, a second magnetic member having third and fourth magnetic poles disposed at 90 DEG intervals around the axis of the rotor, a first exciting winding wound on the first magnetic member and a second exciting winding wound o the second magnetic member. A display unit is provided with the rotating display element and a driving device for driving it. The driving device has first and second power supply means for supplying power to the first exciting winding in reverse directions and third and fourth power supply means for supplying power to the second exciting winding in reverse directions. |
