| 摘要 |
A display device is constructed with a support for cyclic or repetitive motion. An array of lights is mounted on the support for sweeping across a region of space during motion of the support. A microcontroller or other microprocessor is coupled to the lights for turning on and off the respective lights of the array. A periodically actuated switch such as an inertial switch is coupled to the microcontroller for measuring the time period or cycle time of a cycle of the cyclic or repetitive motion of the support and for indicating initiation of a cycle. The microcontroller is programmed for synchronizing the turning on and off of respective lights of the array according to the time period or cycle time of a cycle of the cyclic or repetitive motion of the support for forming at least one image across the region of space swept by the array of lights using persistence of vision of a viewer. According to one example the support is a hand held wand for hand held swinging motion back and forth. The array of lights is a column of LED's mounted along the wand for sweeping across a two dimensional area of space. The swinging motion of the wand back and forth can form e.g. alphanumeric characters, words, and sentences for conveying messages. Animated images may also be displayed. Other display devices in other environments with periodic, cyclic, or repetitive motion are also described.
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