| 摘要 |
A wireless beam-pen pointing device is proposed, which is designed for use with a computer unit, a presentation screen, and a beam pen. The presentation screen is coupled with a beam-spot position detector which is capable of detecting the beam-spot position where the light beam strikes on the presentation screen and transfer the beam-spot position data to the notebook computer. In response, the notebook computer will move the cursor to the detected beam-spot position. The beam pen is capable of emitting a light beam, such as a laser beam, which allows the speaker to point the light beam at a particular object displayed on the presentation screen that is currently being mentioned in the speaker's speech. The cursor movement is under control by the light beam, so that the cursor will be moved to the location currently pointed by the light beam. When the presentation speaker wants select an object or choose a command currently pointed by the cursor, he/she needs just to click or double click the buttons on the beam pen. This action will cause the beam pen to output a control signal and send it via wireless link to the notebook computer, causing the notebook computer to select the object or choose the command currently pointed by the cursor. |
