| 摘要 |
A projector system including input pens, the projector system being capable of preventing a user from forgetting to return the input pen to a predetermined place after using the input pen is provided. When the projector system receives power-off operation during an operation, if at least one of the input pens is not stored in a pen housing unit, a warning message is projected by an image projecting unit. If all the input pens are housed in the pen housing unit, a power supply for the projector system is turned off. |
