| 摘要 |
A virtual keyboard structure of an electronic device includes a projection module, two vibration sensors, a storage module, and a processor. The projection module is used for projecting a virtual keyboard having virtual keys. The two vibration sensors are used for detecting a center of vibration when the virtual keyboard is knocked on the center to obtain data of two directions. The storage module is used for storing dimensions of a coordinate system, a plurality of press-key data, coordinates of the virtual keys, and two respective reference positions of the vibration sensors. Finally, the processor is used for computing a coordinate of the vibration center and for matching the coordinate of the vibration center in the coordinates of the virtual keys to obtain a target virtual key corresponding to the vibration center and outputting one of the press-key data corresponding to the target virtual key.
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