| 摘要 |
A lecture system using a projector and a writing method in the system are provided to enable a lecturer to write or draw a line to increase the understandability of students. An electronic pen(140) generates the first and second infrared signals by comprising two infrared oscillators. A projector(110) calculates the position of the electronic pen by using the infrared signals and transmits the obtained position information to a user terminal(100). The user terminal connects the location information, generates an image, and then displays the generated image. |
