| 摘要 |
An electronic system is provided, including a writing device, first and second image capturing units and a control module. The writing device has a pen point to write on a writing board, and has a first light-emitting unit to emit a first detection light. The first and second image capturing units are respectively disposed on a first corner and a second corner of the writing board to receive the first detection light in a writing mode, in order to respectively generate first and second image signals. The control module obtains the coordinates of the writing device on the writing board according to the first and second image signals, such that, when the writing device writes on the writing board, the control module determines to operate in the writing mode, and simultaneously records a writing track of the writing device.
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